PRODUCTIVE FARMING KARY C.DAVIS From the collection of the f \ ' d z m o Prelinger V li Jj ibrary San Francisco, California 2007 PRODUCTIVE FARMING BY KARY CADMUS DAVIS, Pn.D. (Cornell Univ.) PROFESSOR OP AGRICULTURE, KNAPP SCHOOL OP COUNTRY LIFE, GEORGE PEABODY COLLEGE FOR TEACHERS; FORMERLY PROFESSOR OF AGRONOMY, NEW JERSEY COLLEGE OP AGRICULTURE (RUTGERS) ; INSTRUCTOR IN AGRICULTURE, UNI- VERSITY OF VIRGINIA SUMMER SCHOOL; PROFESSOR OF HORTICULTURE, WEST VIRGINIA UNIVERSITY: PRINCIPAL, DUNN COUNTY (WIS.) SCHOOL OF AGRICULTURE; DEAN, STATE SCHOOL OF AGRICUL- TURE, CANTON, 3,1. ?.: CONDUCTOR MANY SUMMER TRAINING SCHOOLS; INSTRUCTOR IN FARMERS' INSTITUTES THIRD EDITION, REVISED AND ENLARGED PHILADELPHIA AND LONDON J. B. LTPPINCOTT COMPANY COPYRIGHT, 1911 BY J. B. LIPPINCOTT COMPANY COPYRIGHT, 1912 BY J. B. LIPPINCOTT COMPANY COPYRIGHT, 1917 BY J. B. LIPPINCOTT COMPANY PRINTED BY J. B. LIPPINCOTT COMPANY AT THE WASHINGTON SQUARE PRESS PHILADELPHIA, U. B. A. PREFACE THIS book is intended to suit the needs of rural schools of all kinds, and graded^ village and city schools chiefly below high-school rank. It is believed that many high-schools wanting a less advanced course in agriculture than is offered in more difficult books will find this text helpful. It is hoped that farmers and others pursuing a short course, a reading-circle course, a correspondence course, or a home- reading course will find this volume of value. Such persons should read the exercises but probably omit the trial of some of them. In the preparation of this book the writer has been aided very materially by a number of people- The ever-present memory of the boys and girls with whom the writer has associated as a schoolmate or as teacher in the rural schools and graded schools has been an inspiration and help in pre- paring every lesson to be studied by other such boys and girls. The many teachers of both rural and graded schools who have criticized the lessons as they have been presented by the writer have spurred him on to do his best in the mak- ing of this book. It is to such teachers and such boys and girls that this book should be dedicated, for they have been in the writer's mind every moment of the time. Special acknowledgment is due to a number of persons who have helped in the preparation of the whole book or of special chapters. Professor Dick J. Crosby, Specialist in Agricultural Education of the United States Department of Agriculture, has read the first manuscript of the whole book and parts of the second draft. His suggestions and help have been so valuable that his name should go on the title page if he would allow it. He has read the proofs, and iv PREFACE through him many photographs have been supplied by the Department of Agriculture. Cuts made from those photo- graphs are marked "A. E." of agricultural education. In like manner, Frederick C.§Minkler, Professor of Ani- mal Husbandry of the New Jersey College of Agriculture, has read the manuscript and proofs of several chapters on Animal Production, Animal Breeding, Horses, Cattle, Sheep, and Swine. Other Professors of the same institution have read the manuscript and proofs of a number of other chapters: Dr. Jacob G. Lipman, Director of the Agricul- tural Experiment Station, the five chapters on Soils and their Improvement; Professor Harry R. Lewis, Head of the Poultry and Dairy Departments, the chapters on Poultry Management and Cattle Products; Dr. John B. Smith, State Entomologist, the chapters on Insects and Bee-keeping; Professor Maurice A. Blake, Head of the Horticulture Department, the chapter on Fruit Production; Dr. Byron D. Halsted, Botanist and Plant Pathologist, the first chapter and the chapter on Plant Diseases and Spraying; Walter W. Shute, Instructor in Forage Crops, the chapters on Field Crops and on Alfalfa; Arthur J. Farley, of the Horticulture Department, the Sections on Spraying and the Tables of Insecticides and Fungicides; Dr. Myron T. Scudder, Head- master of the Rutgers Preparatory School and Professor of the Science of Teaching in Rutgers College, has read manuscripts and proofs of the Introduction and the chapter on The Business of Farming. Mrs. Kary C. Davis has read and criticized the whole manuscript and corrected the proofs. She has made nearly all of the pen-and-ink drawings in the book. To all of these and others, including many farmers and teachers whose names do not appear, the author is greatly indebted for material aid and encouragement. Photographs besides those already mentioned have been kindly furnished by the Agronomist and the Dairy Division of the United States Department of Agriculture. These PREFACE v are marked under illustrations : "An. I." for Animal Industry, and "PL I." for Plant Industry. Credits are given with the name of the station to those furnished by State Experiment Stations: "Kans.," "W. Va.," "Wis.," "N. J.," "Minn.," "Maine," "Cornell." Professors Harry R. Lewis and Maurice A. Blake kindly supplied a number of photographs; animal photographs were also given by F. Warren Sumner, of Elizabeth, N. J., the White Wyandotte Hen; Thos. Wyckoff, Orchard Lake, Mich., the Rambouillet Ram; Cornell Countryman, the Dorsets; Chas. Leet, Mantua, Ohio, Southdown Ewe; R. C. Parsons, Grand Ledge, Mich., Oxford Ram; A. T. Gamber, Wakeman, O., American Merino. Cuts have been loaned by the author and the J. B. Lippin- cott Co. from John B. Smith's "Insect Friends and Ene- mies," and "Economic Entomology." The author will be glad to receive suggestions and cor- rections from teachers and others regarding any mistakes in the book. PREFACE TO THIRD EDITION THE chapter on Cotton was added in the second edition. The third edition included a number of changes in the Appen- dix tables to bring the matter up to date. Suggestions to Teachers for additional exercises and projects have been added to the Appendix. Changes and many additions have been made through the text, and the present Chapters XVI and XXXI have been added. NASHVILLE, TENN., July, 1917. 3 CONTENTS INTRODUCTION. — THE TEACHING OF AGRICULTURE PART I.— PLANT PRODUCTION I. STRUCTURE AND PHYSIOLOGY OF PLANTS 8 II. PLANT IMPROVEMENT — GOODI SEED 22 III. PROPAGATION OF PLANTS WITHOUT SEEDS 35 IV. How SOILS ARE FORMED 44 V. KINDS OF SOILS — THEIR CHARACTERISTICS 52 VI. SOIL MOISTURE 60 VII. LAND DRAINAGE 67 VIII. SOIL IMPROVEMENT 71 IX. SYSTEMS OF CROPPING 88 X. FARM CROPS 97 XI. ALFALFA Ill XII. COTTON PRODUCTION « 117 XIII. CORN 133 XIV. SMALL GRAINS 154 XV. POTATOES 162 XVI. TOBACCO FOR MARKET 175 XVII. THE PRINCIPLES OF FORESTRY 178 XVIII. GARDENING 191 XIX. FRUIT PRODUCTION 206 XX. INSECTS 220 XXI. DISEASES OF PLANTS — SPRAYING 246 PART II.— ANIMAL PRODUCTION XXII. IMPROVEMENT OF ANIMALS 259 XXIII. HORSES . 262 Vlll CONTENTS XXIV. CATTLE 279 XXV. SHEEP 293 XXVI. SWINE 300 XXVII. POULTRY MANAGEMENT 305 XXVIII. BEE-KEEPING 321 XXIX. FEEDS AND FEEDING 327 PART III.— ANIMAL PRODUCTS XXX. CATTLE PRODUCTS 344 PART IV.— FARM MANAGEMENT XXXI. THE BUSINESS OF FARMING 360 XXXII. ROAD CONSTRUCTION AND MAINTENANCE 371 XXXIII. WORK WITH ROPE 376 XXXIV. REPAIR OF FARM EQUIPMENT — HANDY DEVICES 385 PART V .—APPENDIX— REFERENCE TABLES I. REFERENCE BOOKS 391 II. LIST OF EXPERIMENT STATIONS 393 III. INSECTICIDES AND FUNGICIDES 395 IV. QUANTITY OF SEED PER ACRE AND LEGAL WEIGHTS. 399 V. SAMPLE PEDIGREE OF PURE BRED CATTLE 400 VI. RULES 401 VII. FERTILIZER FORMULAS 402 VIII. AVERAGE DIGESTIBILITY o? FEEDS AND THEIR FER- TILITY 405 IX. FEEDING STANDARDS 406 X. AVERAGE COMPOSITION OF FARM MANURES 407 XI. DISTANCES APART FOR PLANTING FRUIT 407 XII. USUAL DISTANCES APART FOR PLANTING VEGETABLES 408 XIII. SUGGESTIONS TO TEACHERS FOR ADDITIONAL EXER- CISES AND PROJECTS 409 INDEX . 419 PRODUCTIVE FARMING INTRODUCTION THE TEACHING OF AGRICULTURE THE demand for the teaching of agriculture in the public schools is growing stronger all the time. In many States of the Union and several provinces of Canada the subject has been introduced into schools very generally. Not only has the subject been taken up in the high-schools, but also in special schools started for the avowed purpose of teaching agriculture, manual training, and domestic economy. This is in response to the very general demand for more practical instruction. The feeling exists that the schools have been doing work too remote from real life; and that where the work has touched the life at all, it has been the city side or the commercial side rather than the productive side and the industrial side of life. Such training tends to lead all, or nearly all, young people away from rather than toward the industrial and productive callings. The census reports indicate that this tendency has aided in building up the cities and actually decreasing the population in many of the rural districts. The interest in rural life should be kept up by the train- ing received in country schools, and in all schools. A proper conception of the opportunities afforded in the country should be in the minds of all young people — whether they live in cities or in the country. The productive wealth of the nation is from the country, not from the city. This wealth should be used to improve rural life rather than city 1 * PRODUCTIVE FARMING life. All young people should learn of the opportunities for health, independence, happiness, and wealth afforded by the country. Those living in the country often fail to realize their blessings. They rush in dangerous numbers to the cities, until every legitimate city occupation is overcrowded. Hosts of them are left to seek livelihoods by devices and means that are at least not elevating. The comforts and conveniences enjoyed by a few in the cities are very alluring to the young ambitious mind. Why not show that things better than these are in the country — and that many of these same comforts may be enjoyed by rural communities. Suggestions to Teachers. — The teaching of agriculture is most easily done by taking up those subjects nearest at hand. Teach the lines of agriculture that will be most valu- able in your community. If in a gardening section the special garden crops will be most interesting; in a dairy section study dairy breeds, the testing of milk, the dairy products; in the corn belt the class will delight in the study of corn improvement, the testing of seed corn, and the judging of corn by score cards. There are certain chapters in this book which are funda- mental and cannot be omitted. For example, Chapter I is necessary to the proper understanding of other plant studies. However, there are certain other chapters which may be taken independently at a time of year which suits the sub- ject. The chapter on Forage Crops and perhaps others may well be used as reading lessons and then studied more in detail later. How to Begin. — Enter heartily into the new subject without hesitation. Teach the newest things in agriculture. It will be easier for you to teach these than to teach the topics more familiar to the class. This is particularly so if the pupils are from farms. The field is so broad no one can know it all. Teach the facts which you know best and THE TEACHING OF AGRICULTURE 3 which are newest to the class: the making of spray mix- tures; the prevention of certain plant diseases; the raising and use of special crops which should be grown, as, perhaps, alfalfa, or certain clovers; the green-soiling methods of feeding; use of catch crops and cover crops; the saving of Boil moisture. The best United States Farmers' Bulletins will help you along these newer lines and will give you new points on the old themes. Why? It is because the U. S. Depart- ment of Agriculture and fifty or more agricultural experiment stations are finding out new things in agriculture all the time. Farmers' Bulletins. — References to United States Farm- ers' Bulletins are given at the close of the chapters. A com- plete list of Farmers' Bulletins can be had by writing to the Secretary of Agriculture, Washington, D. C. Besides those listed at the close of the chapters, there are others that will be helpful in schools. Write for them. They are free to schools. Make pasteboard holders for the Bulletins. Put labels on these so that a simple classification will be possible. Label them similar to the chapters in this book. How to Use the Bulletins. — Teachers will find the United States Farmers' Bulletins very useful. Let us illustrate. No. 617, "School Lessons on Corn," is full of suggestions for teachers and others. It tells what to do and how to do it. The pictures are simple and plain. Most of the Bulletins are well illustrated and plainly written. Each of these Bulletins has a special use in teaching some definite subject. Have advanced pupils use the Bulletins as extra work, or as supplementary reading. Time Saved. — If the objection is raised that there is no room in the schedule — no time — for a new subject because there are already too many subjects to teach, answer by saying there is always room for a subject that will hold the pupils' interest. Such subjects, if practical, are the best in the school course. 4 PRODUCTIVE FARMING Arranging the Schedule. — A "sliding schedule" may be made to admit agriculture without reducing the recitation time for other subjects, thus: First plan — On Mondays let agriculture take the place of the first morning recitation period; on Tuesdays, the second period; on Wednesdays, the third period, and so on through the week. Another plan would be to have agriculture three times a week, alternating with some three other subjects, — each of them being given four times a week. Another time-saving plan to use in the smaller rural schools is to combine several of the upper classes into one class when teaching a new subject like agriculture. Correlation. — It is, indeed, a very good plan to correlate the work in agriculture with other subjects in school. The other subjects will be made far more interesting to most of the pupils if agriculture is made the center of interest around which to group these other subjects. School English is made more interesting by having pupils read and write and speak on those themes which are close to human life. Language comes forth spontaneously when the pupils have something real to tell or to write about. New words in this book or in the Bulletins should be woven into the spelling and language work. A few arithmetical problems have been suggested in this book. These will serve to show that much of the arithmetic work of the school can be founded on agriculture or enriched by it. One of the best ways to study local geography is to study the soils of the neighborhood (Fig. 1). Trips may be taken by the class to near-by places where examples of erosion are shown, or the action of ancient glaciers, or the cropping out of ledges of sedimentary rocks. Study soil-depths, soil- textures, and soil improvement. Take samples of soils and Bubsoils. The study of the ways in which soils are being formed all about the neighborhood is real geography. THE TEACHING OF AGRICULTURE 5 All this should be done not solely for the sake of agricul- ture, but for the sake of more interest in other subjects when the agricultural matter is introduced. There is as much or more cultural value in the teaching of a practical subject as in teaching any other subject in the school course. FIG. 1. — Studying soils and potting plants. Graded school work in Virginia. Use the Exercises.-j-The practical exercises offered in this book are simple and can be performed by pupils themselves with a little guidance. Pupils will be willing to supply the necessary articles in most cases. The exercises add much to the interest and also to the value of the work. The work should be directly with things, handling them, reasoning from them. Use also the exercises given in United States Farmers' Bulletins 428, 586, 606, 609, 617. Suit the subject considered to the season so far as con- venient. Seed testing is a good exercise for early spring. School garden work will come later. Do not fail to provide window boxes. The pupils will do the work gladly, and in the spring season fill them with germinating seeds and growing plants. Teachers will find that agriculture will add a new interest to the whole school work. Exhibits of the school garden pro- 6 PRODUCTIVE FARMING ducts may be made at the school in the fall. Prizes may be offered for the best products grown by the pupils in the home gardens. Money to buy prizes may be raised by charging an admission fee when the exhibit is made. If the exhibit is small, supplement it wit'h a suitable program. A Community Center. — The public affairs of the commu- nity should center about the school much of the time during the school year. The teacher may appoint committees to arrange the details of many events to be held at the school or at other near-by places in the name of the school. Hold corn exhibits in the fall or early winter and let students and others enter into corn-judging contests. Apple shows and vegetable shows may be held at separate times or in connection with the corn show. Poultry shows and dairy-product shows may be possible in some places. Premium lists should be issued to the pupils to take home, or they may be published in local papers. Award cards may be issued in lieu of premiums; but the merchants or neighbors may be called upon to contribute suitable articles to be used as prizes. Read Circular 99, U. S. Office of Experiment Stations, on "Farmers' Institutes for Young People." Boys' and Girls' Clubs. — The school should be the center for the organization of boys' corn clubs, or alfalfa clubs, or experimental clubs. Girls' clubs may be organized. They may follow nature study, or home gardening, or sewing, or basketry. Let the work of all these clubs be shown at the school on stated occasions. Read Farmers' Bulletin 562. Special school exercises of an appropriate nature should be given on arbor day, bird day, corn day, alfalfa day, and other special days. Always have the patrons of the school present on these occasions. Make the school building the attractive center for the people of the community. The newer lines of education will connect with the life of the com- munity at every point. THE TEACHING OF AGRICULTURE 7 Let school holidays and perhaps other days be filled with historical or agricultural or other pageants suitable to the season; have appropriate contests, school games, and good sports. Let there be recreational diversion for old and young. Appoint committees to cooperate in preparing for these occasions. Problems. — A few problems here will be suggestive and serve as sample problems to be placed on the board for pupils, from time to time. 1. Calculate the number of cabbages on an acre if they are set as close as shown in Appendix, Table XII, allowing for one-fourth loss. 2. If cabbage worms destroy one-third of the above result, and the good heads bring 5 cents per head, what is the income for the acre? 3. What would be the money value of the heads destroyed by cabbage worms? 4. If a boy working at $1 per day can dust three acres of cabbage plants a day and keep off the worms, what is the profit for his day's work, if the material costs 90 cents? 5. A man has 500 young apple trees attacked by woolly aphis insects, which he wishes to spray with kerosene emulsion to save the trees. If six gallons of the stock solution given in Appendix, Table III, are required (diluted with ten parts water), calculate the cost of mate- rials at present local prices for soap and kerosene. 6. If the use of the sprayers is worth SI and the labor can be done by two men in a day and a quarter, what is the total cost cf the spraying job? 7. If a pair of bluebirds, in seeking food for their young in the nest, gather 120. worms from an old orchard each day, and each worm is thereby prevented from doing five cents' worth of damage to fruit, calculate the value of these birds in one nesting season of sixteen days. 8. A solitary wasp collected for her brood thirty-eight apple worms, and thus prevented each of these worms from maturing and laying 200 eggs, each of which would have caused an apple to be wormy. Consider the apples each worth two cents more when not affected with the worms. What is ths value to man of this solitary wasp ? 9. A toad ate ten cutworms each night and thus saved a like number of tomato plants in my garden. What do you consider is a fair value of a tomato plant in cost and labor after it is set in the garden ? What is the value of this toad in three weeks ? References. — U. S. Farmers' Bulletins 586 and 606, on Collection .and Preservation of Material for Study of Agriculture. 2 PART I. PLANT PRODUCTION CHAPTER I. STRUCTURE AND PHYSIOLOGY OF PLANTS. THE plants produced in field and garden form the food for man and nourishment for his live stock. Parts of plants are useful in the arts, as their oils for paint, their fibers for clothing, and their wood for buildings and fuel. The parts of farm plants are broadly considered to be made up of (1) root, (2) stem, (3) leaf, ,(4) flower, and (5) seed. Roots of plants are for three purposes: to hold the plant in place or prevent its blowing away; to take nourishment and moisture from the soil; and to serve as storage places for plant food. In growing into the soil the tip of the root forces its way among the soil particles. For this reason there is a root cap or covering over the tip to prevent injury. The growth takes place a little back of the tip cap, or covering, at the end of the fine roots. Root=hairs are formed on the fibrous roots a little distance from the tips. These are of fine growth, giving a plush or velvety surface to the root. The surface of all these fine hairs is very thin and is much greater in area than the sur- face of the roots. This allows moisture from the soil to pass through into the plant more easily. EXERCISE. — To Show Root-hairs. — Plant a few kernels of corn in moist sand or soil in a bottle with wide mouth. 8 STRUCTURE AND PHYSIOLOGY OF PLANTS 9 "Wrap some black or dark paper around the body of the bottle to exclude the light. Roots seek darkness. Keep the soil moist and in a warm room for a week or so. The growth of the young roots will then have reached the inside surface of the glass. Notice their very fine, plush-like appearance (Figs. 2a and 6). Notice also which grow in length faster during the first two weeks, the roots or the tops of the young corn plants. FIG. 2o. — Corn grown in a bottle of soil. The dark paper around it excludes the light, so the roots may be studied by removing the paper. FIG. 2&. — Corn grown as in Fig. 2a, showing fibrous roots and root-hairs for absorbing moisture. EXERCISE. — Root-hairs on Seedlings. — Sprout some seeds of squash or beans in folds of moist blotters between two plates until the roots are two or three inches long. Examine for root-hairs on these by holding them against a dark cloth or paper. Stems of plants have several uses: They support the leaves and hold them up to the air and light. They serve as storehouses for the saving of starch, sugar, and other forms of nourishment for the future use of the plant. They are the channels of circulation of plant sap and the transfer of plant food from root to leaf and from leaf to root. 10 PRODUCTIVE FARMING EXERCISE. — Sap Channels in Stems. — Put the stems of fresh plants into water colored with red ink. After a few hours cut off the stems and notice the stained places on the cut surface. Use for this exercise some woody stems, as willow, and others like celery or rhubarb, golden-rod, corn, tall grass, or other convenient plants. The different ways in which the stems of various plants hold the leaves up to the light and air are interesting. Vines do this by climbing upon objects which they may find near them. Trees have rigid stems which hold the leaves high in the air. Those growing in dense forest clumps are taller and more slender than those growing in open places where there is plenty of light. This is also true of corn-stalks planted close or far apart. The leaves of the plant have much work to do. They secure substances from the air, chiefly carbon dioxide, and change it into forms of food that will build up the plant or produce growth. The leaves also permit the escape of water from the plant into the air. Water is taken up by the roots, not by the leaves. There are large amounts of water given off by the leaves during the growth of the plants. EXERCISE. — Plants Absorb Moisture. — Get the material shown in Fig. 3a. After the corn or other plant is a few inches high, start the experiment. Have the water line marked on the lard pails one inch above the bottom of the pots. Each day fill the water up to the mark, and record the amount required for each pail in two weeks. If the one with the growing plant requires the most, where has the extra water gone to ? EXERCISE. — Moisture from Leaves. — Arrange an exper- iment as shown in Fig. 36. The moisture which escapes from the leaves will partly be condensed on the inside of the inverted glass, and may be seen in fine mist or drops. Leaf Structure. — Fig. 4 shows the cut edge of a leaf. Between the upper and lower surfaces of the leaf there are STRUCTURE AND PHYSIOLOGY OF PLANTS 11 many soft plant cells. These cells have very thin walls and are bathed by air. The air cavities are shown at A in the figure. All the cells shown with dark grains in the figure contain the green coloring matter of the leaf. This is called chlorophyl (klo-ro-fil). The use of this will be spoken of later. FIG. 3a. — Growing plants absorb moisture from the soil. Two flower-pots with equal amounts of the same kind of soil are set in lard pails having water up to the line shown. Corn is growing only in the left one. (Agricultural Education.) FIG. 3fe. — Evaporation of water from leaves. The condensed moisture shows in the upper part of the glass inverted over the growing plant. (Agricultural Education.) EXERCISE. — Skin of Leaf. — Break a leaf partly in two in such a manner as to peel the surface away from the inner cells. This surface layer of cells is clear and contains no chlorophyl, as shown in Fig. 4. The outer layer of cells is so thin and clear that sunlight may pass through and reach the green cells of the inner part of the leaf. Air Openings. — Air may enter the leaf through small openings, chiefly on the under side. - One of these openings is marked S in Fig. 4. These are called stomates, the word meaning "mouths." There are great numbers of the sto- mates on the under surface of leaves. Thej^ may be opened or closed according to the condition of the weather. This is done by the action of a pair of cells at the opening called 12 PRODUCTIVE FARMING guard-cells. The stomates are partly closed in dry weather. This keeps moisture from passing too freely out of the leaves into the air. Plants Get Food from Air. — Growing plants take much of the substance which produces growth directly from the air. They use the carbon dioxide from the air which is given off to the air by the breathing of animals and by the burning and decay of wood. This plant-food from the air furnishes about ninety-five per cent of the dry weight of plants. It is through the leaves that this form of food is taken. The FIG. 4. — Cross section of leaf. The inner cells contain chlorophyl: those near tha under side are loose to allow the free passage of air (A). Many breathing pores are in the under skin. One shows at 3. breathing pores on the surface of green leaves allow the air to come in contact with the soft cells of the inner tissue (Fig. 4). Sunlight aids the plant in changing the carbon dioxide into starch or other organic food. Only those plants which contain the green coloring matter, chlorophyl, are able to use the carbon dioxide from the air and change it in this way. Mushrooms grow in the dark, and have no chlorophyl. Their food is not taken from the air nor from the real soil, but from the partly decomposed matter in the soil. EXERCISE. — Need of Sunlight. — Place a board, box, or other object over the green grass of a lawn and let it remain for several days. Notice that the color is soon gone from the leaves. In time the grass would be killed. Celery is STRUCTURE AND PHYSIOLOGY OF PLANTS 13 blanched by excluding the light from the stems. Why does a covering of straw or other thick mulch in a strawberry patch prevent the growth of weeds? What harm comes from the accidental covering with soil of young corn plants by the 'cultivator? EXERCISE. — Leaves Seek Light. — Set some growing plants in the window for a few hours and notice that the leaves turn toward the light. Turn the plants around and see how long it takes for the leaves to face the light again. EXERCISE. — To Show Presence of Starch. — Crack a few kernels of wheat or corn and treat them with a few drops of iodine. The change of color which follows is a proof of the presence of starch. This was stored in the seed for its future use. Starch turns blue when treated with iodine. The same trial made with potato, corn-pith, pith of tree twigs, and many seeds, will show the presence of starch. Balance in Nature. — Animals use large quantities of oxygen from the air and return carbon dioxide to the air. Plants make use of the waste which animals breathe off. The plants break up this gas, retaining the carbon and giving off the oxygen. A small amount of oxygen is also used by plants. The carbon retained by the leaves and the water which the plants obtain from the soil are combined to form organic matter. This is chiefly starch at first, but it may be readily changed to sugar or other forms suitable for storage. In sugar-beets and sugar-cane the storage matter is largely sugar. Tissue for new growth of the plant may be formed either from stored plant-food or from newly-formed plant-food that has not been taken to any storage place in the plant. EXERCISE. — Balance of Life in an Aquarium. — Make an aquarium in a large fruit-jar or other glass vessel, as shown in Fig. 5. Very clear sand is used in the bottom. The plants are started from pieces of water plants commonly growing in ponds or lakes. The animals may be water insects of 14 PRODUCTIVE FARMING several kinds — polliwogs, water snails, and small fish. Set the aquarium in a very light place. When the plants begin to grow, they will give off oxygen to the water. The animals will breathe the oxygen from the water. A little careful observation will tell whether there are too many animals in the aquarium or not. If the fishes come to the surface to breathe a great deal, some of them should be taken out. Snails and polli- wogs are scavengers and will eat the waste matter gathering on the inside of the glass and on the plants. Do not let the pupils feed the fishes too much. This will spoil the water for the fishes. How Plants Get Water. — The moisture from the soil is the only water taken in by farm crops. This enters through the thin covering of the root- hairs growing on the fibrous roots. The absorbing surface is very great and large quantities of liquid are taken up. It is estimated that several hun- dred tons of water or liquid food are taken up by a corn crop to produce one ton of dry fodder. Osmosis is the name of the process by which liquid food is taken into the plant through the roots. A little of the acid or other cell sap in the roots passes into the soil at the same time. There is a sort of trading of two liquids through the surface membrane of the root-hairs. A very little of the denser liquid of the plant is sent out in exchange for a large quantity of soil water. Osmosis may be defined as the exchange of two different liquids through a thin membrane which separates them. Two liquids separated by a membrane will pass through it and mingle with each other. Soil water will thus reach and FIG. 5. — A sunlight aquarium. The plants fur- nish oyxgen ana the ani- mals use it. The animals produce carbon dioxide and the plants use it. STRUCTURE AND PHYSIOLOGY OF PLANTS 15 mingle with the contents of root-hairs. The thin liquid passes more rapidly. Osmosis may be well illustrated in a number of ways. EXERCISE. — Osmosis with Potato. — Take a wilted potato tuber and cut it into slices about one-fourth inch thick. Place a few slices in water. They become more rigid in an hour or so because of the water taken into the cells. Place a few slices in strong salt water. They become more flaccid or wilted because of the water drawn from them into the brine. The potato sap is naturally denser than water, but not so dense as the salt water. EXERCISE. — Osmosis with an Egg. — In the small end of an egg make a hole a little larger than a pin head. Over this hole fasten a short piece of glass tubing. Melted paraffin or wax will fasten it well. At the large end of the egg chip away a bit of the shell. Place it with the large end down in the wide mouth of a bottle which is full of water (Fig. 6). After several hours liquid will be seen to rise in the tube, evidently caused by water making its way through the thin membrane lining the egg-shell. This membrane shows no pores even under the microscope. Plant=food from Soil. — If plants take about ninety-five per cent of their food from the air there is left only about five per cent to be obtained from the soil. The plant-food from soils must be in soluble form, and is taken in with the soil water. When plant-food is soluble it can pass through the membrane of the fine root-hairs growing on the roots of plants. It produces in the plant the part of the tissue which is called the ash or mineral matter. FIG. 6. — Osmosis with an egg over a bottle of •water. The egg liquid and the water exchange places through the membrane of the egg. Water moves the faster and soon fills the shell to overflowing. 16 PRODUCTIVE FARMING PROBLEM. — One hundred pounds of cured corn fodder contain 58 pounds of dry matter, 2.9 pounds of which are from the soil and the remainder from the air. What per cent of the dry matter is from each source? EXERCISE. — Mineral Matter in Plants. — Burn a piece of very dry wood on a stove shovel in the stove, to save all the ashes on the shovel. If the dry wood be weighed first and the ashes be weighed afterward the exact proportion can be determined. The ash represents nearly all of the mineral matter in the wood. This part comes from the soil and the remainder chiefly from the air. This exercise shows how small a part of the plant's food is from the soil ; but this part is very necessary. Our farm crops could not live without the ash or mineral matter which they obtain from the soil. Other Needs of the Plant. — We have already seen that most plants need light to make use of the food which they get from the air. Light is not necessary for the germination of seeds in the soil. The leaves of the young plant soon seek the light by growing toward the surface of the soil. The need of moisture has also been considered. Other needs of the plants are a proper amount of warmth and a supply of air. Light, heat, moisture, and air are all needed by growing crops. Temperatures. — Certain degrees of warmth are necessary for the best growth of plants and the sprouting of seeds. Very few seeds will sprout if colder than 40 degrees F. or warmer than 115°. W^heat will not sprout below 41° and prefers a warmth of 60° or 70°. Corn needs more heat; even 48° is too cold for it and soil as warm as 70° or even 90° suits it better. Seeds that sprout in cool soil may be planted in earliest spring time; while those which require more heat must be planted later. Air and Oxygen. — Not only must the leaves and stems of plants have free access to air, but the roots of our farm STRUCTURE AND PHYSIOLOGY OF PLANTS 17 crops must be in soils supplied with oxygen. If there is too much standing water in a field the air is excluded from the soil and crops do not thrive. The leaves of plants turn yellowish and show an unhealthy condition if the soil is not supplied with air. This may be noticed in the wet parts of a cornfield. If the soil is well drained, the surplus water gets away and air is drawn into the soil. « EXERCISE. — Need of Air for Germination. — Put a dozen or more beans or kernels of corn in a bottle nearly full of water. In another bottle place a dozen of the same kind, thoroughly wet but not submerged in water. Cover both bottles loosely to prevent loss of water. Put both in a warm place and watch results for a week or so. The water in the first bottle excludes the air from the seeds. If they do not sprout it will be for want of air. When crops are planted in low, wet places in fields the seeds refuse to grow for lack of air. EXERCISE. — Need of Air in Soil. — Two cans of soil may be planted alike with the beans or corn. Have one can watertight at the bottom, and the other with plenty of holes through the bottom for drainage. When the plants have grown a few inches high fill the undrained can with water to the top of the soil. Notice the effect on the plants in that can. Compare with the others having air and moist- ure both in the soil. Purpose of Flowers. — The main aim of life for all plants is to produce seed. To do this a flower must be formed. The form and structure of flowers are quite variable, as seen when the strawberry is compared with the lady-slipper and the apple. A perfect flower has two different kinds of essential organs, the pistils and the stamens. The stamens bear pollen, which is carried to, or falls upon, the pistil. This fertilizes the pistil and enables it to produce the seed. The seed or seeds of most plants are borne in the lower part oi 18 PRODUCTIVE FARMING the pistil called the ovary, as shown in Fig. 8. The other parts of a perfect flower are shown in that figure. Imperfect Flowers. — The flowers of many plants are not perfect. Some of them bear the stamens only and others the pistils. In the cucumber, musk-melon, and others, the stamens and the pistils are in different flowers on the 'same plant. In any case where the flowers are not perfect, the FIG. 7. — Strawberry blossoms. Those on the left are of varieties each having; both stamens and pistils. Those on the right have only pistils. Varieties whi-cn have only pistils must be grown near perfect varieties so the pollen may be carried to them at the blossoming time. (Experiment Station, N. J.) pollen must be carried by some means to the flowers having the pistils; otherwise seed could not be formed. How Pollen is Carried. — The pollen of corn and. many grasses is very light and dry and is carried by the wind. Some of it falls upon the pistils and grows, thus helping to form seed. The pollen of most fruits and vegetables is rather sticky and heavy and is carried by insects. Bees and other insects visit the blossoms in search of nectar to make honey. As they go from flower to flower even among the perfect blossoms, much pollen is distributed where it is needed. These insects are attracted to flowers by the bright showy colors of the petals of the flower, and by their fragrance. Showy petals and fragrant blossoms are not found on corn, STRUCTURE AND PHYSIOLOGY OF PLANTS 19 grains, and grasses, because their pollen is borne by the wind. Cross Pollination. — Plants are said to be cross pollinated when the pollen is taken from one to another by some means. Many of our fruit trees bear much more and better fruit when they are cross pollinated. A number of varieties of apples, pears, peaches, and plums will not bear fruit if grown by themselves. They produce abundant fruit when polli- nated by other varieties of the same class that blossom at the same time. For this reason it is of much benefit to have plenty of bees in the orchard at work gathering their supply of honey during the blossoming season. The owner of a large orchard should have a yard of beehives. The work of the bees gives him a larger crop of fruit as well as a crop of honey. EXERCISE. — Parts of a Flower. — The members of the class should examine a few large, simple flowers and learn to name the parts shown in Fig. 8. United States Farmers' Bulletin 408 will be helpful in this exercise. EXERCISE. — Pollination of Corn. — Have students or others bring to school ears of corn on which some of the kernels failed to develop. This shows the result of poor pollination. Perhaps a hot wind injured the silks, or pistils, before the pollen was re- ceived. Other ears may be shown which have sugar-corn kernels mixed with field corn, or have white kernels among the yellow, was carried from other corn plants. Two different kinds of corn should not be planted close together if it is desirable to keep the varieties pure. FIG. 8. — Diagram of cross sec- tion of a flower, p, pistil; o, ovary with young seed receiving the pol- len growth; ST, stamens; po, pollen scattering from stamen to pistil; PE, petals; BE, sepals. These prove that pollen 20 PRODUCTIVE FARMING Purpose of Seeds. — A true seed bears within its coats a minute plant called the germ. Its purpose is to develop into a new plant like the parent plant. Some nourishment is stored in the seed for the use of the young plant when it begins to grow. This store of nourishment in the bean is in the two seed leaves or thickened halves of the bean. In the corn kernel a store of starchy matter is found about the germ. EXERCISE. — Study of Seeds. — Soak some large lima beans and some kernels of corn for a few days. Let each member of the class find the little plant inside the bean coats; and the long oval germ of the corn imbedded in the store of starchy matter. Other large seeds may be soaked and studied closely. Duration of Life. — With respect to their length of life most farm plants are divided into three groups: annuals, biennials, and perennials. Annual plants are illustrated by corn, oats, beans, and peas. They germinate, grow, blossom, bear seed, and die within one year. No part lives over to the next year but the seed. Biennials are not so numerous among farm crops. Exam- ples are beets, carrots, parsnips, onions, and cabbage. They germinate, grow, and store a large supply of nourishment the first year. The second year they use up this store of nourishment, send up a flower stalk, produce flowers and seeds, and then die. Only the seeds live over. Perennials include many of the grasses, alfalfa, trees, shrubs, and many others. They germinate and grow for some time without bearing blossoms and seeds. When old enough they begin blossoming and bearing fruit. This may continue year after year for several or many years. The peach tree bears some fruit the second or third year and dies after ten or fifteen years. The apple tree does not bear so young but lives much longer. STRUCTURE AND PHYSIOLOGY OF PLANTS 21 REVIEW. 1. Name the five parts of a plant. 2. What two purposes have roots ? 3. What is the use of the root cap ? 4. Describe the location and appearance of root hairs. 5. Give several purposes of plant stems. 6. What are the uses of leaves ? 7. Draw and describe the structure of the leaf, showing the air cav- ities and the stomates. 8. What food do plants get from the air ? What do they make from this ? 9. What plants use sunlight ? How does it help them ? 10. Tell of the balance in nature in the production, and use of carbon dioxide and of oxygen. 11. Tell how the oxygen supply is produced and used in an aqua- rium in the window. 12. How do field crops get their water ? 13. What is osmosis ? 14. Give one or two examples of osmosis. 15. How much of the food of plants comes from the air, and how much from the soil ? 16. From what source is the ash or mineral matter derived ? The starch ? 17. Mention four climatic needs of the growing crop. 18. Tell of suitable temperatures for the sprouting of corn and of wheat. 19. What is the effect of no air in the soil, for germinating seeds and for growing crops ? 20. Tell of the purpose of flowers. 21. Name the two essential organs of a perfect flower, and give the use of each 22. Whac are the two chief ways by which pollen is carried ? 23. Give two ways in which flowers attract bees and other insects. 24. What is cross pollination ? Of what benefit is it in orchards ? 25. Why should fruit growers keep bees ? 26. What is the purpose of the germ in a seed ? 27. Where is the storage matter in the bean ? In the corn kernel 7 28. Give the life cycle of an annual. 29. Describe the work each year of the biennial plant. 30. Define a perennial. Give examples. References. — United States Farmers' Bulletins : 617, School Lessons on Corn; 1905 Yearbook, U. S. Department of Agriculture, pages 257-274, The Use of Illustrative Material in Teaching Agriculture in Rural Schools. 22 PRODUCTIVE FARMING CHAPTER II. PLANT IMPROVEMENT— GOOD SEED. ONE of the best ways to improve our crops on the farms or in the gardens is to select good seeds for planting. It is a law of nature that " like produces like." Seed Selection. — Careful selection year by year will gradually improve any crop. The seeds should be healthy in every respect, free from impurities, large and heavy for its kind, and taken from the best plants. We may save seeds from those plants in the garden that show the qualities which we want. The same care should be exercised in the selection of seed wheat, oats, rye, and other field crops. In the case of corn and potatoes it is possible to select seed in the field from the best individual plants or hills, but in the case of small grains this method would not be practicable. With these grains we should follow some good method of grading to secure good, large, plump kernels; such have the best characters (Fig. 9). Sifting and Fanning Grain. — Sieves are very useful for separating the poor seed from the good. Meshes of just the proper size are used to screen the large and let the small fall through the sieve. The practice of winnowing the grain, used in olden times, is now replaced by the use of fanning mills. Fanning devices are usually found in threshing ma- chines to separate the chaff, lighter seeds, and trash from the heavier grains. All seeds to be sown should be cleaned and re-cleaned until they are pure and of the best quality. (See exercise with large and small radish seeds, page 26.) Wheat and other small grains have been less improved by selection than corn because the kernels are handled less, and being smaller less attention is given to their individual PLANT IMPROVEMENT, GOOD SEED 23 characters when being harvested. The smaller grains are now receiving the attention of a few experiment stations, and valuable improvements are being made. Choosing from the Best. — With garden plants such as squashes, melons and tomatoes we should not only choose good specimens from which to save seed, but we should select those specimens from plants that yield large crops of good fruits. This selection can be done more carefully by the grower himself than it can by any wholesale methods where large quantities are carelessly saved from large areas. When map®*- T» '¥ FIG. 9. — Good plump wheat at the left; a poor type of wheat at the right, with, narrow shrivelled kernels. (Experiment Station, Kans.) a few desirable individual plants are found, they can be rapidly multiplied. The Ear=Row Method. — The best ear of corn from the best bearing stalk may be saved for seed and planted in a row by itself. This corn may produce many good stalks with ears as good or better than the one we began with. If the corn of each ear is grown in a separate row we can compare the yields of these rows and select the next seed accordingly. These best ears should be grown in a separate field where the wind cannot carry pollen to it from other cornfields. The Hill=Row Method. — Potatoes should be grown from those found on the best individual plants. If the potatoes from two plants or hills weigh about the same they may be planted in separate rows. The best row will next furnish the hills for seed-potatoes. Bud Selection. — Peaches, plums, apples, grapes, and some other fruits are propagated by the use of buds, grafts, 3 24 PRODUCTIVE FARMING cuttings, and divisions of the plants. The buds or other parts are taken from the best plants of the preferred varieties. Their seed, if used, would not come true to kind. EXERCISE. — Looking for Weed Seed. — Let each pupil have a half teaspoonful of clover or other common farm seeds. Spread them on a sheet of white paper. Let the seed be examined without the aid of lenses first. The weeds that are known should be put to one corner of the paper which is labeled "known weeds." In another place put the un- known weeds; and in another the dirt, grit, sticks, and other FIQ. 10. FIG. 11. FIG. 10. — Teacher showing the class how to examine a seed sample. FIG. 11. — Seeds on the thumb, magnified through a reading glass. dead matter; in another the shriveled seed of the kind you have present. Single seeds are removed by use of a moist pencil point or similar object. When the study is completed, count or estimate the lots of each kind to determine the per cent of each. EXERCISE. — Another Way of Looking at Seeds. — Moisten the first joint of the thumb of the left hand and dip it into the seed to be studied. One layer of seed will cover the moist surface. With a lens or reading glass in the right hand the seed may be carefully examined for impurities (Figs. 10 and 11). PLANT IMPROVEMENT, GOOD SEED 25 EXERCISE. — Identifying Weed Seeds. — The figures in U. S. Farmers' Bulletins 260 and 382 will help to determine the names of the weed seeds not known by the pupils. Let students cut out the figures and paste them on a card for quick reference. If the school has a collection of weed seeds in small bottles (Fig. 15), they may now be used to help identify the unknown seeds. EXERCISE. — To Compare Good and Poor Lots of Grass Seeds. — Take a piece of clean window glass and wet it with water. Spread on it a thin layer of blue-grass or of red-top seeds. Hold the glass between you and the bright light. Notice how many of the glumes or husks are hollow. Com- pare in this way a good sample with a poor one. Note the difference in the amount of chaff. Seed Analysis. — The methods of studying seeds outlined in two preceding exercises may be called seed analysis. The sieves mentioned before may also be used in analyzing a sample of seed as well as in aiding in the cleaning of large quantities. Seed Testing. — Another way to detect impurities in seeds is by sprouting a sample of the seed and then observ- ing the differences in character of growth; they may differ in the shape or number of seed leaves, or in manner of coming out of the seed coats. Another reason for seed testing is to determine the vitality or germinating power of the sample. There are several advantages of knowing the vitality: 1. It will save us buying poor seed if we test a sample before buying. 2. If the test is low we will not use the seed at all, even if we own it. 3. If it is as good as we can get we will plant enough more seed than usual to allow for the reduced vitality. 4. Thus knowing how much to plant, will save us the time, labor, and expense of replanting a crop after the first planting shows a poor stand. 26 PRODUCTIVE FARMING 5. The first planting being made with good seed will give us a good even stand at the proper season, instead of too late. 6. This means a better harvest and good return for labor expended in cultivation through the season. Methods of Testing Seeds. — When seeds are to be tested they must be given proper moisture, warmth, and air; these must not change much during the test. A warm living room is about right if the moisture is held close about the seeds. A common way is to take two lots of one hundred seeds each; these are planted in a shallow box of moist sand. Another good way to test seeds is to place them in pans or deep plates between wet blotters or layers of wet cloth (Fig. 12). The plates are placed one above another as high as desired. A label is made for each lot of seeds by using pencil and paper, thus: Date — February 10. Number of seeds 100 Kind '. . . Red clover Number sprouted 90 Per cent of good seed 90 Folds of wet cloth may be made. A lot of seeds with its label is placed in each fold. This is carefully placed in a cov- ered pan in a warm place. If a hundred seeds are taken each time, the per cent of germination is more exactly expressed. EXERCISE. — Test Seeds. — Have grains and garden seeds brought to school. Have them counted, labeled, and tested by each method described here. Winter and early spring are good times to make such trials with seeds. EXERCISE. — Size of Seeds. — From a large package of radish seeds, select 100 of the largest, and another 100 of the smallest. Make sprouting tests of these two lots, by planting them in a shallow box of moist sand or soil. Keep them in separate rooms, and label them. Does the result show that gardeners should select large seeds? Could this be done with sieves? PLANT IMPROVEMENT, GOOD SEED 27 Buy the Best. — It seldom pays to buy cheap seeds. The age, size, weight, purity, and vitality should be determined when buying. Protect seeds from mice, insects, and moisture. Cheap seeds are sometimes mixed with better seeds if the two kinds look much alike. Old seeds which have nearly lost their life are sometimes made fresh looking by using fumes of sulfur. These are then mixed with good seeds and sold. Such mixtures are called adulterations. FIG. 12. — A convenient home apparatus for testing seeds. The seeds are germi- nated between wet cloths or blotters. The plates help to hold the moisture (Agricultural Education.) Immature seeds are those not fully ripened; such seed cannot sprout well. To sprout under ordinary field con- ditions, the seed must be fully matured. SECTION ON WEEDS The Weed Nuisance. — One of the greatest hindrances to good farming is the presence of weeds in the fields. Weed seed is in. the soil, in the grain, grass seed, and nearly all farm seeds (Figs. 13a and 6). There are thirty or more un- desirable weeds to be found in clover seed and alfalfa seed. The grass seed is too often full of bad weed seed. There is no place on the farm where weeds are a greater enemy to our success than in the grass fields. It is harder to get rid of them there than from the fields where we are doing some tilling. But most of the weeds found in the pastures and hay-fields have been sown there or near there by some farmer, at some time in the past. Some weed seeds are sown from fence rows by the wind. 28 PRODUCTIVE FARMING Examining for Impurities. — Weed seeds and other im- purities can usually be seen with a common reading glass or pocket microscope. The proper thing to do is to examine seeds before buying them, and avoid spending money for weed seeds to sow on the farm. At least let us look at the seed before sowing it (Fig. 14). Weeds have been briefly defined as "plants out of place. r' This is a satisfactory meaning of the term, for many plants that are grown for the uses of man are objectionable when 6 FIG. 13o. — Hay-field filled in late summer with wild carrots or Queen Anne's lace. FIG. 13b. — Hay- field "taken" by dandelions. found among other crops. Rose bushes sprouting in a corn- field are called weeds. Likewise corn in a rose garden is considered as a weed. Noxious weeds, however, are those plants which are very frequently found in fields, or gardens, or other undesirable places. Classification. — Weeds may be grouped, according to the length of life, into annuals, biennials, and perennials. Annual weeds bear blossoms and seeds the first year and then die entirely. This group includes many of our most abundant weeds, such as rough pigweed, lamb's-quar- PLANT IMPROVEMENT, GOOD SEED 29 ter, Russian tumbleweed, the large sunflower, horseweed or fleabane, ragweed, Spanish needles, buffalo bur, purs- lane, cocklebur, corn cockle, mustard, chickweed, and field dodder. The annual weeds are more commonly found in with annual crops such as grain, corn, potatoes, and garden annuals; this is chiefly because the weed seeds sown each year by the plants find ready lodgment in the freshly plowed or cultivated fields and gardens. FIG. 14. — Seeds mounted in holes in heavy pasteboard between two pieces of glass held with paper binding. A tripod lens used for seed study. (Agricultural Education.) One of the easiest ways to get rid of a bad field of annual weeds is to rotate the crops by thickly seeding the field to clover or grasses. Annual weeds are seldom found in such fields, particularly after the first cutting of the hay. Biennial weeds are those plants which live two years, the first year making a vigorous growth and storing some nourishment, but bearing no blossoms nor seeds until the second summer. There are not many common kinds of weeds in this group. Burdock, teasel, bull thistle, wild carrot (Fig. 13a) and parsnip are common biennial weeds. Perennial weeds live several years and bear blossoms 30 PRODUCTIVE FARMING and seeds each year. The roots or underground parts live over from year to year, and usually new leaves and stems are sent up from the old roots in the spring. Such weeds are most commonly found in pastures, hay-fields, lawns, roadsides, and fence rows. They grow in places where their roots may live undisturbed in the soil from year to year. Because of this we may conclude that rotation of crops will help destroy them. When a hay-field is plowed and harrowed for corn, nearly all kinds of perennial weeds are killed. Examples of perennials are: Canada thistle, quack or couch grass, Johnson grass, curled or yellow dock, smart- FIG, 15. — Seed samples in wooden case, bottles held in place with shoestring. (Agricultural Education.) weed, dandelion (Fig. 136), golden hawkweed, milk-weed, nut sedge, ox-eye daisy, rib-grass plantain, wide-leaved plan- tain, red field sorrel, toad flax, white and purple fall aster, wild garlic, chicory. Persistent Weeds. — Among the perennial weeds those which are most troublesome are either provided with (1) a rapid means of spreading, or (2) a fleshy root or bulb. Those with runners which take root a-t the joints are seen in some grasses, as Bermuda grass, and the trailing white clover, and the running buttercup. Some have underground running rootstocks that send up new shoots at the joints, as Johnson PLANT IMPROVEMENT, GOOD SEED 31 grass, quack or couch grass, red field sorrel, Canada thistle, and toad flax. Examples of bad weeds with fleshy under- ground parts are : wild onions, garlic, curled or yellow dock, dandelion, and many others. Fighting Bad Perennial Weeds. — There are several methods of fighting bad perennial weeds such as those men- tioned in the preceding paragraph. 1. In most cases the best method of fighting persistent weeds is to practice very frequent tillage to prevent exposure of the green leaves to the sunlight. This method is eco- nomical when there is a crop on the land which is benefited by frequent tillage, as corn, cotton, and garden crops. 2. In some cases a dense growth of grain, millet, alfalfa, or other close-growing crop may be effective in choking down or smothering the weeds 3. Smothering of small patches of weeds is sometimes accomplished by means of straw stacks placed over them. Tar paper may be used in some cases. 4. Sheep in pastures will crop down many weeds and keep them under control. Hogs confined in small areas will root .out many bad kinds of weeds and completely destroy them. In small poultry yards weeds are kept in complete subjec- tion by fowls eating off their tops closely. 5. Frequent mowing of pastures, meadows, and yards will aid materially in checking certain kinds of bad weeds. It makes the grass grow better and retards asters, chicory, plantains, hawkweed, dock, and many others. 6. Chemicals are sometimes used on the crowns and roots of weeds hi yards, walks, roads, or where only a few weeds have started. Chemicals used for this are salt, copper sulfate, iron sulfate, kerosene, carbolic acid, and others. Salt on the bad weeds in pastures often causes the cattle and sheep to eat them down to get the salt. Spraying Weeds. — Annual weeds, such as wild mus- tard, corn cockle, and others that are bad in grain fields are 32 PRODUCTIVE FARMING often controlled by spraying with iron sulfate before the grain begins to send up its stems. The principle involved in this method is this: The leaves of most grain crops and grasses are naturally protected by a coating of wax or "bloom" which keeps off the chemical and prevents their injury. The weeds when young are tender and not thus protected. Hence the chemical may be made strong enough to kill many kinds of weeds without killing grasses or grain crops. EXERCISE. — Collecting Weed Specimens. — In the -fall of the year a collection of weeds should be made by the student. One set of the specimens should be kept at the school. They may be dried by spreading out the plants between large folded newspapers. Put the pile of papers and plants on the floor; place over them a board and stone or other heavy object. This pressure will drive the moisture from the plants into the papers. Change the papers from day to day until the plants feel quite dry. They may then be fastened to sheets of paper or cardboard eleven by seventeen inches. Find the names of the weeds from any one who knows them, group them into annuals, biennials, and perennials. U. S. Farmers' Bulletin 28 will be of much help in the study of weeds. EXERCISE. — Seed Collection. — Let the pupils bring to school hi the fall such weed seeds as they can find upon the known weeds. These may be carried hi small papers or old envelopes on which the name of the plant is written. These may be transferred to small bottles as in Fig. 15, or to holes in a seed board made like the one shown hi Fig. 14. A col- lection of farm and garden seeds should also be made for the school to use. Common Weeds. — An alphabetical list of some bad weeds, with useful information regarding them is given in the table. (A = annual, B= biennial, P = perennial.) (Adapted from H. R. Cox, U. S. Department Agriculture.) Description of Common Weeds. Common name, botanical name, and duration of life. Color, size, and arrangement of flowers. Method of seed distribution ; vegetative propagation of the perennials. Place of growth and products in- jured. Bindweed, field bindweed White or pink; 1 Grain and flax Rich moist soils; (Convolvulus), P. inch; solitary. seeds; creeping grain and hoed roots. crops. Bull nettle, horse nettle Purple; 1 inch; Plants rolled by Everywhere; grain (Solanumcarolinense) ,P. solitary. wind; running and hoed crops, roots. pastures. Chess, cheat (Bromus seca- linus), A. Green; spikelets in panicles. Grain seed, espe- cially wheat. Every where; grain fields. Chickweed, common chick- White; | inch; In crop seeds; has Meadows, lawns; weed (Alsine media), A. cymes. a long seeding winter crops. period. Cocklebur, olotbur (Xan- Green; . | inch; Carried by ani- Cultivated fields thium americanum), A. head. mals. and waste places; hoed crops and wool. Crab-grass (Syntherisma Green; spikes.. . Clover and grass Cultivated fields, sanyuinale), A. seed, hay, ani- gardens, lawns; mals. hoed crops. Daisy, oxeye daisy (Chrys- White with yel- Clover seed, hay; Pastures.meadows, anthemum leucanthe- low center; 1 woody, rather roadsides; hay, mum), P. inch; heads. short rootstocks, pasturage. but largely by seed. Dandelion (Taraxacum offi- Yellow; IJmch; Wind; taproot, Lawns, meadows, cinale), P. head. which spreads waste places; but little. ha,y and lawns. Dock, yellow dock, sour Green; 1 inch; Hay and straw, Hay, small grain, dock (Rumex crispus), P panicle. clover and grass and hoed crops. seed; taproot, which spreads but little. Fleabane, horseweed (Eri- White; i inch; Hay, grass and Meadows, pastures geron canadensis), A. heads in cymes. clover seeds. and grain fields. Foxtail, yellow foxtail, Green; spikes.. . Animals, hay, Land cultivated in pigeon grass (Chcetochloa grain, and grass early part of glauca), A. seeds. season; young grass and clover seedlings. Lamb's-quarters, pigweed Green; very Grain and grass Grain fields and (Chenopodium album), A. small; panicle. seed. hoed crops. Lettuce, prickly lettuce Yellow; J inch; Wind Everywhere; all (Lactuca virosa), A. heads in pan- crops. icles. Pigweed, redroot, careless weed (Amaranthus retro- Green; quite small; spikes In grain and grass seeds; plants Plowed land; hoed crops. • flexus), A. in panicles. blown by wind. Plantain, buckthorn, rib- White; ^ inch; Hay, clover and Everywhere; grass (Plantago lanceo- spike. grass seed; meadows, pas- lata), P. spreads but tures, and lawns. slowly from a crown. Poison ivy, poison oak (Rhus toxicodendron), P. Greenish white; | inch; pan- Does not spread fast by seeds ; Moist rich land, along fences; icles. running root- poisonousby con- stocks. tact. Purslane, pusley (Portu- Yellow; J inch; Implements; has Rich cultivated laca oleracea), A. solitary. a long seeding land, gardens; period. hoed crops. Ragweed, smaller ragweed (Ambrosia elatior), A. Yellow; J inch; small heads on Wind carrying matured plants; Everywhere ; grain stubble ; spikes. in grain and red- hoed crops, grass clover seeds. seeding. Sorrel, sheep.sorrel, horse sorrel (Rumex acetosella), Red ; f inch ; panicles. In clover seed ; creeping roots. Meadows and pas- tures. 34 PRODUCTIVE FARMING REVIEW. 1. Tell of the value of sifting and fanning grain which is to be used for seed. 2. From which plants in a garden should the gardener save seeds ? 3. Describe the ear-row method of improving eorn. 4. Describe the hill-row method of improving seed potatoes. 5. Tell why weeds are so prevalent and give a remedy. 6. Why should farm seeds be examined before they are purchased or sown ? 7. Tell how to analyze a sample of clover seed. 8. Tell how to mount a sample of grass seed to study its value. 9. Give a number of advantages from knowing the vitality of seeds. 10. Describe the plate method of seed testing. 11. Describe some other good method of testing seeds. 12. Tell of some ways in which seeds are sometimes adulterated. 13. What are immature seeds ? Why not plant such ? 14. Tell how seeds should be stored,, 15. What are noxious weeds ? 16. What are annuals ? biennials ? perennials ? 17. Where are annual weeds most commonly found ? 18. In what places are perennials most commonly found ? 19. Name several annual weeds. 20. Name several common biennial weeds. 21. Name all the perennial weeds you can. 22. Name some of the most persistent weeds. 23. How are they propagated? 24. Name several methods of fighting bad weeds. 25. When and with what are weeds sometimes sprayed? 26. Of what value is a collection of weed specimens in school? 27. Why should every one know the common weeds? 28. Would a collection of seeds properly labeled be of use in school? Why? References. — U. S. Farmers' Bulletins: 382, Adulteration of Forage Plant Seeds; 428, Testing Farm Seeds; 660, Weeds. PROPAGATION OF PLANTS WITHOUT SEEDS 35 CHAPTER III. PROPAGATION OF PLANTS WITHOUT SEEDS. The Raising of Fruit Trees. — Plants propagate them- selves naturally either by seeds or by buds. One or both of these natural methods is used by the farmer for all plants and crops. Very few fruits "come true" from seed because the seeds are formed by cross-pollination. The pollen is carried by insects and wind from other varieties. For this reason the nurserymen, who produce the young fruit trees or bushes, must avoid the use of seeds. With such fruits seeds may be used in an effort to secure new varieties, or to pro- duce stocks on which to grow the improved varieties; but the standard sorts are multiplied by some form of bud propagation, such as grafting, true budding, layering, and making cuttings. Propagation of Apples. — One common method for the production of young apple trees involves the use of grafting. It is called the root-grafting process. First. — Seeds from cider-presses are planted in garden rows and the young trees cultivated for one summer to get the greatest growth possible. These trees would probably never bear good apples if they were allowed to reach matu- rity, but they serve admirably as the stocks on which to grow good trees. They are taken up roots and all, in the fall, tied in bundles of one hundred each, and well stored in moist- ened sawdust in a very cold cellar. Second. — W7ell-matured shoots of one-year wood are cut for scions from the tops of good specimens of apple trees of the varieties we may wish to propagate. These are properly labelled, tied in bundles, and stored in the same manner as the seedling trees. This is done in late fall. 36 PRODUCTIVE FARMING Third. — The actual work of grafting the tops of the desired varieties onto the roots of the young seedlings is to be done during the winter months. This work is done in the cool cellar and the little grafted trees are then tied into bundles and stored until warm spring weather. Fourth. — The little trees are set in good rich garden soil, deep enough to cover the union or grafted point well. The top of the plant with a bud or two will be above the surface of the ground. The dirt should be well tramped around the grafts. Details of Root=grafting. — The tops are cut from the young seedling trees and destroyed. The top-shoots from good trees are inserted upon the roots in their place. The new tops are called scions. They may be only a few inches long and contain from three to six buds. The roots may be either used entire for each new tree; or they may be cut into pieces four to six inches long, and a graft made on each piece. Whip or Tongue Graft.— The kind of graft or union to make for apple root grafts is the one that is known by nurserymen as the tonSlie or wniP graft. This is shown in Fig. 16; A represents the upper end of the piece of root cut so that there is a tongue ready to slip be- neath a similar tongue made in the scion, shown at B. As soon as cut they are slipped together very firmly, as shown at C. Now a piece of waxed knitting cotton is wrapped about the grafted portion to hold the parts snugly together. It is necessary to have the root and scion of the same diameter or nearly so. The cambium, or growing layer, is FIG. 16. — Steps in root-grafting of apples. A, the small root tongue cut; B, the scion with tongue cut; C, the two in place ready to tie with waxed cotton. PROPAGATION OF PLANTS WITHOUT SEEDS 37 just beneath the bark of each. If the cambium of the scion is in perfect contact with the cambium of the root, growth is likely to take place, otherwise they will probably not live. EXERCISE. — Root-grafting. — Let the students have some practice in making root-grafts. Until the method is well learned, it is best to use willow or any other convenient switches to represent the roots and sciuns of apples. The second lesson may be with the real apple roots and apple scions. These may be secured in the neighborhood or from any nurseryman. For this exercise and the exercise in budding any wide thin-bladed pocket knives will do if better ones are not available. Have them very sharp. EXERCISE. — Making Grafting Wax. — Melt together in a tin can or pail one pound of rosin, one-half pound of beeswax or paraffin, and four ounces of tallow; when well melted and mixed allow the mass to cool a little and then pour it into a pail of cold water. Let one or two pupils rub tallow on their hands, work and pull the mass, as they would pull candy, until it is of a light yellow color; make it into rolls and lay on a sheet of greased wrapping paper to harden. EXERCISE. — Waxing Cotton for Grafting. — While the wax is melted, in the preceding exercise, put into it for a few moments a ball of No. 18 or No. 20 knitting cotton. Remove it and let it cool on a sheet of greased paper. Pieces of this six or eight inches long will be used to wrap around each root-graft and may be used in the budding exercises. Budding Apple Trees. — New apple trees of the preferred varieties may be propagated by budding. This method is now quite common among nurserymen. The young seedling trees for stocks are grown in good soil for one season, or until August, from seeds sown the preceding spring. Scions or bud sticks are taken from the new growth on trees we wish to propagate. This is done in August or early September. The leaves are all clipped off leaving about one-half inch of each leaf stem on the twig to serve as bud 38 PRODUCTIVE FARMING handles. The budding is done immediately. One bud froR the budding stick is inserted just under the bark of the little seedling tree a few inches above the ground. How to insert the bud will be described under "Budding Peaches." The little seedling is not disturbed in this method of propagating apple trees. The roots are left growing in the soil. The new bud becomes united to the surrounding tissues that fall. All the top above the bud is pruned away (Fig. 17) just as soon as the new bud starts growth in spring, and all the natural buds of the seedling stock are rubbed off. Then the new bud makes a vigorous growth and is soon devel- oped into the new tree top. Another method is to insert the buds of the desired varieties in the little seedling trees the following- spring. In this case the scions are taken when dormant and stored in a cold cellar until about June. This method is quite common in some sec- tions, particularly where the hot, dry weather of August would be injurious. After one season's growth the most vigorous budded or root-grafted trees are ready to transplant to the orchard. They are then called one- year old trees. Many apple growers prefer to leave them in the nursery one more year, and always select two- year-old trees for the setting out of new apple orchards. Budding Peaches and Plums. — Improved varieties of peaches and plums are propagated by budding. Stocks for this purpose are usually started from pits of native or seedling peaches and plums. Special kinds of stocks, however, are desired for a few particular varieties of plums. FIG. 17. — Method of pruning a budded tree after the new shoot starts. PROPAGATION OF PLANTS WITHOUT SEEDS 39 The pits of peaches and plums are hard to start into growth, the shell is too hard for the germ to burst through. They must be frozen over winter or cracked by hand. Fre- quently layers of peach pits are covered with a little sand in shallow boxes. This is called stratifying the pits. These are left exposed to the weather over winter. The action of the frost should crack them. In spring they are to be planted in rows three feet apart in rich garden soil. They are given thorough tillage until August, when they are to be budded. Fio. 18. — Method of budding a young fruit tree. A, the bud and ; surrounding parts cut from a good variety; B, the T-shaped cut in bark of tree to be budded; C, the same rolled back ready to receive the good bud; D, the good bud set in place under bark; E, the bud and bark tied securely in place with waxed knitting cotton or with raffia fiber. Peach and plum scions or budding sticks are cut from the new growth on the trees of the desired varieties. The leaves are trimmed off, but stems are left near each bud to aid in handling when the bud is removed from the scion.. The buds are inserted on the stocks right away. The oper- ator must get down close to the ground to do the work properly. The top of the seedling stock is cut away early the following spring before the buds swell. This forces all the sap of the root system to the new bud and the growth will be rapid. One-year-old trees of peach and plum varieties 40 PRODUCTIVE FARMING should be transplanted to the orchard. If left in the nur- sery rows longer than for one year's growth from the bud, they are likely to become misshapen or overgrown and will be undesirable trees for the orchard. How Budding is Done. — A good, healthy bud is cut from the scion with the bark surrounding it in the form of a shield (Fig. 18, A). A cut is now made through the bark of the stock, in the form of a letter T, shown at B; this is pref- erably done on the north side of the stock to avoid the hot sun. Turn back the edges of the bark as shown at C. Insert the bud into its new home just under the bark as shown at D. The top of the shield must be as low as the top of the T. Tie the bark down tightly over the edges of the shield as at E; waxed knitting cotton, No. 18 or 20, may be used for this, as it will not grow into the bark and stop circulation; raffia fiber is also good for this purpose. EXERCISE. — Practice in Budding. — Twigs from willow trees may be placed in water in a warm room in the winter and the bark well loosened in a few days. Use these to practise the method of budding just described. Top=working of Trees. — Tree tops may be changed from one variety to another. If an apple tree bears poor fruit it may be changed to bear good apples. This is done by top-working, as it is called. Many branches are cut off the poor tree, and in their places may be inserted new buds or grafted new scions of the variety desired (Fig. 19). This FIG. 19. — Cleft-grafting a fruit tree. The tree is severely cut back and good scions are grafted on. The boys are top- working the tree. PROPAGATION OF PLANTS WITHOUT SEEDS 41 work is often done in June with scions held dormant in the cellar; or it may be done in August with scions of the current year's growth. Top-working is accomplished by one of three methods: budding, or tongue-grafting, or cleft-grafting. The first two methods have been described. Cleft-grafting is now less commonly used. (For a description of this method reference is made to U. S. Farmers' Bulletins 157 and 408.) Tip=layering.— This is the most common way of propa- gating black raspberries. The soil is cultivated at both sides of the raspberry row, and in late July or August the tips of the long canes, or stems, are bent to the ground and slightly covered with soil (Fig. 20a). They will send down roots and FIG. 20a. — Tip-layering. The young plant has taken root. FIG. 20b. — Vine-layering. The young plants are ready to be cut epart. develop new plants. The canes are cut loose from the young plants, which may then be transplanted to a new garden. Vine=layering. — Several kinds of vines, including certain varieties of grapes, are propagated by layering (Fig. 206). A shallow furrow is made and a vine is laid in it and parts of it covered with soil with other parts exposed to the light. Shoots will start up and roots will be formed. The new plants may be cut apart with a spade; they are then ready to transplant to desired places. Mound=layering. — This is used for the propagation of gooseberries, quinces, and many ornamental shrubs. The earth is mounded up around the lower branches, which will then send new roots into the soil (Fig. 21). The following PRODUCTIVE FARMING FIG. 21. — Mound-layering. The soil is mounded among the shoots, and new roots will be formed. fall or spring the plants may be dug; the branches with their new roots will form new plants; then they are cut away from the parent plant. Division of Plants. — Some plants naturally form roots from the lowest parts or send up new shoots near the parent stalks. After the plant is dug it becomes an easy matter to pull or cut the parent plant into a number of smaller plants. This method of propagation is used in multiplying purple lilac, rhu- barb, asparagus, and many shrubs and herbs. Cuttings. — There are a few fruit plants and many others that can be propagated by cuttings. Currants, gooseberries, and several kinds of grapes may be multiplied by cuttings of the ripe wood. Blackberries are propagated by root- cuttings, — pieces of the roots dropped in a furrow and en- tirely covered. Many kinds of houseplants will grow from slips or cuttings of green wood; these are sometimes called soft-wood cuttings. Cuttings of ripe wood, six inches or more in length, should be taken in the fall after the leaves have dropped. FIG. 22. — Four forms of grape-vine cuttings. A, single eye or single bud; B, two buds; C, heel cutting; D, cutting. mallet They are cut from the new- est growth, and the strongest shoots are selected (Fig. 22). When tied into bundles they should be properly labelled and stored in damp sawdust in a cold cellar. In late spring they are set in deep furrows in rich garden soil with one PROPAGATION OF PLANTS WITHOUT SEEDS 43 or two buds showing above ground. The soil must be pressed firmly about them (Fig. 23). In the case of grape cuttings one bud only is left projecting above the surface of the soil. EXERCISE. —Starting Slips at Home or at School. — In a shallow box of moist, clean sand, plant a number of cut- tings of several house-plants. Keep the box in a warm room and water the soil frequently. These slips are made by taking a few inches of the healthy shoots and removing a large portion of the older leaves. For this exercise many forms of winter house- plants may be tried — begonia, carnation, geranium, fuchsia. After the slips have formed roots in the sand, they may be transplanted to rich soil in well-drained pots or boxes. FIG. 23. — Cutting of red currants, showing depth for planting, allowing one or two buds to protrude. REVIEW. 1. What are the two general plans by which plants naturally prop- agate themselves? 2. Name four forms of bud propagation used by nurserymen. 3. Describe the starting of stocks for the budding or grafting of young apple trees. 4. Tell when to take scions and how to store them for winter root- 5. When are root-grafts set out? and how? 6. Describe the details of root-grafting. 7. What is the cambium layer? Where is it? 8. Tell how to make grafting wax and how to wax knitting cotton. 9. What are used for stocks and for scions in the budding of young apple trees? 10. At what two times of year is apple budding done? 11. Tell how peach and plum stocks are started. 12. When are peach scions cut from the trees? When is the budding usually done? 13. What is the purpose of top-working old trees? li, How is this done? 44 PRODUCTIVE FARMING 15. Describe tip-layering of black raspberries. 16. Describe vine-layering for grapes. 17. What is mound-layering? 18. Describe the cutting, storing, and planting of grape or currant cuttings. 19. What plants may be propagated by soft-wood cuttings? Reference.— U. S. Farmers' Bulletin 157, The Propagation of Plants. CHAPTER IV. HOW SOILS ARE FORMED. THE soil is one of those common things most of us think very little about. We see it every day, we walk on it, we eat and wear its products, but we very seldom give it a thought. It may even surprise some of us to know that we get from the soil not only our food, our houses and our cloth- ing, but that all animal life comes indirectly from the soil. For every living thing comes originally from two primary sources, the air and the soil. All elements or substances found ill plants or animals are from either the soil or the air. The foods which plants secure from the air are too abun- dant to ever become exhausted by large farm crops. No human efforts are required to make them available to plants, except for the securing of nitrogen from air, when inoculation with certain bacteria may be necessary. The foods taken from the soil on the other hand are much less available, and the ability of plants to secure them may depend very largely on the efforts of the farmer. It is necessary for the farmer first of all to study his soil to see how he can make its plant- food most available. What Soil is. — That part% of the earth's surface which can be tilled, and in which plants grow, is called soil It is the loose, highly decomposed layer of mineral matter result- HOW SOILS ARE FORMED 45 ing, primarily, from rock decay, which furnishes food and foothold for plant and animal life. Soil Builders. — Soil is derived from two main classes of substances; rock and organic matter. Rocks crumble into fine particles. They are gradually being changed into soil. Plants and animals decay to form the organic matter or humus in the soil. The humus present in our fields is chiefly of vegetable origin. FIQ. 24. — A high bank of wind-blown soil. Notice where it has nearly covered the fence. (Plant Industry.) How Soils are Formed. — Certain forces are constantly at work changing rock into soil and making soil particles finer. These forces are: (1) air; (2) water; (3) temperature; (4) plants; (5) burrowing animals; and (6) minute plant and animal organisms. These forces act both physically and chemically. EXERCISE. — Soil Forming. — Find places near the school or at home where any of the agencies mentioned are at work forming soil. Tell of the places and what you have seen. Can you find places where water has carried soil? How are the little gulleys formed in hillsides? Where is the soil carried to? 46 PRODUCTIVE FARMING The Action of Air and Temperature Changes. — The action of the air and the changes in temperature, which together we call weathering, is of many kinds. The heat of the sun causes the rock to expand. As all of the substances which make up a rock do not expand the same amount, the rock breaks and the particles flake off the surface. In regions where the soil is not protected by vegetation the wind becomes an import- ant soil former (Fig. 24). The particles of soil are caught up by the wind and hurled against rocks and against cliffs, and grind the surface of the rocks and undermine the cliffs. This FIG. 25a. — A little stream falling many feet will wear away the hardest rock. The fine particles help to make up the soil. (Plant Industry.) FIG. 256. — A muddy water-fall. Soil is carried by swift current to the low land. little agent does a rea. y large work. Then there is a chemical action of the air, in which certain substances in the air, as oxygen and carbonic acid, unite with certain substances in the rock and cause it to decompose. Such an action of the air is termed oxidation and is a slow burning or decay. A good example of weathering may be observed in the rapid crumbling of shale on exposure to the air. In such cases the air, temperature, and water each play an important part. EXERCISE. — The Action of Air on Iron. — A familiar HOW SOILS ARE FORMED 47 illustration of oxidation is seen when iron is exposed to the air; the red rust that forms is an oxide of iron — a substance very different from the iron itself. To test for ourselves the action of air on iron we may take a piece of bright iron or steel, as the blade of a knife. Cover one end with linseed oil or wagon grease, and leave the other end exposed to the action of rain and air for a few days. Notice the effect on the exposed part. What lesson on the care of plows and other farm tools may we learn from this? r - ' "~^ FIG. 26. — Abroad valley of rich alluvial soil. This soil at some time was chiefly part of the surrounding hills. (Plant Industry.) Water is the most powerful agent in decomposing or breaking down rock (Fig. 25a). Its action, especially in dis- solving rocks, is very important. Nearly all rocks are more or less affected by this action, and some, as limestone, are easily affected. W'ater breaks up rock by freezing. Most rocks contain cracks or openings into which the water readily flows; when the water freezes, it expands and forces the rock apart. Solid rock is thus gradually broken to pieces by the freezing 48 PRODUCTIVE FARMING and thawing of water in it. This force is especially active in cold climates. EXERCISE. — To Show the A dion of Freezing Water. — Fill a small bottle with water and place it where the water will freeze. The bottle will probably be broken by the expansion due to the change in temperature. Water also makes the rock particles finer. After rains the flowing of water grinds the fragments together. The force of running water is continually wearing them smaller (Fig. 256) . The finest particles are first carried away by the water to valleys below (Figs. 26 and 27). FIG. 27. — A rocky hill changing into soil. The soil is gradually carried to the valley by rains and irountain streams. (Plant Industry.) Water in the form of glacial ice, carrying sand and boul- ders frozen into the under side, wears down the rocks over which it passes and carries the material with it (Fig. 28). The effects of plants in the rotting of rocks are of two kinds: (1) The roots grow into the crevices found in rocks. This in time forces the rock particles apart (Fig. 29). Roots of trees often lift large rocks and cause them to crack by their own weight. This aids the rocks to crumble into soil grains. (2) When the plants decay acids are formed, HOW SOILS ARE FORMED 49 that help the water to soften or dissolve the rocks. Every •one has seen rocks covered with lichens and mosses. When these are taken away one can often see where the rocks have been eaten into by the small plants, due to the action described. As this process of growth and decay continues for Ages, the soil is gradually improved until it will produce plants useful to man. v><* V* r V' „ r yvVf'^WWfSm .. ' .(/ f /' •.•;-'; ;":--.• •>.::/: :-:-W . '.-'/.; ••f-,^^ -.-'.: . ',;•.-•.-' '.---••-•• v-':.:-'-.:i:..'--\".-.''.' * * jrw X • :•-•-.•;>',••, •'-.•-.''•'.•v.-'.-r->v:-..-.'.^j3r.-r.- :;-•;••/;•• •-. •. -. •..-'•; .;-.-.-.'v ^^^ •.•;-•"., *'^'Sil»BiasI>iis psapfit Fio. 28. — View of Victoria glacier, several miles in length. S, mountain snow; D, dirt and broken rock carried by the moving snow and ice; L, broken rock where Hie moving glacier rubs the bank or side of the valley; C, central line of dirt and rocks brought by the edges of two moving streams of ice and snow: T, terminus or -end of the glacier where the sun melts the snow and leaves the rock and soil. The finest soil is carried by running water to the broad field farther down the valley. How Animals Help. — Burrowing animals, such as the ground squirrel and the prairie dog, earthworms and insects living in the ground, as well as rabbits, gophers, and wolves, .aid in preparing the soil for the growth of plants. They often burrow deep into the ground; the openings aid in free movement of air and water, and roots can enter the soil more 50 PRODUCTIVE FARMING easily. The animals also drag into their homes nesting mate- rials and other vegetable matter. When this decays it aids in forming fertile soil. How Soils are Moved. — The same forces that form soil also carry it away. Soil is almost constantly moving from high lands to low lands. It is deepest in the valley, and thinnest at the top of the hill. Great furrows are formed in the hillsides after heavy rains. The swollen and muddy streams carry the soil to lower parts of the land. When rivers overflow, they always leave a deposit of soil which was carried by the water. Transported soil is any soil moved from the place where it was formed. It is described by different names or terms, depending on the means by which it was transported; and these different means of trans- portation leave the soil in very different condition as regards its general nature and appear- ance and use for growing crops. Go out into a plowed field after a heavy rain and see where little gulleys have been worn. Follow one of these and see how much soil was carried by the water that ran off. Notice the size of the particles that were carried. Soil deposited by water is called alluvial. It is found in valleys and river-beds, beds of old lakes, ponds and marshes. (Fig. 26.) Soil deposited from ice is called drift soil. It has been formed by the action of glaciers, which are large bodies of FIG. 29— A large rock split by the growth of a tree near Lansing, Mich. HOW SOILS ARE FORMED 51 ice moving like rivers, carrying quantities of earth and rocks. The results of ancient glacial action are found in many places. Rocks with deep scratches show the wearing and grinding effects of the moving masses of ice. Drift or glacial soil is easily recognized by the presence of rounded rocks or boulders. It is usually fertile because of the variety of mineral substances brought from far and near. Much drift soil is found throughout the northern states and Canada, east of the Rocky Mountains. Two other kinds of transported soil should be studied. One, known as colluvial soil, occurs on mountain slopes and steep hillsides, and is the mixed mass of soil and rocks brought down by avalanches and landslides. Such soil is not generally in condition to grow good crops. The other, known as wind- drifted or aeolian soil, is found in arid or semi-arid regions, that is, in places where there is very little rain-fall and the soil is dry, and there is little vegetation to hold the soil. This soil is carried by the winds and is deposited in dunes or drifts like snow. These dunes sometimes cover cultivated fields, forests, and even villages. As this soil is shifting, plants frequently do not have an opportunity to grow and hold it. (Fig. 24.) REVIEW. 1. What is soil? 2. From what is soil made ? 3. Name four forces which are making soil. 4. How does the air help to make soil ? 5. Tell of the influences of temperature in crumbling rocks. 6. Tell of the ways in which water helps to crumble rocks. 7. Tell where and when you have seen running water carrying fine soil or mud. 8. In what kinds of places is this mud deposited ? 9. Do plants help to form soil ? How ? 10. In what ways do animals help to make soil useful ? 11. What is transported soil? 12. Describe the several kinds, and tell where they are likely to be found. Reference. — U. S. Farmers' Bulletins: 421, Control of Blowing Soils. 52 PRODUCTIVE FARMING CHAPTER V. KINDS OF SOILS— THEIR CHARACTERISTICS. SOILS used in the production of crops are of many kinds. Some of these differ widely from each other in their physical nature and in their ability to produce good return to the owner. It is the purpose of this chapter to point out the characteristics of the most important types of soil. Kinds of Soil. — Soil may be divided into four natural classes — sandy, loamy, clayey, and peaty — according to the proportion of sand, clay, and vegetable matter which it con- tains. Between these groups or classes we may have very many others, depending on the combinations of these types and the sizes of the soil particles. A loam is a soil intermediate between sand and clay. A marly soil is a combination of clay and fine lime mate- rial. Silt is a soil whose particles are slightly larger than clay particles but finer than sand. We should mention also limestone soils. These result from the crumbling of limestone (Fig. 30). Sandy Soil. — Sand is formed from sandstone. It does not produce large crops, for it is poor in plant-food and moisture. A soil made of sand only would need to be changed a great deal to be of any use in farming, as it would produce no crops in its natural condition. Soil with much sand in it is light and open and allows the entrance of air, and it can absorb and hold little moisture. Sandy soil is so loosely held together that water and air pass through it readily. Crops on such land become parched if the weather is hot and dry. This type of soil dries quickly even when the season is wet. Then large crops may be grown better on sandy soil KINDS OF SOILS— THEIR CHARACTERISTICS 53 than on clay, if enough plant food is provided. Compact and sticky soils produce poor crops in wet seasons. The farmer finds it easy to plow and cultivate a sandy field. It is adapted to quick-growing crops, such as early vegetables; and sweet potatoes do well on such a soil. It may be culti- vated without injury when wet. When it lies over clay under-soil or subsoil it may have a high degree of fertility. FIG. 30. — Peach trees in rocky soil. After the soil is plowed, the rains soon wash the fine soil away through the top of the rocks and leave the surface as shown in the picture. The roots of trees are in the finer parts of the soil and the growth is good. (Experiment Station, N. J.) Clay Soil. — Clay soil is much more finely divided than sand. When wet it is plastic and sticky. The latter property makes it useful for making bricks and tiles. Some farm soils are largely clay; but clay alone does not make a good farm soil and its plant-food is not readily available. Soil composed of as much as forty per cent of clay may be good farm soil, and may be well adapted to the growth of grains and grasses. It should not have over fifty per cent of clay present. The finely divided particles of clay adhere 54 PRODUCTIVE FARMING so closely as to make the access and circulation of air, heat, and moisture difficult; the soil is, therefore, cold and heavy. It is hard to work, and, unless well drained, crops are likely to suffer both in wet and in dry seasons; in wet seasons because the moisture and air do not pass through it readily and the surplus water does not drain away, and in dry sea- sons because the land becomes so hard as to prevent the growth of roots, and the small amount of moisture in the soil is not available to plants because it does not readily circulate. Clay and Sandy Soil Compared. — Clay soil is almost the opposite of sandy soil, in many respects. Grains and larger masses of sand do not stick together; if wet and moulded in the hand, they will soon fall apart. Clay may be moulded into any shape, and is sometimes used for making pottery because the particles stick together when moist. Sand, being open and porous, quickly loses moisture and plant- food. Clay is so compact that it retains moisture and plant- food. Sand admits heated air and soon becomes dry and warm; clay admits air more slowly and remains wet and cold. Because of these differences which make sandy soil easy to work and clay soil hard to work, sandy soil is said to be light and clay soil heavy, while in weight a quart cup full of sandy soil is really heavier than the same amount of clay soil. Both are valuable farm soils when supplied with enough plant-food and vegetable mould, or humus. EXERCISE. — To Show the Difference between Sand and Clay. — Use rather pure sand and pure clay. Make a wet ball of each the size of a hen's egg. Place the two wet masses on a board to dry. When dry, examine and note the dif- ferences. . Which ball dried more quickly? Which is harder to work when dry? EXERCISE. — To Compare the Water-holding Power of Sand, Clay, and Loam. — In three boxes about the size of cigar boxes place respectively some sand, clay, and black KINDS OF SOILS— THEIR CHARACTERISTICS 55 loam, which we have learned is intermediate between sand and clay. Wet all of them equally. Place the boxes in the free air or sun and allow them to dry. Which soil loses its moisture first? Which last? Peat or vegetable matter makes up a large part of some soils, particularly in low places. The vegetable matter may be more or less decayed, and is often called peat. It is found in bogs and marshes and other wet places. When the peat has nearly all decomposed it is called muck. If peat and muck soils are well drained and are supplied with enough lime, they are very productive. They are often used for such market- garden crops as cabbage, onions, celery, and cauliflower. Humus. — Partly decayed vegetable matter in soil is called humus. It has a blackish color. In newly cleared farm soil it is derived from the dead roots and leaves of a former vege- tation. Leaf mould found in forests is largely humus. On farms it is secured by plowing under waste materials such as weeds, stubble, roots, vines, and leaves. Farm manure is valuable for this purpose. Special crops are often grown to be plowed under, and when so used are called green manure. When these rot in the soil, humus is formed. Humus is very useful in all soils. It improves a sandy soil because it increases its power to take and hold moisture, supplies it with plant-food, and thus increases its productiv- ity. It will absorb and retain more moisture than any other part of the soil. It improves clay soil by loosening it, thus helping the circulation of air and moisture. It is less likely to clod and crust. Humus is the main immediate source of nitrogen, so necessary in the growth of all farm crops. In the formation of humus other plant-foods are set free, — but best of all is its improvement pf the structure or texture of the soil, resulting in better drainage, better ventilation, and deeper root growth. Lime in Soil. — When lime is found in soil it is usually in the form of particles of limestone or marble, but it may be 5 56 PRODUCTIVE FARMING in solution in the soil water. It is a valuable substance in soil. It furnishes the important plant-food, calcium. Lime- stone crumbles or dissolves easily and helps to make avail- able other plant-foods in the soil. The lime aids in the decay of vegetable matter and in the formation of nitrates from decaying vegetable matter. It improves the physical con- dition of soil; its presence helps to make heavy clay soil loose and more easily worked and to facilitate the passage of water and air through it. In small quantities it improves sandy soil by causing the particles to adhere more closely to each other, and consequently, to hold moisture better. It prevents harm from acids and certain other poisonous com- pounds in soil. It lessens the injury from certain plant diseases that are transmitted through the soil. Soil contain- ing an abundance of lime is usually of good character. It is easy to work and should be well adapted to grains and fruits. While lime is very valuable in the soil, h is possible for it to become harmful. Too much of it in sandy soil or grav- elly soil is more harmful than in clay soils. It may cause other plant-foods to be liberated faster than they can be used by the crop, and they will be wasted. It may cause the vegetable matter or humus to decay too fast; it may reduce the yield of certain crops, as cranberries, and watermelons which prefer acid soil. A loam is a soil consisting of a mixture of sand and clay and containing humus. If two-thirds of the mixture is sand it is called a sandy loam. If one-half of the soil is clay it is called a heavy clay loam. Soils between these two extremes are called loams or medium loams. When gravel or coarse sand and lime are present in considerable amounts, we have gravelly or limy loam. Loam soil is the best for most farm purposes. Sand, clay, and humus are improved as they become mixed together. Medium loams are the best soils for farming if there is a large amount of humus present. The farmer says, "they KINDS OF SOILS— THEIR CHARACTERISTICS 57 up well." They are usually not too wet nor too dry, They do not bake and crack so badly as the heavy clay soils do. Clods are less likely to form. They hold moisture better than light sandy soils. Corn, cotton, potatoes, fruits, vege- tables, grains, and grasses all do well on the medium loams. Texture of Soil. — The texture of soil is determined by the size and shape of the particles of which it is composed and the way in which these particles are grouped in kernels or crumbs or larger masses. The texture determines to a large Via. 31. — Soils of different texture. The coarse or open texture may be improved by tillage and by packing with roller or planker. extent the agricultural value of soil (Fig. 31). It is a fac- tor to consider when studying the composition of soil, as it determines largely the capacity of soil to retain such foods as may become available for plants. Soil such as sand is open in texture and freely admits water, which quickly passes downward, carrying soil fertil- ity with it. Open soil is more likely to lose its plant food than a soil that is fairly dose in texture. Clay loams, in re- taining water, also retain their plant-food better. We call them close in texture. An open texture also allows too rapid decay of vegetable matter. On the other hand, a very com- pact soil such'as clay is undesirable. When there is rain it puddles, and neither air nor water can enter and circulate. 58 PRODUCTIVE FARMING When it dries it becomes very hard and unworkable. A good farm soil should be between these two conditions, — open enough to permit the proper entrance and movement of air and water, and yet compact enough to prevent the washing out of plant-food. Farm Soil. — The best farm soil does not belong strictly to any of these classes already described, but is one which is a mixture of sand, clay, and humus in certain proportions. With reference to the proportions of sand and clay present, the useful farm and garden soils may be divided into three general classes, — sandy loam, medium loam, and clay loam (Fig. 31). A perfect soil is one whose physical nature and chemical composition make it best adapted for the purpose or crop in- tended. It contains just enough sand to enable it to FIG. o2. — A subsoil plow has a long . shank, it is used in the bottom of furrows absorb air and moisture in behind a turning plow where the subsoil is too compact, it stirs the subsoil but proper amounts and to does not bring it to the surface. make it warm and easily worked. It contains enough clay to keep it from getting too warm and to prevent too rapid loss of water. Lime must be present to perform its several duties. Humus is there to control the amounts of moisture and air, to furnish nitrogen, and to help produce valuable chemical changes in the soil. There are a few other conditions necessary to provide suffi- cient plant-food. Perfect soils are hard to find. They are also hard to make in any of the known ways of soil-improvement. We usually can make slight improvements in the soils found in nature. Since this is true we must select crops for the farm which are best adapted to the soil found there. The subsoil lies under the soil, which generally occupies the surface six to twelve inches. There are several differ- KINDS OF SOILS— THEIR CHARACTERISTICS 59 ences between soil and subsoil: The soil is usually darker in color because it contains more organic or vegetable matter. It is more easily worked and less compact than the subsoil (Fig. 32). Air and moisture usually circulate in the surface soil better, and its plant-food is more available. The subsoil serves as a storehouse for moisture and with some plants is penetrated by the roots. Its character materially affects the crops grown on the soil. When the underlying rocks have rotted they make the subsoil. When the subsoils have rotted they are more of the nature of the surface soil. FIG. 33. — Teachers and students taking sofl samples and studying soil. (Agricultural Education.) Names of Soils. — In the following list the soils are ar- ranged with reference to the fine and coarse particles they contain: Clay, heavy clay loam, clay loam, loam, sandy loam, light sandy loam, fine sand, medium sand, coarse sand, gravel. The list omits peat and other organic matter. If humus is present in these they are usually of a dark color or black. Lime also darkens the color of soils in presence of vegetable matter. Otherwise the color will vary a great deaL 60 PRODUCTIVE FARMING EXERCISE. — To Show Kinds of Soil and Subsoil. — Have pupils bring to school in small boxes or tin cans samples of different kinds of soil and subsoil of the neighborhood (Fig. 33). The pupils should classify, and name these. Much benefit may come by discussing the relative value of these types of soil and subsoil. REVIEW. 1. Name as many different kinds of soil as you can. 2. How many of these have you seen? Where? 3. What kind of rock forms sand when crumbled ? 4. In what ways is clay soil better than sandy soil ? 5. In what ways is sandy soil better than clay soil ? 6. Name several ways in which lime or limy substances are help- ful to soil. 7. What is humus? 8. How does humus improve sandy soil? How does it improve clay soil ? 9. Describe a good farm soil. 10. How may the subsoil differ from the surface soil ? References. — Physical Geographies will be helpful in the further study of the topics taken up in the chapters on Soils. Let the most advanced pupils in the class read the chapters on soil movement in a good Physical Geography and report to the class. CHAPTER VI. SOIL MOISTURE. Water in Soils. — Many soils contain too much or too little water. The water in soils may be in three conditions: (a) Free water, or that which would flow into a hole dug for a post or telephone pole. (6) Capillary water, or that which tends to fill the small spaces between fine particles of soil, as the oil of a lamp fills the spaces in the wick above the free oil in the lamp. This is called also coarse film or simply film moisture, (c) Fine film water, or that which clings to the surface of each small bit of soil even when it is as dry as road dust. This is called also hygroscopic moisture. If too much SOIL MOISTURE 61 water is present, proper drainage may help; if too little, by adding water or by adding vegetable matter and barn manure, to aid the soil in retaining water, the crops will be improved. Soils with good texture are seldom too wet or too dry. The average rainfall of a certain region may be enough, but the best growth is impossible if the rain is not well distributed through the growing season. EXERCISE. — Three Conditions of Water in Soils. — Fill a glass jar or drinking glass with some fine sand or other loose soil and pour in water until half full of free water. Above the free water the soil wi 11 become wet with capillary water. By stirring the top soil it will become dust like or some dust may be spread on top. The dust, though perfectly dry in appearance, is supplied with fine film water. Just after heavy rainfalls the free water is close to the surface, and falls lower at drier times. Capillary Moisture. — Capillary water clings to the sur- faces of the soil particles and cannot be seen as free water can. When a soil has all the capillary water it will hold, its presence can be felt with the fingers. The color is darker than the same soil when dried in the air. Take a pound of soil fresh from the garden and spread it out on a paper to dry. The next day weigh it and determine how much capillary moisture it has lost. Fine Film or Hygroscopic Moisture. — Dry dust from a road contains a very fine film of moisture on each soil grain. This is too fine to be seen. Put some road dust in the bottom of a glass tube or vial and heat it gently. Moisture will be seen collecting in the top of the tube. This was held in the form of fine films on the soil grains before they were heated. Capillary Moisture Most Useful. — The roots of plants take up capillary moisture. This in turn is supplied from the bed of free water deeper in the soil. Farm crops cannot make direct use of free water. Plants need air in the soil about the roots. Free water would exclude the soil-air, and 62 PRODUCTIVE FARMING also prevent the rise of temperature. Fine film moisture probably does not aid plants in their growth, but will help to maintain life at the time of great drought. Slow-growing plants, such as those found in deserts, may be kept alive by the presence of fine film moisture. Soil Moisture Used by Plants. — Plants use moisture while growing. One ton of a dry corn crop may use up 300 to 600 tons of soil moisture during its growth. The moisture while in the soil dissolves plant-food which it finds there. The plants take up this food in the water they drink through the roots. This all passes up to the leaves of the plant and the surplus water is lost by evaporation into the air. How Capillary Moisture Moves. — When grains of soil are wet with capillary moisture, each grain is covered all over with a thin layer of water. Deep down in the soil near where the free water is found the layers of water around the grains are quite thick. Higher up, the films are less thick. The films about the grains are as thin as the films of soap bubbles. The grains next to the air become as dry as the air itself. But the moisture is constantly moving from the lower depths toward the surface. The power by which this move- ment takes place is called capillary action. It is in the same way that oil will rise in the wick of a lamp. The moisture moves upward in fine-grained soils such as clay more readily than in coarse sand. The openings be- tween soil grains are called pore spaces. If these are rather large the capillary movement of water is slow. Packing the soil grains closer together, as with a roller, will greatly in- crease the rise of water in the soil. This is often done when small grain or grass seeds are sown, to hasten the sprouting of the seeds. Water Holding Power of Soils. — One hundred pounds of each of the following soils, when saturated, held the following amounts of water in capillary form: SOIL MOISTURE 63 held 25 pounds moisture Heavy clay held 50 pounds moisture Cultivated loam held 52 pounds moisture Black garden loam held 81 pounds moisture Humus held 190 pounds moisture ' EXERCISE. — Absorbing Rainfall. — Arrange an apparatus as shown in Fig. 34. Use gravel, sand, loam, clay, and peat, or other soils of the region. Pour water on all of these, keeping the soil covered. With watch or clock note time required in each case for the water to begin dripping through FIG. 34. — Apparatus to show the rate of taking in rain water by five different soils. Cloth tied around the n^uth of the bottles prevents the soil from washing through. (Agricultural Education.) into the glass below. Which kind of soil will take in rainfall most rapidly? Which has the closest texture? What becomes of most of the rain water falling on a compact soil during a heavy rain? EXERCISE. — To Illustrate Capillarity. — Place one end of an old loose cloth in a cup of water and leave the other end outside. In a short time the whole cloth may become wet by capillarity. The water moves along in the fine meshes of cloth. Oil is drawn up in a lamp through the wick by the force of capillarity. 64 PRODUCTIVE FARMING EXERCISE. — To Show Capillarity in Soils. — Tie cloth over the large ends of lamp chimneys and fill with different kinds of dry soils, as shown in Fig. 35. Set them in a dish of water. The water will rise in the soils by capillarity. It will rise much higher in the finer soils such as clay and loam. Moisture rises quickly but not so high in coarse land. Increasing Soil Moisture. — Since humus holds so much capillary water, the farmer has one sure way to increase the water-holding power of any soil. The addition of green manure and barn manure will cause humus to form in the soil. Large quantities of humus will hold more moisture in Fio. 35. — Water rises more rapidly by capillarity through fine soils than in coarse soil. the capillary form and thus encourage the growth of larger crops. Deep plowing will increase the depth of the water reservoir. Harrowing and cultivating will help, because the more a soil is stirred the less water it will lose by evapo- ration. Furthermore, rains sink into a loose surface better than into a hard compact one. Underdrainage of soils will increase this power to hold capillary moisture, because the volume of soil above the free water level is made greater. How to Save Soil Moisture. — Spaces between soil grains serve as very crooked small tubes to conduct the lower soil water toward the surface. Harrowing and cultivating the SOIL MOISTURE 65 surface of the soil will break the connection of the spaces or pores with each other. If this capillary connection is broken near the surface the moisture will be checked in its upward movement and be held near the roots. The covering of fine soil produced by a harrow or culti- vator is called a dust mulch or fine soil mulch (Figs. 36a and &). The chief purpose of the dust mulch is to save moisture. A8 growing plants use a very large amount of water, it is wise for the farmer to keep a fine soil mulch on the fields all the FIG. 36a — A ten-shovel sulky cultivator. This form of machine leavea a fine soil surface which helps to save moisture. FIG. 366. — A one-horse walking cultivator with many small shovels and a smooth rake behind. The fine soil mulch produced is the best means of preventing evapora- tion of the moisture. growing season. If the tubes and pores through which the water passes are undisturbed the water will escape rapidly into the air. If, on the other hand, these tubes are broken by tillage, evaporation is checked. EXERCISE. — Effect of Mulch, — When the ground is dry place an old cloth or carpet or a bunch of hay on the ground. In a day or so the ground under this mulch will become moist by drawing water up from beneath, while the ground around the mulch may remain quite dry. A covering of 66 PRODUCTIVE FARMING fine aoil made with a rake, called a dust mulch, will have the same effect in keeping garden soils moist during dry __ FIG, 37. — Spike-toothed harrow, producing a dust mulch in a peach orchard. (Experiment Station, N. J.) weather. A dust mulch can be made with a fine-toothed harrow or weeder over a large field very rapidly (Fig. 37.) • REVIEW. 1. Name the three forms of water in soils. 2. Which form is most useful to growing plants? 3. How can we determine the amount of capillary water in a soil sample? 4. How does free water in soil help the farmer? 5. Under what circumstances is the free water harmful? 6. What becomes of the moisture taken up by a growing crop? 7. Describe the movement of capillary moisture in soils? 8. What are pore spaces in soils? 9. What kinds of soil have the largest pores? 10. In what soils is the capillary movement of moisture most rapid? What is the effect of rolling the loose soils? 11. What soils hold the most capillary moisture? 12. What kind holds the least? 13. Suppose humus soil and sandy soil were mixed, what would be the effect on their moisture-holding powers? 14. What is a dust mulch? How made? 15. What is the effect of a dust mulch? Reference. — Dry Farming, by Widtsoe. LAND DRAINAGE 67 CHAPTER VII. LAND DRAINAGE. ALL good farm land should be well drained. In some cases it is naturally drained because of the loose or open character of the subsoil. In other places we find the sur- face so sloping that much of the rainfall is carried away on the surface or near the surface. There are special cases where some form of artificial drain should be used. What Drainage Does. — In soils where water stands too close to the surface, drainage will help in several ways. We, therefore, use draining ditches or drain pipes for the following reasons: 1. To remove surplus water. 2. To admit air to soil and roots. 3. To deepen feeding area for roots. 4. To reduce suffering at time of drought. 5. To aid tillage. 6. To increase chemical action. 7. To raise the soil temperature. Soil which has been well drained is improved, not only by the removal of water from it, but because the more rapid passage of water through the soil carries the air and warmth to lower levels, which are important factors in making plant- food soluble, and thus increasing the power of plants to secure food. On too many farms we find half-developed crops grown year after year upon land which would be able to yield large returns if properly drained. Methods of Drainage. — There are two general methods of draining land: first, by open ditches, which may have either straight banks or sloping banks; second, by underdrains or 68 PRODUCTIVE FARMING covered drains, which may be composed either of tile (Fig. 38) or of broken stone, gravel, boulders, etc. Surface or open ditches are cheaper to start with, but are not so good as others. They do not give as good results, and are in the way. Effect on Roots. — Deep drainage increases the room for plant-roots. The roots of most farm crops will not grow down into any free water which may be standing in the sub- soil. If drains carry away such water the roots may go into the deeper soil to get plant-food (Fig. 39, D). FIG. 38. — Ready to lay the six-inch drain tiles. This reduces suffering at time of drought, because the roots are then so deep in the soil that the drying of the surface does not harm them. They get their moisture from lower depths and from a larger volume of soil. On the other hand, if the free water is allowed to remain near the surface during the spring of the year (Fig. 39, F), very shallow root systems are formed. Later, in July, when a drought comes, the free water settles to a great depth too quickly for the roots to follow. The shallow roots are then, surrounded by the dry soil near the surface and growth is stopped (Fig. 39, W). LAND DRAINAGE 69 How Drainage Warms the Soil. — Drainage lowers the water in soils. As the water goes downward, the air from above is drawn into the soil. In warm weather the air will thus warm the soil, increase chemical action, and aid in the growth of soil bacteria. Plant growth is thus hastened. Drains Ventilate the Soil. — This not only warms the soil but also gives it the necessary oxygen and removes the harmful gases. FIG. 39. — Drainage deepens the feeding area for roots and reduces the suffer- ing at time of drought. The view at the left shows free water just under the roots. When drought comes the roots are left so near the surface as to let them dry very badly. See centre view. The view at the right shows the deep root system allowed by tile-drainage. Where Drainage is Needed. — There are several kinds of places where it would be wise to put in artificial drains of some kind: — 1. Flat lands which are too wet because of the overflow of streams at time of heavy floods. 2. Bogs and marsh lands which hold the free water too near the surface most of the summer season. 3. Large, flat areas having clay subsoils. 4. Depressions in hillsides which hold the water coming from the land above. 5. Fields which are to be flooded at certain times for special crops, such as rice and cranberries. Principles of Underdrainage. — The value of under- drains depends upon the free passage of water through them. 71) PRODUCTIVE FARMING They should always lead to the lowest portion of the field. They must be gradually sloped to secure an even flow of water in them. A fall of two feet in one thousand will be enough for the flow of water if the tile pipes are laid care- fully. The main drain should always occupy the lowest part of the field, and the others may lead the water to the main. FIG. 40. — Laying drain tiles and testing the depth by measurement from level grade stakes. The distance of drains from each other and the depth below the surface are governed by the character of the land. On light, open soils, they should be deeper and farther apart; on heavy land they should be nearer to the surface and closer together. The mouth of the drain should be well protected, and kept free and open. Drain Tile. — The best underdrains are made by laying drain tile pipes in the bottom of the ditches. These are then covered with soil. SOIL IMPROVEMENT 71 The tile pipes should be very strong and hard, so they will not rot in the soil. They should be smooth inside to avoid clogging. The ends should be clean cut so they will fit together closely. A very common length for each piece is twelve inches, but sometimes they are longer than this. The joints are open but are usually covered with sods, rocks, broken tile or other material to help keep out the fine soil. Sections of drain pipe are placed as close together as possible and the openings are very small (Fig. 40). Water enters drain-pipes at the joints. The pipes carry away only the free water and the capillary moisture is left in the soil for the use of plants. If the pipes should lead through a drier soil, the water would there flow from the pipes into the soil. REVIEW. 1. Give several ways in which drainage may help the soil. 2. Give two methods of draining land. 3. How does drainage warm the soil in the spring? 4. How does drainage reduce suffering at time of drought? 5. Give five kinds of places where drainage is needed. 6. Give several points to be observed in making underdrains. 7. What does distance between lines of tile depend upon? 8. What things help to determine the depth at which to lay drain tiles? 9. Describe good drain tiles. 10. How does water enter a line of tile? References. — U. S. Farmers' Bulletins: 524, Tile Drainage on the Farm; 698, Trenching Machinery for Tile Drains. CHAPTER VIII. SOIL IMPROVEMENT. THE farmer should do what he can to improve soils, as natural causes work too slowly. The depletion of a poor soil may be due to the natural causes. Fields that are on hillsides may be badly washed and gullied by running water 72 PRODUCTIVE FARMING from rains. Such bad effects can usually be remedied by the application of practical methods. The aim should be to bring the soil into suitable condition for the production of large crops. Kinds of Improvement. — The improvement may be in several regards: 1. In its physical condition. 2. In its chemical make-up and food-yielding power. 3. In its moisture-holding power. 4. In its germ life or bacteria. FIG. 41. — Plowing under a crop of green manure to add humus to the soil. Tillage is one of the commonest ways to put soil in proper physical condition to yield good crops. There are two main types of tillage: Deep tillage, as with a plow (Fig. 41), and shallow tillage, as with harrows and cultivators (Figs. 37 and 42). Objects of Plowing. — The primary object of plowing a field is to make a good seed bed by crumbling the soil and SOIL IMPROVEMENT 73 making it fine. As the furrow slice slides along the curved surface of a polished mouldboard, the particles are caused tc slide upon each other. Take the leaves of a book between your thumb and finger when the edges are nearly even. Bend them, and see that they all slide a little and the edges are no longer even. Thus, in plowing, the particles of soil tend to slide upon each other and the crumbling is accom- f plished. Other objects of plowing include: 1. The covering of wild plants and burying of stub- ble, stalks, vines, and other wastes. 2. The unlocking of plant- food in the soil by exposing the particles to new .condi- tions of heat, light, moisture, and air. 3. The deepening of the water reservoir and making the moisture conditions more perfect. 4. Loosening of the soil to allow of better shallow tillage. Plowing not only pulverizes and loosens the soil; it may also warm and dry wet soil; it may deepen the surface soil and increase the feeding area for roots; it admits air and increases the weathering; it deepens the water reservoir. Plows. — Walking plows are best for rough and stony fields. Riding plows have wheels, and are called sulky plows. These are much more common in sections where the fields are large, level, and free from stones and stumps. Gang plows are those which have two or more plows attached to the same frame and turn several furrows at a FIG. 42. — Cultivating young peach trees. Frequent tillage makes the soil yield its fertility to growing plants. (Experiment Station, N. J.) 74 PRODUCTIVE FARMING time (Fig. 43). The two-plow gang is usually drawn by horse power, but larger gangs are frequently drawn by steam or gasoline traction engines. Forms of Mouldboards. — Plows have three main forms of mouldboards, suited to the different purposes of the farm. The mouldboard for turning over sod is long from the front point to the rear, is very oblique, and has a very slight curve. The rear of the mouldboard turns the slice more nearly upside down than the other forms. The mouldboard for stubble ground is extremely different from that of the sod plow, being very short, steep, and much curved. It bends the furrow slice abruptly and causes it to crumble, leaving it somewhat on edge. FIG. 43. — Modern gang plow, turning two furrows at a time. The general purpose mouldboard is medium in form between the other two extremes, and is useful where much litter and manure are to be plowed under. Fall Plowing.— When a field is plowed in the fall it gives more time for the rotting of barnyard manure and other forms of vegetable matter turned under by the plow. The farmer usually has more time in the fall, and the plows may be kept going until the soil is frozen. Heavy soils plowed in the fall are greatly improved and made mellow by alternate freezing and thawing during winter. Many forms of inju- rious insects are destroyed in the upturned soil during the winter. The moisture conditions are better and the crops SOIL IMPROVEMENT 75 will suffer less from drought than if the soil were not plowed until late spring. There is one strong argument against late fall plowing: It prevents the growth of a winter cover crop on the field. The very light soils are greatly benefited by winter cover crops. In regions where the climate is dry, winter cover crops are used to prevent the blowing of soils. In hilly regions where heavy winter rains are common, cover crops are necessary to prevent washing or erosion. Depth of Plowing. — For most crops deep plowing gives better results than shallow plowing. A very good general rule for humid climates would be to always plow the soil as deep as the dark surface soil, being careful to not bring too much of the subsoil to the surface. When vegetable matter is plowed under each year, the plowing can extend to a greater depth each time. Shallow tillage includes the cultivating and harrowing of soils. There are several objects in view — the preparation of a seed bed, the killing of weeds, and the saving of moisture. (Figs. 36a and 6, 37 and 42.) Preventing Weeds. — Before crops are planted in the spring, -the soil should be so frequently tilled as to prevent the starting of weeds; that is, to kill the little sprouts before they show above ground. On fields of corn, potatoes, cotton, and other crops in rows, the tillage should also be very frequent and shallow — thus killing the little sprouts of weeds and checking the loss of soil moisture. If weeds are allowed to grow they take from the soil quite as much plant-food and moisture as the cultivated plants. Green Crops as Manures, — Crops are frequently grown with the intention of turning them under before they become mature. Such are called green manures. They add vegetable matter to the soil in a form to decay quickly. This produces humus and liberates considerable plant-food in a form ready for crops to use. Both physical and chemical benefits thus 76 PRODUCTIVE FARMING arise from the use of green manures. Red and crimson clover, cow peas, vetch, rye, and buckwheat are commonly used as green manures, but any other crops may be grown for this purpose. Those plants which belong to the legume, or clover, family are among the best for this purpose, because they gather nitrogen from the air and leave it available for the use of other crops. The benefits of this family of plants will be discussed more fully in the chapters on Farm Crops and Alfalfa. Benefits Enumerated. — By the careful use of green manures, soils may be benefited in several ways: 1. Food is brought from great depths by the roots and when turned under is left near the surface. 2. Such food is left in a form suitable for other plants to easily make use of it, because the green manure will decay quickly. 3. The decaying matter becomes humus and has many beneficial effects, already studied. 4. Chemical action in the soil is promoted. * 5. Small organisms, bacteria helpful to the soil, are multiplied more rapidly. Planning for Green Manures. — It requires some planning ahead to be most successful in securing crops suitable as green manures. Certain crops, such as rye and crimson clover, may be sown in the late summer or fall after the season's crop is off. These may be plowed under in the spring as green manure before the next season's crop is put in. Cow peas or buckwheat may be used to produce a good heavy green manure crop by letting it use the last half of the summer after a crop of small grain has been removed from the field. Care in Their Use. — When too heavy crops of rye or clover are plowed under at one time, there are apt to be bad results-. This is chiefly due to the formation of acids in the soil which make it sour. Such bad effects are not noticed SOIL IMPROVEMENT 77 when there is plenty of lime in the soil. Lime should be applied to the soil when heavy crops are plowed under. Heavy applications of green manure also have a drying effect upon the soil, and there may then be more suffering at time of drought. Benefits of Lime. — In another chapter the character of limestone soils was discussed. (Pages 53-54.) It is a good practice to spread lime on soils for certain crops just as fertilizer is applied. The benefits derived from the addition of lime to soils are here enumerated : It aids decay of vegetable matter. It helps liberate plant-foods in the soils. It hastens the growth of bacteria in the soil. The heavy clay soils are made more open, porous, and more easily tilled; moisture and air move more freely; the soil will then become warmer in early spring. The light sandy soils are made more compact, and hold moisture better. Lime acts upon acids in soils and destroys the sourness; this is a benefit for nearly all farm crops. It is a direct plant-food for alfalfa and some other mem- bers of the clover family. EXERCISE. — Slaking Lime. — Expose a small lump of burned lime, called quick-lime, on a board or paper, for a day or more until it crumbles to powder. This powder is then called air-slaked lime. A second lump of quick-lime may be placed in a dish and wet with a very little water from time to time until it heats and crumbles. When burned lime is used on soil, it should be air-slaked before spreading. A little water added to it will hasten the slaking. EXERCISE. — To Study Lime-water. — Slake some fresh lime the size of a baseball by pouring water over it very slowly until it crumbles. Then cover it well with water and stir. After it is allowed to settle, pour off the clear water. Put in a strip of red litmus paper and note the result. 78 PRODUCTIVE FARMING Put in a strip of blue litmus paper and see the result. Why is it not affected? Draw off a glassful of the lime-water and, after taking a deep breath and holding it for awhile, force the air from the lungs into it through a straw or tube. The milky color resulting shows that there is a union of the lime-water with the carbon dioxide in the breath, and a new substance is formed. If some of the clear lime-water is left open to the air for some time, a white crust will be formed on the top of it in the same way. EXERCISE. — To Show an Important Plant-food in Ashes. — Pour a few quarts of water into a pan of wood ashes and allow it to stand for fifteen minutes. Drain the water out through a loosely woven cloth. Examine the liquid to detect the lye or potash in it. It is soft and slippery to the touch. Place some red litmus paper in the liquid. It will turn blue. This is because the potash is what we call an alkali. EXERCISE. — Wood Ashes and Sour Soil. — Bog soils are often sour and show an acid reaction with litmus paper. Make some soil sour by wetting it with vinegar. See if it turns litmus paper red. Then wet it with "lye water" obtained by letting wood ashes stand in a vessel of wafer. Test with litmus paper. This time it should change to blue. Sour (or acid) soils may be made "sweet" or neutral by spreading wood ashes on them. Fresh or well-stored wood ashes contain both potash and lime, which have several benefits besides correcting acidity of soils. EXERCISE. — Lime and Sour Soil. — Take a sample of sour soil which you have prepared as in the last exercise. Sweeten (or neutralize) it by the application of lime-water prepared by slaking lime in water. Lime is very helpful to bog soils and other soils too rich in humus. Barnyard Manure. — The use of barnyard manure on farm and garden soils is one of the best ways of improving them. Its benefits are of several kinds. It is a direct food SOIL IMPROVEMENT 79 for plants because of the three fertilizing elements which it contains, nitrogen, phosphoric acid, and potash. These are the three elements of plant-food of greatest value to plants. Another benefit is from the vegetable matter con- tained in the manure, which is a great source of humus. This helps to put the soil into better physical condition and makes a better home for soil bacteria. The decay of the vegetable matter sets up certain chemical changes which are of benefit to the soils and crops. Value of Manure. — The value of barnyard manure depends on several conditions : The age and kind of animals. The kind and amount of feed they eat. The amount and kind of litter or bedding used. The care of the manure after it is made. The age of the manure. When compared with the market prices of commercial fertilizers the average value of manure from the barn of a horse or mule in a year is estimated at $43; a cow, $38; a hog, $25; a sheep, $4. To get these values the manure must be used to the best advantage. When equal weights of manure are considered the values from the different kinds of farm stock would usually be in this order : Poultry, sheep, pigs, horses, cows. Loss in Manures. — Manures are liable to lose their value during storage from two direct causes: First, heating, when left in heaps in the barnyard or in the field. This results in the loss of nitrogen. Manure must not be allowed to get hot from its own fermentation. Second, leaching, when left where water can wash it. This may take away much of the valuable plant-food. When manure is allowed to leach the most valuable parts are lost first. Extremes in moisture and temperature should not be allowed if manure is to be saved. There is very little loss 80 PRODUCTIVE FARMING if the heap is kept wet enough to prevent heating, and kept dry enough to prevent water from passing through it. Under the average conditions where manure is allowed to stand in the barnyard for three months or more, the loss is from one-third to one-half of the plant-food in it (Fig. 44). Care of Manures. — A good way to save manure is to store it under cover— sheltered from rain and direct sunshine. There is less heating of manure when it is packed very hard, because the air is kept away. One plan of keeping it well packed is to have a shed or covered barnyard with a FIG. 44. — A poor way to store barnyard manure, even when the ground is leveL The barn is badly rotted by this method. (Animal Industry.) cement floor, on which the manure from the barn is spread daily. Stock are allowed to tramp this down all winter, and it is hauled to the fields in the spring. Spreading Directly on Fields. — Barnyard manure is used to the best advantage when it is spread directly on the fields regularly, every day or every week. In northern and central states where many animals are stabled during the winter, a large amount of manure is allowed to pile up about the buildings and waste rapidly. It should be spread on the fields, where it is to be used, as fast as it is made (Figs. 45 and 46). SOIL IMPROVEMENT 81 This saves the manure best. Labor is cheaper in winter; snows may allow the use of sleds for hauling; the least amount of labor is required in placing the manure from the stalls on a sled or wagon to be taken to the field. The manure should be spread when carried to the field, and not left in heaps to leach. The practice followed in some sections of putting the manure in piles in the field should be stopped. That is an old-fashioned way which requires more labor. It makes the grain or other crop uneven in growth and uneven in ripening. It does not make the best use of the plant-food in the manure. FIG. 45. — The modern manure spreader in the barnyard. A litter carrier which runs on an overhead track is used to take the manure from the barn. The figure Bhows the carrier in position of emptying into the spreader-box. The team hitched on and the load is spread in a field as shown in another figure. Using Barnyard Manure. — Three points should be con- sidered in the use of barnyard manure. First, it is rich in nitrogen and has some of the other elements. Second, it is well supplied with bacteria which are very helpful to the soil. Third, it supplies the soil with humus. The manure of the farm should be spread on the highest parts of each field, because they are usually the poorest soils and some of the fertility naturally washes down toward the lower soils. 82 PRODUCTIVE FARMING A light dressing of manure on each field every year is better than very heavy applications less frequently. This is particularly true if the soils are light. Large applications of manure are saved better by heavy soils than by light soils. Fresh manure has a forcing effect on the crops. If large amounts of fresh manure be applied to light soils there is danger of the plants suffering from drought in dry seasons; the soil may be made too open and loose by too much fresh manure at one time. Soils containing much clay will not Buffer from larger amounts of fresh manure. FlQ. 46. — A manure spreader at work. This machine can be regulated to spread the manure thick or thin on the field. The spreader makes the best use of the manure, eaves labor, and produces the most uniform crop. Some root crops, such as potatoes, may be injured by the use of fresh manure. Scab disease may bdcome worse. On fields where such crops are to be grown a large amount of manure may be used one year before the root crop is planted. Composts. — For gardens, flower-beds, and greenhouses, it is sometimes a good thing to rot the manure before it is used. How to do this without wasting its plant-food is a problem which many farmers do not understand. The use of a compost heap serves the purpose very well. A good compost heap is made by spreading a layer of barnyard manure, then a layer of tough sods from a meadow, or a layer of leaves, on each of these two layers is sprinkled SOIL IMPROVEMENT 83 Borne lime or wood ashes. The layers are repeated until the manure is all in the compost. The moisture from rains prevents the compost heap from rotting too fast and becom- ing too hot. The sod layers save much of the plant-food which would otherwise leach out. Rotting manure in a compost heap will kill the weed seeds; it will reduce the bulk of the manure; it helps to unlock the plant-food in the manure; it destroys the injurious effect which fresh manure has on such crops as potatoes. Whether to make such a compost of the manure will be determined by the uses for which it is intended. Feeding Plants. — Those forms of plant-food which con- tain nitrogen, potash, phosphoric acid, or lime are considered most precious on any farm. Soils are apt to become weak in these foods. Many such compounds readily dissolve in water and are lost from the soil at times of heavy rain by leaching or washing away. They may be absent from other causes. There are few if any other plant-foods which need cause the farmer much concern. The others are usually abundant enough. Commercial fertilizers containing nitrogen or phosphoric acid or potash — or all three of these — are purchased in great abundance in the Eastern and Southern States and for special crops elsewhere. These are applied to the soils for the direct feeding of crops. It is estimated that over eight mil- lion tons of such fertilizers are used in the United States each year. These cost the farmers over two hundred million dollars. As a rule they have no beneficial effect in improving the soil itself, as do the barnyard and the green manures. A commercial fertilizer is valuable in proportion to the amount and kind of these three plant-foods contained in it. Nitrogen is the most important element of such fertil- izers, because soils are more often in need of it and it is the most costly. When it is in a soluble form for plants to use, it is apt to be lost from many kinds of soils, unless cover 84 PRODUCTIVE FARMING crops are used. There are several sources of the nitrogen purchased for fertilizers. Nitrogen is derived from animal or vegetable matter as in meat scraps, dried blood, and cottonseed meal. It is also abundant in sulphate of ammonia and nitrate of soda purchased by fertilizer manufacturers. . In the nitrate form it is more quickly useful to the crops, and should be applied to the soil after the plants have started growth. Some of the other forms in which nitrogen is used are very slow in changing to forms available to plants; some of these are hair, leather scraps, garbage tankage, and others. It is very important for the farmer to know the source of the nitrogen in the fertilizer he is buying. For this reason it is becoming a common practice in some sections for farm- ers to buy the fertilizer materials separately and mix them on the farm. Phosphoric acid is contained in substances in combina- tion with lime and other materials. Such combinations are called phosphates. Ground bone is one of the chief sources of phosphoric acid in fertilizers. If this is ground very fine it will rot gradually and liberate food useful to growing crops. Animal bone contains on an average four per cent of nitrogen and twenty per cent of phosphoric acid. Bone tankage is a by-product from slaughter-houses, made up of various wastes that have been thrown in a tank and the grease extracted. Its value varies considerably according to the amount of meat or of bone in it. Phosphate rock has been obtained some time from a number of deposits in South Carolina, Florida, and Tennes- see. Recent discoveries of it have been made in Utah, Idaho, and Wyoming. The rock is used in two ways: (1) It is ground very fine and applied to soils, yielding its phosphoric acid to plants very gradually. This form is sometimes called floats. (2) The ground phosphate rock is treated with sulfuric acid SOIL IMPROVEMENT 85 before it is used on the soil. This makes the phosphoric acid more quickly available for the use of growing plants. In this form it is called superphosphate, or add phosphate, which is a soluble phosphate; this may contain from fourteen to twenty per cent of phosphoric acid. Super- phosphates may also be made from bone and bone tankage. EXERCISE. — To Study Phosphorus.— Roll the head of a match between the moistened fingers. The white fumes are caused by the phosphorus in the match uniting with the oxygen in the air. They are called phosphoric acid. This is a form of the plant-food we have been studying. Potash is the third essential element in commercial fertil- izers, and is not so generally required. It is often needed on soils that have been farmed for a long time and also on sandy soils and peaty soils. It is derived from wood ashes to a limited extent. The largest source is in the form of mineral salts from the Strassfurt Mines of Europe. The chief names given to these salts are car-nall-ite, kain-it, and syl-vin-it. These may be ground fine and used on the soil; but they are more commonly refined or concentrated before being shipped to this country. The two concentrated forms of potash salts are the (1) muriate of potash, contain- ing fifty per cent of actual potash, and (2) the sulfate of potash, containing forty-eight per cent of actual potash. In all of the forms potash is soluble in water, and is easily absorbed by plants. Value of Fertilizers. — In buying commercial fertilizers the purchaser should remember that the agricultural value is based not upon the brand but more upon kind and form of the elements and upon their proportion in the mixture. Many farmers are inclined to buy fertilizers that have a low price per ton. These are invariably more expensive sources of plant-food elements than those more highly con- centrated, because of the necessity of diluting the mixtures with ' 'make-weight" or low-grade materials. High-grade 86 PRODUCTIVE FARMING fertilizers, those that contain good forms of plant-food, cannot be made from cheap materials, and if they contain high percentages of the elements they cannot be sold for a low price (Fig. 47). The price per ton, whether high or low, is not a safe guide as to the effect that a fertilizer may have upon the crop production. This is measured by the kind and form of the materials used in the mixture. EXERCISE. — Dissolving Nitrate of Soda. — Put one-half teaspoonful of nitrate of soda in a glass of water and stir FIG. 47. — The large square A represents a ton of low-grade fertilizer (for- mula 2% nitrogen, 8% phosphoric acid, 2% potash). The valuable part is represented by the dark square in the corner. The shaded area shows what is called filler, which does no good to the soil. The large square B represents a toa of high-grade fertilizer. The valuable part is what is shown by the white square in the corner. Some filler is always present. It is represented by shaded area. until dissolved. Plants must have their food in the soil dissolved before they can use it. Would this nitrate dissolve in the rain? EXERCISE. — Collection of Fertilizers. — Let the pupils aid the teacher in making a collection of all the different fertil- izers to be found at the dealers or which can be secured by mail. Put these in bottles with suitable labels. Keep them for future study. EXERCISE. — Solubility of Phosphates. — Put a very little phosphate rock which is ground fine in a glass of water and see if it will dissolve. Do the same with a little ground bone in another glass. Pour in a little clear lime-water. If there were any phosphate dissolved this would cause a SOIL IMPROVEMENT 87 white cloudy appearance. If bone and phosphate rock were in the soil, would they be dissolved by rain? EXERCISE. — Dissolving Superphosphates. — Put a very Mttle superphosphate (or acid phosphate) from a fertilizer sack in a glass of water and stir. Does any of- it dissolve? Add a little clear lime-water. It should make a white cloudy appearance, showing that some of the material has dissolved. This would mean that plants could use this form of fer- tilizer. Problems. — 1. If nitrate of soda is 16 per cent nitrogen, how many pounds of nitrogen in a ton of it? 2. If sulphate of ammonia is 20 per cent nitrogen, how much of it would be required to supply a 12-acre field with 240 pounds of nitrogen? 3. When available phosphoric acid is valued at 5 cents per pound, what should be the cost per ton of mineral super- phosphate which is 14 per cent available? What should it cost per ton if it is 20 per cent available? 4. A shipment of sulphate of potash contained 48 per cent potash, which should sell at 5 cents per pound of potash. What will be the selling price per ton of this fertilizer? REVIEW. 1. Give four kinds of improvement for soils. 2. Give two kinds of tillage and the implements used for eaoh. 3. Give all the objects of plowing. 4. Describe the different forms of mouldboards and the special use of each form. 5. What is a gang plow? 6. Give several reasons for fall-plowing. 7. Give a general rule governing the depth to plow. 8. Describe a system of preventing weeds by shallow tillage. 9. Give the benefits derived from green manures. 10. What care should be exercised in the use of green manures? 11. Give the effects of lime on light soils. On heavy soils. 12. Give five other effects of lime. 13. Give five things which influence the value of barnyard manure. 14. What are the two main causes of loss in stored manures? How great is the loss usually? 15. Describe two good ways of storing manure. 88 PRODUCTIVE FARMING 16. By what plan is manure used to the best advantage? 17. Describe the making of a compost. Of what use is it? 18. What three important plant-foods are found in commercial fertilizers? Which is the most important? 19. Name five or more substances from which nitrogen is derived. 20. Give three sources of phosphoric acid. 21. What are superphosphates? 22. Give the sources of potash in commercial fertilizers. 23. What efforts to improve soils have you observed? 24. What crops are grown in your section to plow under as green manure? 25. What forms of lime are used? On what crops? 26 Do farmers in your section haul out manure in the winter? To what fields? CHAPTER IX. SYSTEMS OF CROPPING. BY rotation of crops is meant the succession, of different crops, in contrast with the bad practice of having the same kind of crop grow year after year on the same field without any cover crop intervening. Special and General Farming. — In many of the Eastern States special farming is more profitable than general farm- ing. The raising of dairy produce, poultry products, hay, and seed-corn are some of the distinct lines of special farm- ing. In the South, cotton, cane, corn, and tobacco are among the special crops. In the Northwest and Middle West grain is the only crop on many farms. General farming is practised in nearly all parts of the country. In such cases it is found much easier to carry out good systems of rotation. Why We Rotate Crops. — There are a number of advan- tages gained when crops are raised in rotation. 1. Some crops have deep roots; others shallow roots. The growth of a variety of crops on a certain field will pre- vent it from being exhausted so soon. SYSTEMS OF CROPPING 89 2. Grain crops and many others take all their nitrogen from the soil; but leguminous crops, such as the clovers, peas and beans, gather much nitrogen from the air in the soil. Their growth will increase the store of nitrogen in the soil. A rotation of crops which includes the legumes will help to keep up the nitrogen supply in the soil. 3. Crops put waste matter into the soil through their roots. This often acts as a poison to the kind of plants that put it there. It may not be a poison to other kinds of crops which follow in the rotation. 4. Soils should be covered with growing crops as much of the time as possible. This guards against loss of soil by washing and leaching. It is possible to keep the soil thus protected if we have a rotation of crops; but it is usually not possible if but one crop is grown. 5. Insect enemies and diseases of plants are liable to be worse when one crop is grown continuously. Rotation of crops is often a perfect remedy against these enemies. 6. There is more continuous work for men and horses, because a rotation of crops distributes the labor throughout the season. Horses and men should be given steady employ- ment if possible. It is not profitable to keep horses idle too long at a time, as when only one crop is raised. 7. Rotations always require a variety of soil treatment, as plowing the ground at different times of year. This is better than always following the same tillage at the same season of the year. We can best control the soil moisture by proper tillage at the right season. 8. Rotation of crops helps to keep weeds in check. Many weeds which thrive in a hayfield will be kept down by a culture crop, as corn, cotton, or potatoes; while certain other weeds, which are bad in a cornfield, may be killed by growth of grain or grass. 9. More sources of income are found on those farms where rotations are practised. There is also less danger of financial 90 PRODUCTIVE FARMING loss in seasons when certain crops are failures. The other crops grown on the fields of the farm may not fail. Chief Needs of Rotations. — The needs of rotation are fairly well understood by most farmers. There is greatest need when crops are suffering from particular weeds, bad insect pests or diseases, or when the soil is becoming exhaust- ed. However, rotation of crops should always be practised. EXERCISE. — One Benefit of Rotation of Crops. — Have students dig out a few plants of different kinds of crops, such as clover and timothy. They should study the root systems and compare the deep-feeding roots with the shallow- feeding ones. Shallow roots use the surface soil; deep roots, such as clover, will bring up food from the subsoil. This will help to make plain one value of rotation of crops. Bare Fallow. — It is now considered bad practice to allow ground to remain bare for any great length of time between one crop and the next. It is sometimes a good plan to do this for a few weeks providing the. soil is kept pulverized on top by the use of a harrow once a week or soon after each rain. This practice of bare fallowing will cause the sprouting of weed seeds and the harrow teeth will kill the young sprouts. The soil moisture is also saved by the mulch of fine soil on top of the field. Catch Crops. — In place of fallowing has come the use of catch crops. In this method the ground is kept covered with a growing crop of some kind as much of the year as possible. For example, after a grain crop has been removed, a crop of cow peas, soy beans, millet, sorghum, or some other quick- growing crop is seeded. Crimson clover (Fig. 48) and winter vetch are often mixed with winter grain and sown in the cornfield in July, so they will be ready to occupy the field as soon as the corn crop is taken off. These three plants all live through the winter. This winter cover crop is also used after removing other crops such as early potatoes. //How They Help the Farmer. — Catch crops or cover crops may be useful in several ways: SYSTEMS OF CROPPING 91 1. They help to hold soil from washing away by heavy rains. 2. Their roots are helpful to unlock plant-food in the soil. 3. When members of the clover family of plants, called legumes, are used, they gather nitrogen from the air and add it to the soil for future crops. FIG. 48. — Crimson (or scarlet) clover. This is a hardy legume, chiefly used as a winter cover crop. It is sown in fields of corn, cotton, or other crops and in orchards in July or August. It will improve the soil while growing until the following spring. It may then be cut for hay or may be plowed under for green manure. 4. They check the growth of bad weeds. 5. They furnish pasture, hay or other valuable stock feed. 6. If plowed under as green manure, they produce humus in the soil, and quickly give to the soil the plant-food they have been using. 7. When grown among fruit trees and shrubs they check late growth of the trees and temper the effect of winter freezing. 92 PRODUCTIVE FARMING Cover Crops in Orchards. — In young orchards winter rye is sown in early fall. This crop is turned under in spring and soy beans or cow peas are sown in June, to be turned under in time for sowing rye. These add humus and keep a cover on the orchard soil; the cow peas or. soy beans add nitrogen, and much plant-food is unlocked by all of them for the young trees to use in their growth. A Few Rotations. — Examples of rotations with catch crops and cover crops may be of interest : 1. Oats and common red clover may be sown in the early spring. When the crop of oats is harvested the clover will occupy the ground quickly. It forms a good cover on the field that winter, and will produce one or two cuttings of hay the next summer. The stubble may be plowed under for corn the following spring. In the cornfield in July we can sow a cover crop of crimson clover, winter vetch, and rye for a winter cover crop. This is to be plowed under the next spring as green manure. This three-year rotation is thus outlined: Oats; Red clover; Corn with winter cover crop. 2. Early potatoes may be followed with a winter cover crop. This cover crop is plowed under in the spring and early potatoes again planted. This and the next are called one-year rotations. 3. Corn is sometimes planted on a field year after year if a winter cover crop is put on each time. 4. Winter wheat is sown in September, and the crop cut in July. After the stubble is plowed in, a good summer catch crop of cow peas or of soy beans may be grown in six, eight, or ten weeks. Then the catch crop may be harvested for hay or it may be plowed under as green manure. This is done in time to prepare the field for winter grain again. A Rotation for Dairy Farms. — A very good four-year rota- tion followed by a number of dairymen is about as follows: SYSTEMS OF CROPPING 93 The farm has four fields, A, B, C, and D. This year, field A is seeded to oats and red clover with a little timothy and blue grass in it. After the oats are cut off the growth of clover comes on and may be pastured a little in September. Next year the clover will be cut twice for hay. The third year the field will be well filled with the grasses and some clover and the stock will use it all for pasture. This will be plowed for the next year's corn crop. Fields B, C, and D each follow the same rotation, but each is just a year behind the other, thus: A B 1st year Grain and seeding Clover hay 2d year Clover hay Pasture 3d year Pasture Corn 4th year Corn Grain and seeding C D 1st year Pasture Corn 2d year Corn Grain and seeding 3d year Grain and seeding Clover hay 4th year Clover hay Pasture Details of the Rotation. — The four fields are each about the same size and the corn area may be reduced by using part of that field for the summer green-feed each time. In this four-year rotation system two of the fields are plowed and prepared for planting each year, one for spring grain and one for field corn. In case winter grain is used instead of spring grain, the corn is removed as soon as possible after cutting. Quick rotations give us better clover for the dairy herd than when the fields are kept in hay for several years. It is better for the dairyman to produce hay that is all clover than it is to let the clover all disappear because the field is kept too many years in hay. Timothy hay or the "mixed' ; red-top and timothy are very poor milk producers. Clover is more than twice as valuable for milk cows. In this four-year rotation a small permanent pasture may be used also; but let it be well kept up and never used too 94 PRODUCTIVE FARMING long at a time. If the other four fields are fenced, the field that is growing up to timothy and blue grass will make the best pasture. During the winter and early spring the stable manure may be spread on the field that is to be plowed up next for corn. This rather rapid rotation of crops keeps up the fertility of the soil well. It allows the use of clover often on each field, and clover manure is one of the richest forms of manure for the soil. Pasturing a field one season in four is no small factor in keeping up its fertility; but some commercial fertilizer, in the form of acid phosphate and potash, may be used to supply the loss of mineral constituents. Some of this fertilizer may be applied when corn is planted and some when the grain is sown. Lime should be applied to the field where clover is to grow next. In all rotations where common red clover follows small grain, it is usually seeded in the growing grain in early spring or with the spring seeding of grain. An Alfalfa Rotation. — On dairy farms where alfalfa is extensively grown, some systematic rotation may be adopted. It is advisable to plow up the alfalfa field as soon as it becomes rather weedy. This gives a chance to take advantage of the fertility which it has been gathering for us. As soon as the June cutting has been taken off, the ground is quickly prepared for corn to be used for fodder. The next spring oat-and-pea mixture is sown, and as soon as the crop is off the stubble is turned under. The harrow is used once a week until the middle of August; then lime is applied and alfalfa is seeded, using about thirty pounds to the acre. Inoculation at this time is unnecessary. We have thus taken from the field a crop of fodder corn and one of oats- and-peas, between two crops of alfalfa. EXERCISE. — Rotation Courses. — Let pupils report on the rotations followed at home or in the farming neighbor- SYSTEMS OF CROPPING 95 hoods where they are best acquainted. They may tell whether they could be improved or not. Some of them should be written on the blackboard and discussed as to the tillage required, effects on weeds, and other points. FIG. 49. — Oats and peas sown in early spring, ready to cut for use as green feed or for making hay by the middle of June. Corn may be grown on the same ground in the same season. Harvesting the oats and peas shown in the upper figure. The stubble may be (Experiment Station, N. J.) Succession Cropping. — This is the growing of one after another on the same land in the same season. Tor example, radish, lettuce, tomatoes. Let the pupils tell what plans of cropping they have seen in use either in gardens 96 PRODUCTIVE FARMING or in fields. This may arouse much valuable discussion. (Figs. 49, 50.) Companion Cropping. — This is a form of double cropping. What crops may be grown in fields together? Have you seen Fio. 50. — Corn grown for forage after the spring crop of oats and peas shown in Fig. 49. (Experiment Station, N. J.) corn and squashes grown together? All the pupils should think over the crops that may grow together as companion crops. Early onions with late celery are an example in the garden. Early dwarf peas and tomatoes may be grown together. REVIEW. 1. Give examples of special lines of farming in your section of the country. 2. Give several reasons for the rotation of crops. 3. Why do we want crops of the legume family in a rotation series? 4. Can you tell how rotation of crops will help to keep down insect enemies and diseases of plants? 5. Explain why you think the sixth advantage from rotation of crops is a good one. 6. Name some weeds often found in hayfields or pastures which would not thrive in a cultivated cornfield. 7. Give one benefit of a bare fallow. 8. In what condition should soil be kept during a bare fallow period of a few weeks? 9. Tell the difference between a bare fallow system and a catch crop system. FARM CROPS 97 10. Give examples of summer catch crops. 11. Give examples of plants used as winter cover crops. 12. Give several uses of catch crops and cover crops. 13. Should such crops be used in young orchards or in old ones? 14. How do they benefit the soil and trees? 15. Give an example of a three-year rotation of crops. 16. Tell when each of these crops is planted and harvested. 17. Give an example of a rotation system where potatoes are the special crop desired. 18. Repeat the four-year rotation given in the book for dairy farms. 19. Describe a good rotation where alfalfa is grown. 20. What is succession cropping? Give examples. 21. What is companion cropping? Give examples. References.— U. S. Farmers' Bulletins : 318, Cowpeas ; 509, Forage Crops for Cotton Region; 515 and 529, Vetches; 550 and 646, Crimson Clover. CHAPTER X. FARM CROPS. Classification of Crops. — Field crops are those which are most commonly grown in fields; they are sometimes also grown in gardens. Those usually found in gardens only are called horticultural crops; these include all fruits and flowers and most vegetables. Crops of all kinds may also be classified according to the following six groups: 1. Forage and Fiber Crops. — These include grasses, clo- vers, and alfalfa, used for green forage, for hay, or for pas- ture; and cotton, flax, and hemp, used for fiber. 2. Cereal Crops. — The grains are called cereals. These include corn, wheat, oats, barley, rye and emmer. 3. Tuber Crops. — White or Irish potatoes are true tubers; sweet potatoes are usually also classified with tubers, but strictly speaking they are believed to be roots. 4. Root Crops include many that are used for stock feed, such as mangels, field beets, beets, turnips, carrots. 5. Market-garden Crops. — Here we find cabbage, cauli- flower, celery, onions, lettuce, radish, table beets, melons, and many others. 98 PRODUCTIVE FARMING 6. Fruit Crops. — These may be grouped as (a) stone fruits,, such as peach, plum, and cherry; (6) pome fruits, such as apple, pear, and quince; (c) small fruits, such as strawberries, grapes, currants, gooseberries, raspberries, and blackberries; (d) citrus fruits, such as orange, lemon, pomelo or grape fruit, and lime fruit. 7. Timber Crops, or products of the forest. FORAGE CROPS. The Soiling System. — One thing that the dairy farmer needs to keep in mind is the succession of green forage for use during the summer months when the weather is dry and the pastures are short. Crops grown to be cut and fed green to stock are called soiling crops. Such a system of feeding is called the soiling system. A better name would be the green-feed system. The soiling system used on any farm may be either (1) entire soiling, when green feed is provided for the whole season, or (2) partial soiling, where it is used in combination with pastures. The need for preparation in advance is very great on all dairy farms in this climate. The weather statistics show that we always have least rainfall in midsummer. There is certain to be enough drought each summer to cause a great shrinkage in the milk flow from herds fed on pastures. Just when the drought will come depends somewhat upon the locality and also the season. Frequently it is in July. Dairymen, however, prepare themselves to take care of the herd regardless of the dates when the dry weather comes. In a single county alone each summer there are thousands of dollars lost by the dairymen, due to the lack of green feed during the dry, hot days. In some localities the shrink- age of milk-flow is forty per cent in two weeks' time. In other cases the loss is about twenty-five per cent in the same time. Who is the loser at such a time? Is it the dairy farmer, or is it the buyer? Surely the farmer gets nothing for the milk which his cows fail to produce. He stands the FARM CROPS 99 heaviest loss. Some cows of the herds run so low at the dry pasture season that they cannot be brought back to their normal flow when the fall rains come. They are often carried into winter as mere strippers, at a dead loss to their owners. The farmer can lay out his fields and plan the seeding so as to have some green feed to give the cows at any time when the dry weather comes on. He cannot hope to have such green forage ready at any time it is needed for the cows unless he plans for it in advance. First, he should make a list of the crops which would suit his purposes and his other farm plans. Second, he should decide what areas of each of these crops will be needed for the number of cows in the herd, providing for plenty. If there is any left over it may be used for hay or fodder. Soiling Crops. — Here is a suggestive list: Wheat or rye mixed with crimson clover or winter vetch, sown in the corn- field in July, to be cut when the grain begins to head out or when in full blossom. Oats and Canada field peas sown in early spring, to be cut as the peas begin to blossom. Spring vetch with oats or barley, sown at the same time as oats-and-peas or a little later. Crimson clover sown in corn in July or August, ready to cut in May. Red clover sown last season may be fed green in June if needed. Timothy and other grasses may be cut early and some fed green to the cows. Alfalfa, where grown, will furnish green feed from May to October. Millets sown in ^arly June may be fed six or eight weeks later as green forage. Cow peas or soy beans sown in June or July will supply a long succession of green feed, at dates six to ten weeks from the seeding time. 100 PRODUCTIVE FARMING Flint corn, sweet corn, dent corn, and kaffir (Fig. 58), sown broadcast or drilled in rows, will begin to furnish feed as early as July 15th or August 1st. This will last until fall frosts come. After these soiling crops are gone the dairy farmer may use root crops, such as mangels, to furnish succulence for the dairy in late fall and early winter, if ensilage is not available. Oats and Peas. — The benefits derived from using this mixture as a crop each year on the farm are very great. As forage this mixture is very good because of the high content of protein. The ground should be plowed and harrowed early and the seed drilled in as early as the weather will permit. Do not be afraid of a little freezing weather afterward. Two bushels of Canada field peas and one bushel of oats will seed an acre. A bushel and a half of each may be used. For Green Feed. — Begin to cut the crop for green feed just as the first pea blossoms are showing. This first field will furnish green feed for the dairy herd for ten or fifteen days, depending on the weather. For a herd of twenty-five or thirty cows, it is well to allow two acres for each sowing of oats-and-peas, and make three sowings — one as soon as the soil can be worked; the next two weeks later; and the last about three weeks later than the second sowing. The yields should be ten or twelve tons of green feed per acre. A Good Hay. — The areas mentioned for each of these sowings may leave a little each time to be cured for hay. Those dairy feeders who are already familiar with the good feeding qualities of hay made from oats-and-peas will be sure to make the areas large enough to«leave plenty of the crop to be cured for winter use. In cutting it for hay it must not be allowed to get too ripe. If the peas are hard the cows do not like them so well. The cured hay is nearly equal to good clover hay as winter roughage. FARM CROPS 101 When farmers get a larger crop of hay from this mixture than they can from common grasses, they should not depend upon timothy and red top so much in dairy sections. Aside from the yield, we must remember also that the quality of the hay is much better than timothy, for it contains two or three times as much protein or milk-producing substance. There is always a greater yield of oats per acre because of the presence of the Canada peas. A field sown with three bushels per acre, half peas and half oats, will yield more oats than if the sowing were all oats. This is because the peas gather nitrogen for the two, getting it from the air. A Good Grain Mixture. — If the crop should be ripened and threshed, the grain may be all ground together. This pro- duces an excellent balanced grain ration for the dairy cow. Why should dairymen not produce more of their own grain at home in this very way? Oats alone seldom pay for the cost of raising them in the East, but when raised in this mixture they will pay well, providing we have a mill near by where the grinding can be done. Swine and poultry thrive on this grain mixture. Forage for Midsummer. — The foregoing are chiefly very early crops. Other special crops may be grown which will be ready to feed to stock at a time near midsummer when pastures are apt to be too dry to give the stock enough feed. Some such crops were mentioned in the earlier part of this chapter. As we have already seen, this system of green feeding is called the soiling system. Now let us consider the matter of growing such forage crops as will be ready to feed green during the dry season. We can then combine the pasture system with the soiling system — called partial soiling. Corn for Green Forage. — Early sweet corn may be ready for July use. The ears may be used for market and the forage fed to stock. Early flint corn would come along just after it. Next the dent field corn would be fit to use. This would last until frost. 102 PRODUCTIVE FARMING Several plantings of sweet and dent corn may be made through May and June, the later plantings being ready later. It is best to not use these early plantings of corn before they are in the roasting-ear or milk stage. In that condition corn has a good supply of nourishment, but it grows richer as it grows older. FIG. 81. — Black-hulled white kaffir, much grown in dry climates to use in place of corn. (Experiment Station, Kans.) Substitutes for Corn. — Kaffir (Fig. 51) and sorghum are both good substitutes for field corn and have the advantage of being suitable to feed green at almost any stage in their growth, because they are a little more fibrous. Both sorghum and kaffir make rapid growth in warm weather on good soil. The Legume Family. — This is a family of plants of great value to agriculture. The legume family is often called the FARM CROPS 103 clover or pea family, after prominent members of the group. Other common plants included in it are beans, lentils, locust trees, alfalfa, vetches, lupins, cow peas, and soy beans. The growth of characteristic one-sided blossoms and the formation of seed in a pod are distinguishing features of the members of this family. They have power, under proper conditions, of taking free nitrogen from the air for their own use in growing. They have nodules on their roots which are the homes of special kinds of helpful bacteria. It is when these bacteria are present that the plants can use the nitrogen from the air. None but members of this family are thus able to use the free nitrogen. But when the stubble and roots of the legumes decay they leave nitrogen in the soil in a form which other kinds of crops can use. As nitrogen is the most expensive element in purchased fertilizers, farmers should use members of this family often in the rotation courses to secure nitrogen in the soil for all crops. (Page 87.) EXERCISE. — To Become Acquainted with Some Legumes. — The members of the class should bring samples of different clovers, alfalfa, vetch (wild pea), beans, peas, or other legumes. If possible, examine the pods of seed in the heads of clover and on other plants. Note also the one-sided appearance of the blossoms on all of them. The clover heads are composed of many blossoms. EXERCISE. — Nodules on Clover Roots. — Have some of the older pupils dig up roots of clover, alfalfa, or other leg- umes. Wash them and find the nodules or lumps, the size of a pin-head or larger. These are the homes of many bac- teria which aid the clover plants in getting nitrogen. Save the best samples obtained in this exercise by placing them in a bottle of water with a small amount (2 per cent) of formalin added to it. (See Figs. 52 and 55a.) Legumes for Summer Forage. — Farmers should give some attention to the growing of several legume crops and 8 104 PRODUCTIVE FARMING mixed crops for use when pastures are dry in summer, and also for winter forage. There are two summer, or hot weather, legumes which should always find a place in the rotations on a dairy farm. Cow peas (Fig. 53) and soy beans have both been tried so often that their use is no longer an experiment. FIG. 52. — Alsike-clover roots (on left) and garden-pea roots (on right). Useful bacteria live in these nodules and enable the plants to use nitrogen from the air which they otherwise could not do. They have many advantages: Quick, dense growth if sown in warm weather; a big supply of green forage to feed when pastures are dry; very good for hay if cut and cured in dry weather; ten to twelve per cent of protein in the cured crop; a very high content of protein in the ripened seed, especially of soy beans; a big supply of nitrogen and green manure for the improvement of the soil if the crop is turned under, or even if the stubble and roots only are worked in; and the deep roots are a great physical help in most soils. FARM CROPS 105 In a warm spring it is safe to sow cow peas early in June, and the quick-growing varieties will be ready to begin feeding green by the middle of July. Six or seven pecks of seed per acre are sown. By a succession of sowings of two or three FIG. 53. — Cow peas grown in hot weather in eight weeks. They produce good green, feed or green manure. (Experiment Station, N. J.) varieties we can give the cows fresh green forage every day from early July until frost time. Cow=Pea Mixtures. — A larger yield to the acre can be produced by mixing cow peas or soy beans with other crops. We must choose a crop that does best in the hot weather, 106 PRODUCTIVE FARMING such as barnyard millet, pearl millet, sorghum, kaffir, or even common field corn. These all serve as nurse crops and allow the use of taller climbing varieties of cow peas. Under most conditions the mixtures are better for the dairy farmer than the cow peas alone. The mixtures usually cure better if any is left to cut for hay. Splendid winter forage is thus produced. The True Clovers. — The most important clovers of the Northern States are white or Dutch clover, red clover, alsike or Swedish clover, and crimson or scarlet clover. The clovers are the most popular forage plants of the legume family. White clover is a low trailing perennial plant with white blossom heads. It is too low to be useful for hay, but is abundantly grown in pastures. Red cldver is more commonly grown for hay in the North and East than any other legume. It lives about two years. There are two varieties — the common or medium and the mammoth or sapling clover. The latter is coarser and taller and blossoms later. They are both often mixed with timothy for hay purposes. Red clover, if grown alone, will usually produce two crops of hay the year after sowing. The second growth may be saved for seed production, as the bumble- bees, which carry the pollen from blossom to blossom, are more abundant during the latter part of the summer. Alsike clover is more slender and shorter than red clover. It is a short-lived perennial, but it re-seeds itself in the field somewhat. The blossoms are shorter and smaller, so that common honey-bees will work in them and carry the pollen. Thus seed may be formed in the first crop in June. The hay made from alsike clover is finer and better, but the yield is lighter than red clover. These two clovers are often mixed together and with timothy for hay. Crimson clover is an annual plant which is hardy enough to live over winter as far north as the fortieth parallel of FARM CROPS 107 latitude or farther north where soils are favorable (Fig. 48). It is chiefly used as a winter cover crop after early potatoes, or sown in cornfields in July to grow until spring. The following spring it may be plowed under as a green manure cr it may be pastured or used for green forage. Methods of Starting Clover. — There are three methods of starting red clover. < Probably the most common way is to sow the seed in early spring in a field of grain sown the fall before; or with spring grain sown at the same time. After the grain is off in summer the clover soon begins to show. Second, red clover is often given a better start by seeding alone in August or early September, just as for the summer seeding of timothy alone. This plan has the advantage of an extra plowing of the ground after the early crop has been harvested. Weeds are removed and weed-seed sprouted and killed. Lime is applied to a better purpose at that time after the fine seed bed is prepared. A third way is to seed the red clover in the cornfield in August just as crimson clover often is seeded with the last cultivation of the corn. After the corn is cut a stubble cutter is used so the field may be in suitable condition for the use of the mower next season. This rotation and method of seeding is less common, and for several reasons less desirable. Too many farmers allow their hayfields to stand three or more years. In such cases the clover plants die and other grasses, such as timothy and red top, and weeds fill the field. This is a bad mistake if dairy feed is wanted. Too often dairymen are trying to get milk from the feeding of timothy hay. Such grasses usually make only one good cutting a year, with a little aftermath. The clovers are twice as rich in pro- tein, and two good cuttings may be made. Furthermore, quicker rotations are better for the soil. When to Cut for Hay. — Red clover for hay should be cut early, Do not wait until its heads are a third brown. A 108 PRODUCTIVE FARMING better time is when the heads are just beginning to turn brown. This will make hay which has more protein in it and the cows like it better if it is cut early. Permanent Pastures. — A permanent pasture is a field which is used as a pasture each summer and does not enter into any systematic rotation. In some instances the field is used for such a pasture because of the rough surface making, it untillable. It may be too steep or hilly, or too stony, or have too many stumps, or be too low and wet for cultivated crops. In some of these places pastures may be very good if properly maintained. I FIG. 54. — Dump hay-rake used in raking hay into windrows. (Plant Industry.) In still other instances we find permanent pastures on the very best soil and over tillable areas. Good Pasture Plants. — Low white clover, Kentucky blue grass, and timothy are the most popular and best plants for pastures where the climate is moist and cool. There are many other grasses which we often find growing with these, such as red top, meadow fescue, orchard grass, and Canada blue grass. A variety of grasses is best because of the dif- ferent kinds of seasons, and variations in soils. For example, FARM CROPS 109 shallow-rooted plants like wet soils better than the deeper- rooted plants do; some stand drought better than others; some kinds require more lime in the soil than others. Bad Conditions in Pastures. — Too often the permanent pasture is a field of weeds with very little grass to be found most of the summer. The conditions grow worse each year. Little feed is supplied to the cows pasturing there; milk is made bitter and given other bad flavors by garlic, wild onions, and other weeds, eaten by the animals. The number of acres used for the pasture often fools the dairyman into the thought that the cows get plenty of feed from it if they want it. Here is where the trouble begins. The cows do get a fair amount of grass for a while in June. But the change comes; the dry weather strikes it; the grasses are shallow rooted; the result is dead grass. The blossom and seeding time for early grasses comes; this also means death. How to Keep Good Pastures. — The pasture should be filled with good stands of mixed grasses. The farmer should maintain the pasturage to the best of his ability. Certain amendments or improvements are needed from time to time — such as fertilizing, liming, re-seeding, harrowing, mowing, and using a few sheep in the pasture with the cows. Fertilizers and manures, particularly nitrate of soda, may be spread a few weeks before the stock are turned on to the pastures in the spring. Lime should be applied to low meadow land every year or two. Clovers, blue grass, and timothy do much better after the liming. Re=seeding is a good practice. More seed should be sown wherever the grasses are not so thick as they should be. A good time for this is very early in the spring. The thicker we make the grass the less room there is for weeds. Harrowing is quite possible on many parts of most pas- tures. A number of harro wings each spring will pay well. Mowing the pasture twice each year will help to check 110 PRODUCTIVE FARMING the growth of weeds and will prevent many of them from seeding. It also helps the growth of all grasses. The cutting should be made high, as a low cutting destroys too much of the valuable leaf growth of the lower grasses. In a pasture, the tall weeds and tall grasses that have sent up seed stalks should be mown down. The cows do not like them because they are old and fibrous. Sheep may be used in a very rough pasture along r,nth cows to help keep down the weeds. They have a liking for many kinds of weeds and keep them eaten close to the ground. Too many sheep will eat the grasses so close that cows cannot get enough. REVIEW. 1. What do you understand by system or lack of system referred to on the first page of this chapter? 2. After making a farm map, tell whether you think there are too many fields or too few. 3. Eastern farms usually have many more fields than Western farms. Tell of the advantages if any in each case. 4. What are the advantages of having a farm map? 5. What is the spiling system? 6. What are soiling crops? 7. What are some advantages of summer soiling for dairy cows? 8. Why is there need for it in connection with the pasture system? 9. Name some of the crops for spring and early summer soiling. 10. Name some better suited to growth in hot summer. 11. Mention three uses of oats-and-peas. 12. At what stage should this crop be cut to cure for hay? 13. When may soy beans and cow peas be sown? 14. What are some reasons in their favor? 15. Give a list of common plants belonging to the legume family, 16. Give two characteristics of this family. 17. How does the growth of legumes in a field aid the soil ? 18. Why should a farmer use legumes in a rotation with other crops? 19. What does the absence of nodules from the roots of clover tell the farmer? 20. Name four kinds of clover and give the length of life of each. 21. What is the chief use of white clover? 22. Which two clovers are most commonly cut for hay? 23. Tell of the two varieties of red clover. 24. What bees pollinate red clover? What bees pollinate alsike clover? 25. Of what special use is crimson clover? 26. Which of the three methods described for starting red clover is considered the beet? ALFALFA 111 » 27. At what stage should red clover be cut for hay? 28. In what kinds of fields are permanent pastures often found? 29. Name the plants to be grown in the best pastures. 30. Mention some of the bad conditions associated with permanent pastures. 31. Tell of five things to help maintain permanent pastures. t References. — U.S. Farmers' Bulletins: 121, Beans, Peas, and Other Legumes as Food; 464, 531, 545, 660, Weeds; 485, Sweet Clover; 508, Market Hay; 552, Kafir; 535, 567, 568, Sugar Beets; 605, Sudan Grass; 669, Flax; 676, Clover Seed; 677, Market Hay; 686, 724, Sorghum Grain; 688, Rice; 690, Field Pea; 693, Bur Clover; 726, Natal Grass; 730, Button Clover. CHAPTER XI. ALFALFA. ALFALFA is the best milk-producing crop we can grow. It may be used either for green feed or for hay, but in the East it is best not to pasture it. It is so rich in protein that a ton of the dry hay is equal to a ton of bran for dairy cows. It produces heavy yields; the farmer may expect from four to five or even six or seven tons of cured hay each season from an acre. Alfalfa as Green Feed. — As a green feed there is nothing that will excel it. Alfalfa reproduces itself frequently and constantly throughout the summer, by a quick new growth each time it is cut. A good stand of alfalfa on four or five acres will supply all the green feed needed for a herd of twenty-five cows from the latter part of May until the middle of September. A little is cut at a time so as to keep it always rather fresh for the cows. By the time the entire field is thus fed off, the side of the field first cut is again ready for cutting. A Soil Improver. — There is one more strong argument in *avor of alfalfa. growing, viz., it is a soil improver. The roots reach down deep and recover lost minerals such as potash and phosphoric acid. The plant is a great feeder on nitrogen PRODUCTIVE FARMING •from the air. The store of nitrogen in the roots and stubble, when plowed under, will help produce large corn or other crops on that field afterwards. Sprouting Weed Seeds. — An early field of oats-and-peas should be grown in the spring and the stubble plowed under in June or as soon as the crop is all off. The ground is har- rowed about once a week until the middle of August. This makes a good alfalfa seed bed; it controls the soil moisture, and also causes the weeds to sprout and be killed by the harrow. Now if we select alfalfa seed that is free from weed seed, we will have very little or no trouble from weeds in the alfalfa field later on. The seed should be examined with a good reading glass before sowing. Inoculation of Soils. — As alfalfa requires its own bacteria in the soil where it is growing, the grower should get four or five hundred pounds of soil from the nearest alfalfa field and spread it on each acre of the new field. Do this when the sun is not shining so the bacteria will not be killed. It should be harrowed in immediately. These germs in the new soil will be ready to help the young plants as soon as they start to grow (see figure 55a). New alfalfa fields require inoculation before sowing the seed, except in a few parts of the country where certain wild legumes like sweet clover have used the same kind of bacteria. Liming the Field. — Alfalfa is a great lover of lime. It is best to plow the field and apply at least a ton of fine lime to each acre not long before seeding. If some lime was put on that field in early spring before the oats-and-peas so much the better. The Seeding of Alfalfa. — We should be all ready to do the alfalfa seeding by the time the first August rains moisten the ground enough to sprout seeds well. Half a bushel of seed, or thirty pounds, is abundant for one acre. Half of it can be sown the long way of the field and then the last half put in cross-wise of that. In sections ALFALFA 113 where alfalfa is seeded in the spring, it is sown very early, and often with oats. Good Drainage. — The field selected for alfalfa should be well drained and no water should stand near the surface. The roots naturally run down very deep (Fig. 55a) , and they •cannot stand free water at all. A field rich enough and well •enough drained to produce good corn or oats will do for alfalfa. A small application of fertilizer will help to start the crop off well. FIG. 55a. — Nodules or tubercles on alfalfa, showing the characteristic location on fine fibrous roots. FIG. 556. — First growth of alfalfa. Three feet tall. Note the leafy character and fine quality of hay it will make. Cut Four Times a Year. — Do not cut the crop the first fall but allow it to stand until the next May or June before the first cutting is made. That season and each following year the crop should be cut four times (Fig. 56). There are two signs to follow in deciding when to cut any growth of alfalfa. First, never let it get too far along in the blossom stage. Cut it when the blossoms are just showing a little over the field. The second indication of the cutting stage is the slight starting of the buds on the sides of the stems at the surface of the ground. The new growth starting from those buds means that the crop must be cut and removed 114 PRODUCTIVE FARMING very quickly, otherwise the new growth would be much injured. If, at any time, a yellow appearance or any spots on the leaves should be seen, the crop should be cut. The last cutting should be made in September so as to give time for a new growth to start before winter sets in. This will help to prevent winter injury. B FIG. 56. — A. Hay-caps are often used in curing the first cuttings of alfalfa in humid climates. (Experiment Station, N. J.) B. Loading alfalfa by hand power. Curing Alfalfa Hay. — It is sometimes quite difficult to cure the earliest cutting because of the rains late in May and early in June. Alfalfa is very much injured if wet by rain after it is cut. We must keep it dry during the curing pro- cess (Fig. 56, A). The sap in the stems does not do so much injury; so it may be put in the bam with more of its own ALFALFA 115 moisture than almost any other hay crop. If allowed to get too dry before hauling in it will lose many leaves, and Fio. 57. — Push power sweep rake used in taking hay to a stack in the field. (Plant Industry.) they are the best part of the crop. With a little care alfalfa can be cured in perfect condition, because the time required for curing is not long (Figs. 57, 58). •—•—-:-• FIG. 58. — Hay-stacking machine. The hay is taken from the sweep rake (Fig. 65) and lifted to the stack by horse-power. Notice the horses at the end of the rop». (Plant Industry.) Eleven Alfalfa Rules. — For the sake of brevity let us summarize the chief points in alfalfa management. The following eleven rules are quite comprehensive: 116 PRODUCTIVE FARMING 1. Lime the soil by applying about one ton of lime per acre just before sowing the seed. 2. Inoculate the new alfalfa field by spreading and har- rowing in about five hundred pounds per acre of good soil from an old alfalfa field when the sun is not shining. 3. Have the soil as free from weed seed as possible by using a bare fallow for a few weeks before seeding. 4. Be sure that the alfalfa seed is perfectly pure and free from weed seeds. 5. Use plenty of seed, about thirty pounds per acre, sow- ing it both length-wise and cross-wise of the field. 6. Use good fertile soil and apply some high-grade fertilizer about the time of sowing the seed. 7. Always select a well-drained field for alfalfa. 8. Cut the crop often — about four times a year, beginning with the spring following the August sowing. 9. Cure the hay carefully to avoid shattering of the leaves and to avoid its getting wet with rain. 10. Do not use the field for pasture, particularly while it is young. 11. Harrow stubble after cutting. REVIEW. 1. Give several arguments in favor of growing alfalfa. 2. Tell of the use of alfalfa as a green dairy feed. 3. In what ways does alfalfa improve the soil where it is grown? 4. Give three benefits of a few weeks of bare fallowing before the August seeding of alfalfa. 5. Tell how a new alfalfa field may be inoculated with the bacteria which the plants need. 6. How much lime should be spread, and when? 7. Give time, amount, and manner of seeding alfalfa. 8. Which is better for alfalfa, upland or lowland? Why? 9. Tell of two things which indicate when to cut alfalfa for hay. 10. Tell one difficulty in curing alfalfa hay; and mention one advan- tage over other kinds of hay, in its curing. 11. Give briefly the eleven points covered by the eleven alfalfa rules. References.— U. S. Farmers' Bulletins: 339, Alfalfa; 382, Adulter- ation of Forage-plant Seeds; 495, Alfalfa Seed Production; 636, Chalsis Fly in Alfalfa Seed; 637, Grasshopper Problem and Alfalfa. COTTON 117 CHAPTER XII. COTTON PRODUCTION. THE cotton plant was cultivated in the Old World in the earliest historic times. It probably originated in India or China. The ancients of India wove the fiber into very good cloth. Alexander the Great introduced the plant into Europe. Cotton was also grown by the natives of Mexico and South America before the discovery of the New World by Columbus. To Virginia belongs the credit of first starting the culti- vation of cotton in the American Colonies. This was in 1621. After that it rapidly became a leading money crop of the farmers of the South. The labor of removing the lint from the seeds greatly reduced the profit from this crop for many years. It was a day's labor to separate the seeds from one pound of cotton. But in 1792 the cotton gin was invented by Eli Whitney. This machine, as improved later, greatly increased the profits of cotton raising. Importance of the American Cotton Crop. — Cotton is far the most important fiber crop of the world. Twelve Southern States now supply more than two-thirds of the cotton of the world. All nations make clothing from Ameri- can cotton. We sell more cotton to other countries than all other agricultural products combined. Other countries producing large amounts of cotton are British India, Egypt, Russia, China, Brazil, Mexico, Peru, Turkey and Persia. But all of these combined produce only one-half as much cotton as is grown in the United States. The ten leading States in the production of cotton are in the following order: Texas, Georgia, Mississippi, Ala- bama, South Carolina, Arkansas, Oklahoma, North Carolina, Louisiana and Tennessee. Uses of Cotton. — The fibers of the commonest cotton are only about one inch long, but they become very much 118 PRODUCTIVE FARMING twisted as they ripen (Fig. 59a). This twist causes them to cling together well to form thread when put through the spinning process (Fig. 596) . The thread may then be woven Courtesy of Johnson & Johnson. Fio. 59a. — Individual fibers of long-staple or Sea Island cotton. The lengths of the five are about equal. The ripest are very kinky. (After Brooks.) FIG. 596. — Slivers or hanks of cotton in different steps of making thread or yarn. The factory names are: 1, drawing hank; 2, stubbing hank; 3, intermediate hank; 4, roving hank; 5, yarn or thread. FIG. 60. — Modern looms, all weaving white cotton cloth. One person can oper- ate twelve to sixteen such looms at a time. Each machine makes seven square yards of cloth per hour, using 3,024 yards of yarn to each yard of cloth. into cloth (Fig. CO), or formed into rope. The longest fibers of lint are desirable for use in making sewing thread, and in mixing with the shorter fibers in certain grades of cloth. COTTON 119 Exercise. — Examine the fibers of cotton from a cotton boll or from a roll of cotton. Notice how minute they are when seen separately. Try twisting a few of the fibers to- gether to form a thread. Pull them along as you twist them and they will gather up more fibers from the pile of cotton. The Cotton's Relatives. — The cotton plant belongs to the same family of plants as the hollyhocks, okra, althea, mallow weed, and many others. The group is called the mallow family. Types of Cotton. — There are several different types or kinds of cotton. Those grown in the United States are all annual, that is, they are all killed by freezing in the fall ; but in tropical countries they live for many years. Even here the plants sprout up from the old root after a mild winter. Cotton grown in this country is chiefly of three kinds: (1) Common or Short-staple upland cotton, (2) Long-staple up- land cotton, and (3) Sea Island cotton (Fig. 59a). Important kinds grown elsewhere are (1) India cotton, with very short staple, (2) true Peruvian or Egyptian cotton, with long staple, usually brownish in color. American Upland Cotton. — As shown above, the upland cotton is of two kinds, short-staple and long-staple. Together these make up all of the American cotton crop, except the Sea Island cotton, grown in small amounts, chiefly near the Atlantic and Gulf coasts. Short-staple differs from long-staple cotton in length of the lint which surrounds the seeds. Short-staple is from % to 1% inches long (Fig. 61), and long-stable is usually 1% to 1% inches long. These varieties may also differ in other ways. The long-staple plants are taller, later in maturing and have slender, pointed bolls, with less lint. But the long- staple sells for a higher price. Sea Island Cotton. — This gets its name from the fact that it originated in the West India Islands. It grows well on the islands and mainland within one hundred miles of the coast. Georgia, South Carolina and Florida are increas- 9 120 PRODUCTIVE FARMING ing the growth of the Sea Island cotton. The price of this type of cotton is high because of the great value of such long fibers in making spool cotton for sewing. , This plant grows rather taller than upland cotton, has long, flexible branches; Courtesy of Johnson & Johnson, New Brunswick, N. J. FIG. 61. — Four grades of lint, showing length of fiber, from samples of short- staple upland cotton. The relative amounts are also indicated by the masses in the photograph. the leaves are more deeply lobed; the flowers are yellow instead of white when freshly opened; the staple is longer, and the seeds are free from lint after ginning. COTTON 121 Improvement of Cotton. — Cotton growers are able to improve their crops very greatly by the proper selection of varieties and selection of seed from heavy yielding plants. As usually grown here the plant is either erect or bushy and varies in height from three to eight feet. The length and arrangement of branches are indications of earliness and productiveness. Cotton itself has other desirable qualities, such as strength of lint, fineness, and uniformity of color. Im- provement of cotton is best accomplished by selecting seed from plants with such desirable qualities. The yields of cotton may be greatly increased by proper fertilizers, good rotations, early planting, securing a good stand of plants and frequent tillage. Selecting Seed.— The grower should select the seed just be- fore or during the second picking, and avoid planting seed from later pickings. Select bolls from thrifty plants with compact growth of branches. The branches should have short nodes or joints and be abundantly supplied with bolls. Always select the largest bolls with long fiber. Avoid picking for seed from any unhealthy plants. Avoid also those bolls where the cotton tends to fall to the ground, as such are not " storm proof." If a grower is to purchase cotton seed for planting, he should select such varieties as will best resist disease. Varieties of upland cotton most abundantly planted are Peterkin, Truitt and Russell. In Texas, where the boll-worm and boll-weevil insects are present, Triumph is commonly grown. Other pro- ductive varieties suited to special soils or seasons are : King, Cook, Cleveland, Toole, and Layton. The Alabama Experi- ment Station reports over 200 varieties of cotton grown there. It is usually best for growers to select their own seed for planting. In every field the plants vary through all degrees from very good to very poor. By carefully selecting as above suggested the next crop can be greatly improved. Range of Cotton. — Cotton needs a long growing season, with six or more months of warm growing weather free from frosts. This condition is found chiefly south of latitude 37°. 122 PRODUCTIVE FARMING It is desirable to have an abundant rainfall evenly distributed through the growing season, but with plenty of sunshine at least during the ripening months. Soil. — Cotton prefers a medium loam, but will thrive in almost any good farm soil if the conditions of temperature and rainfall are favorable. The soil should be deep, as the plant has a tap root and is a, deep feeder. If there be a clay subsoil it should be down about two feet from the surface. Good drainage is important, but there should be enough humus present to cause the soil to hold moisture well. When cotton is grown each year on the same field it is well to grow some crop for green manure between the rows of cotton, to be plowed under in the fall or the next spring. Such crops might be cow peas, peanuts, or soy beans. As legumes to grow all winter in the cotton field it is well to use crimson clover, and winter vetch, which may be sown in the cotton field in early fall, or just after the fall plowing (Fig. 48). On poor sandy soil the rust disease of cotton is worse than on loams or heavy soils. If the soil is too rich, as along some rivers, the cotton plants grow large and coarse without developing much cotton. Preparation of Soils. — Unless there is a winter cover crop growing in the field, it is best to plow the soil for cotton in the fall. This helps to get rid of the boll-worm and boll- weevil, sprouts the waste cotton seed in time to be killed by freezing, and the old stalks are turned under in time to decay and form humus. When cotton was grown on the field the preceding year, the disposal of the stalks and litter is a serious difficulty. Sometimes they are pulled and burned, but this is bad practice. It is better to beat the stalks to pieces on a frosty day, or drag them down with a heavy iron bar, or cut them to pieces with a stalk cutter made for the purpose. After they are broken or cut to pieces they may be readily plowed under. The plowing should be thorough and complete, and the deeper the better if no bad soil is brought to the surface by COTTON 123 so doing. If this broadcast plowing is done in the fall, the soil may be plowed up into ridges or beds in the spring ready for planting. The best cotton growers are rapidly adopting this plan of " double preparation " of the soil — first plowing and then ridging. A crop of green manure may be grown on the land after the fall plowing. This is particularly desirable if the soil is very light. Small grains, winter vetch or crimson clover may be used. The ridges may be formed in spring either with a turn- ing plow or with a disk-harrow if the field has been first plowed in the fall. The plan of forming low ridges or beds with the disk-harrow is better, more rapid and less expensive. The rows for planting are marked off with a shovel plow and commercial fertilizer is usually distributed in this row. Simple drills are also in use which form the furrow, spread the fertilizer and then draw some soil over it. Fertilizers for Cotton. — The crop of cotton itself is n« hard on the soil if the cotton seeds or their equivalent be returned to the field. The cotton seed is fed to stock and the stable manure is returned to the field without much loss in fertility. If the seed is sold, the grower should buy enough fertilizer to take its place. For every 100 pounds of cc/tton seed sold a return should be made of 3 pounds nitro- gen, 1 pound phosphoric acid and 1% pounds potash. In addition to this a liberal allowance should be made for losses from the soil by washing and leaching. If green manures are used by growing legumes, the nitrogen supply will be kept up and humus will be formed. Most cotton soils have an abundance of potash; but they respond readily to increased applications of phosphoric acid, increasing the yield of bolls and lint, and forcing earlier ripening. Too much nitrogen may cause a rank, " weedy " growth with little cotton. Too much potash delays the ripening of the crop. Planting. — The distance between cotton rows is 3K to 4 feet, and 12 to 18 inches are allowed between plants in the row Allow about 1 to 1}£ bushels of seed per acre to insure 124 PRODUCTIVE FARMING a good stand of plants. Planting begins about two weeks later than the date of the last killing frost. March 10th or 15th is often the time for beginning the planting near the Gulf coast; April 1st to 10th near the central latitude of the cotton belt; and early May in the northern limits of cotton growing. There are several forms of cotton planters which are not expensive. A good machine will drop the seed uniformly in a small furrow and cover it with an inch or two of soil. Exercise. — Let some member of the class write to the U. S. Weather Bureau, at Washington, and get a table or report which will show the dates for the last spring frosts for a number of years past. From this report let the class determine the best date for beginning the planting of cotton. Cultivation. — A weeder or light harrow should be used over the field before planting and also after planting. This broadcast tillage will prevent small weeds from getting started ahead of the cotton plants and will also prevent the soil from becoming crusted. A weeder should also be used over the young cotton plants just before the thinning process begins. This may not be advisable if the stand is thin or the ground very stony or otherwise rough. Thinning of the plants is usually necessary. This is done by chopping out the surplus plants with heavy hoes. It is a good practice to culti- vate the individual rows, setting the shovels to throw the soil away from the plants, just before the thinning or chopping begins. Subsequent cultivation should move the soil back toward the plants. The cultivation should be frequent and shallow. It is continued until about time for picking to begin. When the plants completely shade the soil, a crust is not apt to form and further cultivation is not so necessary. Harvesting. — Although several machines have been invented for harvesting cotton, none have come into general use, and the cotton crop is picked by hand. It is the most expensive part of cotton production (Fig. 62). The price paid to pickers varies from 40 to 80 cents per hundred pounds COTTON of seed cotton, or about six to twelve dollars per bale of 500 pounds of cotton. A picker can readily average 200 pounds of seed cotton per day. The fields have to be gone over several times as the bolls do not all ripen at once. The har- vesting of cotton runs through September, October and November, and should be finished before December. The most productive fields will grow more than two bales per acre, and many more fields exceed one bale per acre, Courtesy of Johnson & Johnson, New Brunswick, N. J. Fio. 62. — A typical cotton-picking scene. but in spite of these high yields the average for the cotton belt is only 200 pounds or two-fifths of a bale per acre. On the United States " demonstration " farms in South Carolina the recent average yield per acre was nearly 600 pounds, while on similar farms in that State the average was less than half as much. The yield in Louisiana, due to the United States " demonstration " methods, was increased from 380 up to 760 pounds per acre. These facts show the value of studying and using better methods in cotton production. Problem. — A man increased his cotton yield from 200 up to 800 pounds per acre by selecting seed properly. The extra cost for such work may be estimated at 75 cents per acre. If he grows 22 acres of cotton, what is his profit due to seed selection, the selling price being 10 cents per 126 PRODUCTIVE FARMING pound? (Consider the extra work of picking and ginning as balanced by the increased seed yield.) Preparation for Market. — A public ginnery is usually found in any section where cotton is raised. The seed cotton is hauled from the field to the cotton gin. The suction pipes lift it from the wagons and take it to the gin stand, where it is taken over fine-toothed revolving circular saws. These saws separate the lint from the seeds, which are kept from passing along over the revolving saws by means of long stationary teeth or combs. The seeds may be stored in a, seed room of the ginnery or may be returned directly to the grower's wagon. The white lint (Fig. 63) is carried by the machine into a large hydraulic press, where it is covered with coarse bagging and bound by iron bands into bales of about 500 pounds each (Fig. 64). Baled cotton is too often exposed for months without shelter from the weather. This may darken and weaken the outer layers and reduce the selling price of it all. Most cotton intended for shipment a long distance is put through a compressor to reduce the size of the bales. Market Grades of Cotton. — The price paid for cotton at any time is governed by the grade or quality. The grade is determined by samples taken from the bales. When a grower sells his cotton, the buyer usually does the grading. The seven principal market grades of cotton in order of value are: (1) fair; (2) middle fair; (3) good middling; (4) middling; (5) low middling; (6) good ordinary; and (7) ordi- nary. There are sub-divisions of these principal grades which are designated by prefixing such terms as "strict," "fully/' or "barely." Most of our American cotton is poorer than middling fair, and grades as high or higher than middling. By=products of Cotton. — The chief by-product of the cotton crop is cottonseed. This is now used for several purposes. The hulls are removed by machinery. Oil is extracted from the kernels by cooking and pressing. Cotton oil is used in making salad oils, cottolene, oleomargarine, COTTON 127 irtesy Johnson & Johnson. Fia. 63. — Inside view of ginnery, showing sheet of loose cotton lint as it cornea from the cotton gin, just before baling. i*hoto. by Russen, Anniston, Ala. Courtesy Johnson & Johnson. FIG. 64. — A local cotton market in Alabama, showing common form of bales. The cotton ia too often thus exposed to weather without shelter for several months. 128 PRODUCTIVE FARMING soaps, and other articles. The remaining part of the seed after pressing out the oil is ground into cottonseed meal and used for stock feed, particularly for dairy cows. (See com- position in Appendix Table VIII.) It is also used as a fer- tilizer as it is so rich in nitrogen. The hulls are also used for stock feed and fertilizer. • In ginning the cotton for one bale, nearly 1000 pounds of seed are obtained. This amount of seed at the oil mill will produce about the following numbers of pounds: Oil 150; cottonseed hulls 400; cottonseed meal 375; linters, trash, and dirt 75. The fibers of the stems and branches of the cotton plant are sometimes used in the manufacture of coarse grades of bagging. Diseases of Cotton. — Cotton wilt, cotton rust and cotton root-knot are the most common diseases likely to affect the crop if it is grown year after year on the same soil. If a good rotation of crops is kept up as with corn, wheat, and legumes, there is little danger from disease. Insect Enemies. — The cotton plant is not seriously affected with insects except in the squares and bolls. Two insects do most of this damage, the boll-weevil and the boll-worm. The Mexican boll=weevil has now spread over the south- eastern and central parts of Texas, much of Louisiana and the adjacent portions of Mississippi, Arkansas and Oklahoma. The area is increasing rapidly. In those sections only such farmers as practice the best methods of cotton culture are able to continue raising the crop successfully. As this insect spreads over the cotton belt it causes much change in the methods of growing the crop. When the insect appears in early summer, it first attacks the buds and the flower leaves, called "squares" (Fig. 65a). These soon fall to the ground. The earliest buds may escape the injury and develop bolls and cotton. COTTON 129 There are several methods of preventing damage from boll-weevil : Smith's Economic Entomology. FIG. 65a. — Cotton square, showing boll-weevil in position. Natural size. (After Hunter.) FIG. 656. — Cotton-worm from side and above. 1. By forcing the cotton crop to early maturity much of the loss due to weevils is overcome. The grower should 130 PRODUCTIVE FARMING force his crop to set many bolls before weevils are abundant. Only the late buds will then receive the attack of the enemy. Forcing is done in several ways : . (a) Prepare the soil thoroughly and early. (6) Plant early and use enough seed for a good stand of plants. (c) Cultivate often during the growing season. (d) Grow varieties which set bolls early. (e) Select seed from early fruiting plants. (/) Apply phosphoric acid fertilizer liberally. 2. Pick the cotton crop as early as may be, and immedi- ately destroy the entire field of plants for the purpose of starving the weevils several weeks before cold weather drives them into winter quarters under trash. The prompt destruc- tion of the plants after harvest may be done in either of two ways: (a) cattle may be turned into the field in such num- bers as to eat all leaves and young* growth, after which the stalks are promptly cut up and plowed under well, (b) The stalks may be pulled and burned. 3. Poisoning the early spring weevils on the growing tips of cotton plants is sometimes tried. For this purpose arsenate of lead is applied in the form of powder at the rate of 2% pounds per acre. This must be done before the appearance of the first squares. 4. Buds and squares which fall to the ground from the attacks of weevils should be caused to wilt very soon and thus prevent the further development of the insects which would soon form another brood. The wilting may be has- tened by planting the rows far enough apart to let sunshine in freely. The wilting is also increased by dragging the buds and squares to the open sunlight of the "middle." This is done by the use of a special chain cultivator devised for the purpose. The boll-worm (Fig. 656) does not confine its attention to cotton, but prefers young corn and tomatoes (Fig. 66). It is the same insect which we call the corn "ear- worm." COTTON h's Economic Entomology. FIG. 66. — Work of cotton- worm or corn ear- worm, on corn and tomato. 132 PRODUCTIVE FARMING After the nearby corn crops have passed the tender stage of the ears the future broods attack the squares and bolls of the cotton field. The best remedies are based upon this habit of the insects : 1 . Produce an early crop by the methods already sug- gested. Thus the cotton crop will be too far advanced to be injured when the attacks of the boll-worms begin. 2. Use corn as a trap crop by planting at several different times, either near the cotton field or alternating three rows with every thirty rows of cotton. As the corn passes the tender stage it may be fed to cows, and the young insects thus destroyed (Fig. 66). 3. Plow the fields in the fall to destroy the winter quarters of boll-worms. REVIEW. 1. Tell something of the early history of cotton growing. 2. How did the invention of the cotton gin help the cotton in- dustry of the world? 3. Name the leading cotton growing States of America. 4. In what ways are the other States of the Union interested in this great crop? 5. What fraction of the world's crop do we produce? 6. What other countries are important cotton producers? 7. What three types of cotton do we grow? 8. Describe the best climate and best soil for cotton. 9. Give some reasons for plowing cotton fields in the fall. 10. Give other steps in the preparation of soil for cotton planting. 11. Tell of the uses of a weeder on a cotton field. 12. Give distances and methods of planting cotton. 13. Tell all you can about the picking of cotton. 14. How does a cotton gin pick the lint from the seeds? 15. Mention the seven principal market grades of cotton; which three are most commonly produced here? 16. Mention several uses of the different by-products of the cotton crop. 17. What is the best remedy for the cotton diseases mentioned? 18. Where is the Mexican boll-weevil now most destructive? 19. Mention four ways of combating this insect. 20. Mention six ways of forcing an early cotton crop. 21. Give three ways of fighting the boll-worm. References.— United States Farmers' Bulletins : 501, Cotton Improvement under Weevil Conditions; 512, Boll Weevil Problem; 555, Cotton Anthracnose; 577, Egyptian Cotton in Arizona; 591, Grading of Cotton; 601, New Methods of Cotton Culture; 625, Cotton Wilt and Root Knot; 735, Red Spider on Cotton. CORN 133 CHAPTER XIII CORN. WHEN America was first explored the natives were grow- ing this crop, hence the name Indian com. The plant was not known hi the Old World before that. It has been much improved by breeding and selection since that time. Importance. — It is far the most important field crop now grown in the United States. In money value it is more than double OUT wheat crop or cotton crop, in the average year. In number of bushels corn is approximately four times as large as any other grain crop of America. Probably three- fourths of the world's corn is grown in the United States. Although the crop is grown to some extent in every state of the Union, the seven "corn belt" states grow from one-half to two-thirds of the crop. These states are Illinois, Iowa, Nebraska, Missouri, Kansas, Indiana, and Ohio. The Corn Crop. — Corn is king and alfalfa is queen. These two crops go together very well. On dairy farms, where these two crops are raised for the stock, we find very little outside feed is purchased. They cut down the feed bills enormously. Too few farmers in the dairy sections are trying alfalfa; and too many farmers are not doing their best even in the corn fields. Winter is the time to make plans for the corn crop for the following spring. If the seed is not on hand it should be secured and tested for its germinating powers. Whiter is a good time to plan the fields and decide how much corn ground will be used for production of green forage, how much for ensilage, if any, and how much for whiter fodder and ears. Types of Corn. — The four main types of corn raised in America are pop corn, sweet corn, flint corn, and dent corn. The last two are both spoken of as field corn. 134 PRODUCTIVE FARMING Flint Corn has a hard kernel which is short and rounded, with no dent in the top. There are only a few rows of kernels on the cob, eight rows being quite common. Flint corn ma- tures quickly and is often grown where the warm season is short. There are several colors and a number of varieties (Fig. 67, Nos. 4, 10, 12, 14). Dent Corn has a longer kernel with a dent in the crown or top. The ears are large and the yield per acre is greater than with any other type. The many varieties or breeds of Fio. 67. — Corn kernels of 'different shapes. Number 3 is one of the best. cultural Education.) (Agri- dent corn vary in color, length of season for ripening, shape of kernel, size, shape, and length of ear, character of stalks, and in other ways. White and yellow are the commonest colors. The people in certain sections prefer white varieties, while in others the yellow corn is grown entirely. Corn does not vary in quality because of its color, but when white or yellow meal is preferred hi certain markets the millers will buy corn of that color only. EXERCISE. — Kinds of Corn. — Have some of the best CORN 135 samples of the different types of corn brought to school by pupils. The ears should be wrapped in paper to prevent shelling. These may be compared and studied by use of a score card. Save the ears for future use in corn testing. Rules for Selecting or Judging Corn. — Seed corn should always be purchased on the cob if possible. Then we can tell whether the ears are of the type we want, or not. Too often the shelled corn we get comes from ears we would not try to grew if we saw them. The following explanation of points should be used in selecting corn for seed, and also in judging corn at exhibits. FIG. 68. — A. Exhibit of Boys' Experiment Club in Nebraska. (Agricultural Educa- tion.) B. Prize-winning corn and the boy who grew it. (O. B. Martin.) The corn exhibits may be held at school each winter and the score card used by the students and the judges. Ten ears of corn will constitute a sample. 1. Trueness to Type or Breed Characteristics. — All the ears selected should possess similar or like characteristics, and should be true to the variety which they represent (Fig. 68). Two representative kernels should be taken from each ear and placed germ side up in front of the ear and studied hi con- nection with type in the ear. 2. Shape of Ear. — In shape the ears should conform to variety type. Each ear should be full and strong in the cen- 10 136 PRODUCTIVE FARMING tral portion and not taper too rapidly toward the tip. This is indicative of strong constitution and good yield (Fig. 69). 3. Purity of Ear; (a) Grain. — In color the kernels should be true to variety and free from mixture. Difference in shade of color, as light or dark red, white or cream color, must be scored according to variety characteristics. (6) Cob. — An ear of white corn should have a white cob ; yellow corn should have a red cob; if mixed, mark it zero. A mixture reduces the value of the corn for seed purposes, indicates lack of purity, FIG. 69. — Good seed corn. The upper ear shows good even rows with very narrow spaces between rows and between kernels. Ihe tips of the cob should be covered with corn. There is a good deep impression and small stem shown at the left. The kernels are deep as compared with the size of the cob, as shown. (U. S. Farmers' Bulletin 229J and tends toward a too wide variation in time of maturity, size, and shape of kernels (Fig. 70). 4. Vitality or Seed Condition. — Corn should be in good market condition; show good constitution, and be capable of producing plants of strong, vigorous growth and heavy yield. All indications of freezing or other injury from exposure and all evidences of immaturity show poor vitality. Corn with adhering chaff, or a black tip, caused by the tip cap adhering to the cob, is not in good condition. 5. Tips (Fig. 69) should be regular, uniform, and prop- erly proportioned with the body of the ear. The rows should CORN 137 be well carried out and the kernels conform closely to those in the main body of the ear in shape and size. The propor- tion to tip covered or filled must be considered. Long pointed tips as well as enlarged or double tips are objectionable. 6. Butts. — The rows of kernels (Fig. 69) should extend in regular order over the butt, leaving a deep depression when the stem is removed. Opened and swelled butts, depressed and flat butts with flattened glazed kernels are objectionable. 7. Kernels. — (a) The kernels should be uniform in size and shape, making it possible so to grade the corn as to secure Fio. 70. — Large cob on the left with small layer of corn. Small cob on the right with deep layer of corn. even dropping by the planting machine. This is essential to securing a good stand. Not only should the kernels be uni- form on the individual ear but they should be uniform with all the ears selected. (6) The shape of kernels should be such that their edges touch from tip to crown (see Fig. 67, 3). The tip portion of the kernel is rich in protein and oil, and hence of high feeding value. Kernels with large germs insure strong, vigorous growth as well as richness in quality of kernel. Germs should be large, showing strength and high feeding value (Figs. 71, 72). 138 PRODUCTIVE FARMING 8. Length of Ear. — The length of the ear varies according to variety, type and the characteristics sought by the indi- vidual farmer. Uniformity of length is. to be sought in a sample, and a sample having even length of ears should score higher than one that varies, even if it is within the limits (Fig. 73) . The usual length of ears for the northern section for dent corn is 7 to 9 inches; central section, 8j/£ to 9J^ inches; soutb- FIG. 71. FIG. 72. FIG. 71. — Sections and surface views of kernels of corn. The three on the right snow large germs and have much protein, those on the left small germs and less protein. (Agricultural Education.) FIG. 72. — Diagram of a section of corn kernel, enlarged, showing the locations of starch, embryo, horny part rich in protein, and the protein layer under the hull. In kernels where the germ is large and the horny part is large toward the tip there is much protein. Such corn makes the best feed and should be selected when choos ing seed corn. ern section, 10 to 12 inches. Very long ears are objectionable, as they usually have poor butts and tips, shallow kernels and hence less corn on the cob. Same varieties produce several small ears on each stalk. 9. Circumference of Ear. — The circumference of the ear should be hi symmetry with its length. An ear too great in circumference for its length is generally slow hi maturing, and too frequently results in soft corn. Dimensions for the north- CORN 139 ern section for dent corn are 6^2 to 7 inches in circumference; central section, 6J4 to 7J4 inches; southern section, 7 to 8 inches. Measure the circumference at one-third the distance from the butt to the tip of the ear. 10. (a) Furrows Between Rows.— The furrows between the rows of kernels should be of sufficient size to allow the corn to dry readily, but not so large as to lose in proportion of corn to cob. (b) Space Between Tips of Kernels at Cob. — This is very FIG. 73. — Finest corn in the world. These ten ears won a thousand-dollar prize at Omaha in 1908. (Agricultural Education.) objectionable, as it indicates immaturity, poor constitution, and poor feeding value. 11. Proportion of Corn to Cob. — Depth of kernels, size of cob, maturity, furrows and space at cob all affect the propor- tion. The corn may be selected and judged by those features. But if scales are available the proportion of corn is determined by weight. In determining the proportion of corn to cob, weigh and shell an average ear in the sample. Weigh cob and subtract from weight of ear. This will give weight of corn; divide weight of corn by total weight of ear, which will give per cent of corn. Per cent of corn should be from 86 to 87. For each per cent short of standard, a cut of one and one-half points should be made. 140 PRODUCTIVE FARMING SCORE CARD FOR CORN JUDGING. Perfect Score. 1- Trueness to Type or Breed Characteristics 10 2. Shape of Ear." 10 3. Purity of Ear. (a) Grain 5 (6) Cob 5 4. Vitality or Seed Conditions 15 5. Tips 5 6. Butts 5 7. Kernels, (a) Uniformity 5 (6) Shape 10 8. Length of Ear 5 9. Circumference of Ear 5 10. (a) Furrows Between Rows 5 (6) Space Between Tips of Kernels at Cob 5 11. Proportion of Corn to Cob 10 Total Points.. ..100 Testing Seed Corn. — No farmer can 'afford to use corn for seed which is not the best he can get. It should be care- fully selected along the lines laid down in the rules given in this chapter. Then it should be subjected to a germination test of the individual ears. Any method that will enable a corn grower to know the percentage of germination of each individual ear of corn can be used to make the test. If you test five kernels taken from different parts of an ear of corn and two of them do not germinate and three do, it is a pretty good indication that sixty per cent of the kernels of the ear will grow and forty per cent will not. This means that four hundred out of a possible one thousand kernels of that ear will fail if planted in the field. The farmer using such corn for seed would get only a sixty per cent stand, which means a very poor crop. He would waste two days out of every five spent in cultivating such a field, because two-fifths of the field would be bare ground. How to Test. — The ears of corn may be tested as clearly shown in Fig. 74. First arrange a germination box; any shallow flat box will do; place in it some clean wet sand or wet sawdust to a depth of about one inch (Fig. 75). CORN 141 Mark off squares two by two inches with a black lead pencil on white cloth; number these squares 1, 2, 3, etc.; wet the cloth and spread it over the wet sawdust so the numbers are in plain view. Next number all the ears of corn by using FIG. 74. — A box tester for seed corn. Upon muslin cloth squares are drawn and numbeired. On each square are laid five kernels from an ear of the same number. When the tester is filled, the sawdust shown at the left is placed to keep the grain moist. little squares of paper, which are held to the butt end of the ears with small nails pushed through the numbered papers and then into the cobs. Now take five kernels from different parts of each ear, not using any from near the tip nor butt. FIG. 75. — A. Testing individual ears of seed corn by the moist cloth method. The tray is ready to be covered with another wet cloth and moist sawdust. B. The tray of corn shown in Fig. A. Put the five kernels from the first ear on the first square of cloth, and so on for the rest of the ears (Fig. 75). It is well to place the germ sides upward so the sprouts will show well afterwards. Cover the kernels with a plain wet cloth and 142 PRODUCTIVE FARMING spread over it a layer of wet sawdust. Keep the box in a warm room for two weeks or less, keeping it damp all the time. FIG. 76. — Germination test of com, showing; healthy and weak germination. (Agri- cultural Education. ) The Results. — Raise the top cloth and thus remove the upper layer of sawdust. Look over the germination cloth and see what ears fail to give a perfect result. These should be removed and not used for seed (Fig. 76) . **" ,- Ft LH HI : ^ £ • t 4 6 6 to IS 14 K> 18 90 tt £4 26 23 M X f> 1 A 5 7 9 11 Id IB 17 19 21 II 25 «7 » I F S C R. £. Fin. 7Ga. — Rag doll tester for individual ears. Rag Doll Tester. — One of the simplest methods of test- ing corn, or seed of any kind, is to roll it in wet cloth and keep it damp until it has time to germinate. The individual ears should be numbered before the test. Take a piece of cloth, say 12 by 36 inches. Mark it off in the manner shown in the diagram (Fig. 76a), using a soft black pencil. Take five kernels at random from the first ear to place on space numbered 1. Continue this for the thirty ears. CORN 143 Do not use kernels from the butts and tips of the ears. Fold the cloth edges over the corn to hold it in place. Lay your pencil across the end and roll the cloth up carefully. Put a rubber or string around it and the "doll" is made. In farm practice a number of cloths may be used so as to test enough seed for large fields. The thirty ears on one cloth might be enough for two acres. Soak the "dolls" in water for about one day. Then remove from the water and place in a covered jar to keep them moist a few days until germination takes place. Then unroll carefully and examine and decide what ears are low in germination. Write down the percentages for list of numbered ears in your note-book. Then locate and dis- card the ears that are not good for planting. i CORN CULTURE. Soil and Fertilizers. — It hardly pays to try to grow much corn on poor soil. There may be other crops, such as cowpeas or oats, that would thrive on poor soil better than corn. Rather rich medium or heavy loam is admirably adapted to corn growing. If moisture conditions are favor- able corn may be grown on a wide variety of soils. The lighter soils may become too dry in the summer, and the undrained muck soils may remain wet and cold in the early part of the growing season. The latter soils may produce heavy growths of stalks and leaves, but fail to mature much sound grain. Barnyard manure should be applied to uplands for the best growth of corn, as organic matter and nitrogen are very beneficial for the crop. Heavy soils are much improved by plowing under green manure crops and barnyard manure. Preparing the Soil. — The best corn growers insist on the early plowing of the ground for corn, unless it was fall plowed. It should be plowed a month or six weeks before the date of planting. If the ground was in sod, the disc harrow may be used soon after the plow. During the balance cf the time the 144 PRODUCTIVE FARMING smoothing harrow should be used every ten days or soon after each heavy rain. This is to prevent the crusting of the ground and the loss of moisture. Each harrowing of the ground helps to keep the moisture in the soil where it will be ready for the roots of the corn next summer when the dry weather sets in. In regions where the soil is heavy the field should be well stirred up again just before planting, using a spring-tooth harrow, disc harrow or a pulverizer set very deep. Methods of Planting. — Corn is usu- ally planted either by hand-power planters or horse-power planters. The depth to plant varies with the quality and moisture of the soil. In a moist clay loam one inch is deep enough; but in a dry, sandy soil three or four inches is better. EXERCISE. — Depth to Plant Corn — Plant corn at several different depths in two kinds of soil, one rather dry and sandy, the other heavy and rather moist (Fig. 77). These should be in two separate bottles or boxes. In each case, note the time required for the young plants to reach the surface. Distances for Planting. — There are three ways of plant- ing for three different purposes. If we plan to cut the crop for green forage, to feed in summer when pastures become dry and short, we should drill the corn in rows so the stalks will stand three or four inches apart all along the rows. This plan will produce an im- mense tonnage of green feed for summer use, but the yield of ears will be light. (See Chap. X.) A southern white variety would be good for this purpose. If we want the crop to cut in September for whiter fodder or ensilage it is well to have the stalks about a foot apart hi the FIG. 77.— Corn planted at different depths to show time s £f;0(nArcultu CORN 145 rows. This will result in the greatest total yield of nutrients in the stalks and ears. A good variety for this purpose would be one which would ripen in the region where planted. The third plan is to have the stalks stand three in a hill and hills three feet apart in the row, with rows four feet apart or a little less. This is the plan followed in the great corn region of the middle West. Usually the hills are in rows both ways for greater ease of cultivation. The so-called hill plan or check-row plan gives the greatest yields of ear corn. These are not real hills, as corn should not be hilled up. There are good local varieties in different sections. These usually prove better for the locality than any other from a distance. Planting Dates. — It is not entirely safe to go by the calendar in deciding when to plant corn. If the soil is pre- pared early and thoroughly so that the warm air can enter it, the time of planting may be hastened. The crop should not be planted until after the last killing frost is past. The Year Book of the United States Department of Agri- culture gives the following dates for three regions : Gulf States, March 15 to May 10, and April 5 most general. Central States, Virginia to Kansas, April 15 to May 25, and May 1 most general. Northern States, New York to Minnesota, May 10 to June 1, and May 20 most general. Tillage. — As soon as the seed is planted we can use the smoothing harrow and continue to use it after each heavy rain as soon as the soil loses its sticky character. Have no fear of injuring the little corn plants except in the early morn- ing when the plants are too full of moisture, or in very stony fields. If this system of harrowing the corn after it is up is followed, there will be very few weeds to be seen hi the field. It is much faster work to harrow the field, taking several rows at a time, than it is to use the cultivator, one row at a time. When the corn is high enough so the cross-bars of the harrow tend to break off the plants, use a weeder or a fine- toothed cultivator a number of times to keep a fine soil- 146 PRODUCTIVE FARMING mulch on the field. If the weather conditions should be such as to keep the cultivator out of the field too long at a time, the ground will form a crust. Then it will be necessary to make the cultivator teeth go deep enough to break up and pulverize the crust. But when no crust is formed always keep the shovels or teeth quite shal- low (Fig. 78). Harvesting Seed Corn. — It pays the farmer well to select his own seed corn. This is best clone in the fall, just before frost and before harvesting the main crop. Such ears are selected as have the characters described in the rules given, pages 133-137. Pick out the ones that are most mature; they will be hanging downward. Take them from stalks which bear two or more good ears. Storing Seed Corn. — As soon as the ears are selected and gathered the husks should be entirely removed from them. Store the ears where the moisture will dry out well before winter, and where mice will not attack them. A good way is to tie the ears with cord in such a way that they will not touch each other and suspend each lot from a hook in the ceiling where mice will not bother the corn. Corn may be stored on sheets of finely woven wire netting which is tacked to the bare rafters or joists of a dry room, as a shop or attic. If there are vertical posts in the room, headless nails may be driven part way into the posts; and then the large ends of the ears are slipped over the nails (Fig. 79). Harvesting the Main Crop. — To secure the best return from the corn crop the harvesting should include not only the ears but also the stalks. This should be done as soon as FIG. 78. — Corn plants half grown, showing the root system. Many small fibrous feeding roots are only a few inches under ground between the rows of corn. Deep cultivation is likely to destroy many of them. CORN 147 the ears are nearly ripe, after the kernels are hard. With most all field corn grown in the northern states the growth continues until about the time of the first fall frosts. There are several plans in use in various sections for the harvesting of the corn crop. 1. The farmer can more nearly secure the entire value of the corn crop by cutting the whole stalks just at the proper time and putting it in the silo. The stalks and ears are run through a cutting machine (Fig. 80), and the finely cut forage is blown or taken by a carrier into a silo. This is called ensilage. For the making of good ensilage the corn crop should be well matured, the kernels glazed and well-dented, and the husks partially dried. 2. In all dairy sections the stalks are usually saved and fed after the ears are removed. This is called stover. First the whole crop is cut, by hand or by machines, and put into shocks. This should be done before the leaves become brown and the stalks dry. The shocks are tied very tightly near the top to avoid weath- ering. Later the ears are husked from the shock, and the stover is tied in large bundles and stored under shelter. The husked ears are first put in piles on the ground and then hauled to the crib. 3. Husking and shredding machines are often used in some sections. The corn fodder from the shocks, after it is well cured, is run through a machine which husks and snaps off the ears and shreds the stalks. This is one of the best ways to use the whole crop after it is cured. FIG. 79. — Corn-drying rack. 148 PRODUCTIVE FARMING 4. Stripping the blades of corn before the ears are har- vested is quite common in some parts of the South. The labor is too great to compensate for the crop of forage thus secured. 5. Topping is a name given to the practice, in some localities, of cutting the stalks just above the ears. This is as much labor as to cut and shock the whole crop. FIG. 80. — Silo filling. This silo is made from wooden staves and steel hoops, a structure common in the Eastern States. The ears and stalks are cut fine and carried up into the silo by the endless chain. 6. In some sections the ears are husked from the stand- ing stalks late in fall or in winter. This is done by driving through the field with a wagon having a large box, into which the ears of corn are thrown by the men doing the husking. The stalks are wasted, but cattle are sometimes allowed to "pick over" the field and eat the ears that were skipped. A considerable amount of fodder is also eaten by the stock. CORN 149 7. In some southern sections where the attacks of the grain weevils are bad, it has become the practice to jerk the ears and store them unhusked. The work required to jerk the corn and afterwards husk it is greater than husking from the standing stalks. But most of the jerked corn is fed to stock without husking. Ensilage Most Economical. — The entire feeding vafae of the corn crop is best saved in silos. The ears, stalks, and leaves, cut up very fine at harvest time, are saved for the feeding of stock in winter or in the dry season of the summer. The product is called silage or ensilage. (See chapter on feeds and feeding.) Silos are often made of staves with steel or wooden hoops. Some are made by standing up studding in the form of a circle and then nailing two layers of half-inch lumber bent around inside, with tar-paper between the layers. Masonry silos may be made of (1) concrete reinforced with steel rods; (2) brick with reinforcing bands; (3) stone; (4) hollow tile blocks with reinforcing rods or wires. Metal silos are found in some sections. In dry climates silos are entirely below ground, and in other regions they are often placed about six feet in the ground and the masonry wall extends one or two feet above the surface for protection of the wooden superstructure. Silos should be round in form to prevent the silage from spoiling in the corners. The silage is thoroughly tramped, particularly at the edges, at filling time to make it to settle well. Roofs may or may not be used as desired in cold climates having much snowfall. Rainfall is usually considered bene- ficial, and water is often run into the silo at filling time if the crop is rather mature. The capacity of silos increases more with the depth than with the area of the surface. This is because the silage is packed so closely in very deep silos. The following table, 150 PRODUCTIVE FARMING adapted from King, shows the number of tons of mature silage in round silos of different diameters and depths : Approximate Capacity of Silos. Depth of silo, feet Inside diameter of silo, feet 10 12 14 15 16 18 20 25 36 52 70 81 90 116 143 26 38 55 74 85 97 123 152 27 40 58 78 90 103 130 160 28 42 61 83 95 108 137 169 29 45 64 88 100 114 144 178 30 47 68 93 105 119 151 187 31 49 70 96 110 125 158 195 32 51 73 101 115 131 166 205 36 64 105 130 139 155 190 235 40 75 121 150 165 180 228 279 Storing the Ears. — Corn should be stored in a crib with slatted sides to allow the air to circulate freely. The roof should be broad, and rain proof, to keep the corn entirely free from external moisture. Corn should be kept on the cob, at least until it is thoroughly dry, to prevent heating and molding. It is best to protect the crib of corn from mice, rats, and sparrows. For this purpose the floor and sides of the crib are sometimes covered with galvanized wire netting of about one-fourth-inch mesh. Storing the Stover. — Corn stalks intended for feed should not be exposed for a long time to the weather. Corn thus exposed loses much of its feeding value. It is much better to put it under shelter in barns or in sheds. The corn stalks should be thoroughly dried before storing for winter. If the fall weather be very damp, much care must be exercised to prevent the stover from heating in the sheds. When corn stover has been shredded, it is sometimes stored in layers alternating with dry straw. CORN CLUBS Much interest has been aroused in the improvement of varieties of corn, and in the increased production per acre, through the boys' corn clubs. New Standard for Corn. — In sections of the United CORN 151 States where the average yield has been comparatively small for many years, the boys have set an entirely new high stand- ard in corn yields per acre. For instance, in Alabama, one boy grew 232.7 bushels per acre in 1913, whereas the average yield for corn in the United States is 30 bushels per acre. These noticeable and startling improvements were made by FIG. 81. — A prize-winning field of corn in Virginia and the boy who grew it. He used the correct methods. (O. B. Martin, Plant Industry.) the selection of improved seed, followed by careful and per- sistent tillage. Value of Clubs. — Other boys, encouraged by such re- sults, are led to exert their best efforts to do as well as this Alabama lad did. By belonging to a club the boys are spurred to greater activities because of wholesome competition. This is a good thing. If farmers could feel some of the same thrilling interest in their work — if all farming had some of the spice of competition hi it — there would be fewer . run- down farms, fewer tenant farmers, less farming for a bare living, and more and better crop production, as well as hap- pier, more contented people on the farms of our country. 11 152 PRODUCTIVE FARMING Organization of Clubs. — If it is desired to organize a Corn Club in your school or neighborhood, confer with the County Demonstration, or Farm Bureau Agent. Get him to assist hi perfecting the plans. If there is a district or state club leader, consult him also. Your state agricultural college will be glad to help, or the United States Department of Agriculture will furnish printed matter telling how to pro- F MHimBBHHB ' • I I V , FIG. 82. — The same boy as in Fig. 81 in Ms neighbor's field the same day. Compare the cornfields. (O. B. Martin, Plant Industry.) ceed with the organization. Generally the younger pupils are organized in separate clubs from the older ones. The basis of club work is usually estimated on (1) the greatest yield per acre; (2) greatest profit on investment; (3) best ten ears shown; (4) report and story of work done. Report blanks are furnished free by the United States Department of Agriculture, and every club should obtain them so as to make its work uniform. Keeping Notes. — Every member of the club should keep careful notes of his work, his expenses, and all interesting items in connection with raising his crop. He should be able to give in his report at the end of the season the exact amount of hand labor, horse labor, seed, fertilizer, and everything else expended on his crop, as well as the exact yield and the value of it. CORN 153 If he can select a considerable quantity of extra fine corn from his crop, carefully preserve it through the winter, test it in the spring, and sell it at a fancy price for seed, he will be doing a good stroke of business and may be able to start a bank account or pay his way at an agricultural college. Corn Festival. — In the corn belt or in any section where there is much interest shown in the raising of improved vari- eties of corn, a corn festival makes an interesting get-together event for the neighborhood. At this time the corn club may have its exhibit and listen to the final reports of its members. Prizes to be awarded for the best crops should be given at this time. There should be ribbons for those doing extra well, and honorable mention for others. All should be encouraged as much as possible. Many corn contests are to be arranged for this corn festi- val, such as corn picking in the field, corn husking, corn judg- ing and others. Methods of selecting, curing, and caring for seed corn, also seed testing, should be discussed. The girls, for their share of the entertainment, may furnish corn bread and other dishes made of corn for the picnic dinner. Some pupil should give the history of corn, and some one else should read a paper on the uses of corn — both its direct uses and its by-products. Parents should enter into this heartily with their children, and should not be slow in welcoming new methods nor be afraid to adopt the new ideas. It is not "good business" to hold onto an old farm practice when a better one is at hand and may be used. REVIEW. 1 . Briefly describe the preparation of soil for corn planting. 2. Give directions for the planting of corn for summer green feed. 3. Give distances for planting corn used as winter forage or silage. 4. What is meant by " hill " corn ? What is its chief use ? 5. Name four types of corn grown in America. 6. Describe dent corn. 7. Describe flint corn. . Tell when to select corn for seed. 154 PRODUCTIVE FARMING 9. Describe the best shape of ears of field corn. 10. What things indicate purity of corn ? 11. Give the points which indicate vitality, besides the test. 12. Describe good tips and butts of ears of corn. 13. Why should the kernels be uniform in shape ? 14. Describe the best shape and give the reasons. 15. Why should ears of corn for seed be uniform in length and cir« cumf erence ? 16. Why do we object to deep furrows between rows and open spaces between the tips of the kernels at the cob ? 17. Name five things which aid in determining the proportion of corn to cob. 18. Give two things to be considered when storing seed corn. 19. Give three good ways of storing seed corn. 20. Give a good reason for the individual ear method of testing corn. 21. Describe a seed testing cloth and box for that purpose. 22. How would you keep the ears from being mixed during the testing time ? 23. Tell how to select the kernels that are to be put into the tester. 24. What use may be made of the ears which do not show perfect germination ? 25. Mention several methods of harvesting the main crop of corn. 26. What types of siios are found in your district? 27. What corn club work is carried on in your district? References. — United States Farmers' Bulletins relating to corn: 229, The Production of Good Seed Corn; 537, How to Grow an Acre of Corn; 553 and 554, Pop Corn; 578, Silage; 589, Homemade Silos; 617, School Lessons on Corn; 414 and 729, Corn Culture. -CHAPTER XIV.- SMALL GRAINS. Wheat. — Wheat is probably the oldest grain used by man*.., It is more extensively grown and used than any other human food except perhaps rice. When flour is mad£ from it the by-products are now extensively used to feed animals. In America the newer lands in some portions of the West produce the largest crops of wheat, but the grain is grown somewhat in all sections. Types of Wheat. — As a general rule, the drier regions of the middle West produce hard winter wheat or hard spring wheat, best for flour; the humid climates produce soft wheats. SMALL GRAINS 155 Varieties are also classified by the heads, as bearded and beardless or smooth (Fig. 83) . As to color of grain they may be (1) white or yellowish, and (2) red varieties. Soil. — The heavy clay loams are best for wheat growing but medium loams are also used. Heavy soils are cool and hold their moisture better than lighter soils. The kernels will not develop fully, or "fill," if the soil is too light. Jflflj 83*-— ^hree types of wheat mounted under glass on cotton. Bearded wheat on the right; the others are smooth; square-head wheat on left. Preparation and Planting. — The soil is usually plowed in the early fall, whether it be for winter or for spring wheat. It is important that the bottom soil be well packed down before the grain is sown. For fall seeding the ground may be rolled and then harrowed again to secure the desired con- dition of seed bed. 156 PRODUCTIVE FARMING The time to plant varies considerably in different sec- tions. In Canada and the northern tier of States the spring wheats are usually used and are sown as early in the spring as the soil can be prepared. Winter wheat is more common in the other States and is sown early enough in the fall to Jet the young plants make a good growth before winter. A grain drill is usually used for the sowing of wheat. This gives a better stand than broadcasting or sowing by hand, as the seed is evenly distributed and well covered. The amount of seed per acre varies — according to soil, quality of seed and manner of seeding — from one and a half to three bushels. Heavy seed wheat should always be selected for seeding. The plump, full kernels will give much better results than slender shrunken seed (Fig. 9) . The legal weight in all States is sixty pounds per bushel. That used for seed should weigh this much or more if possible. Harvesting. — Wheat is ripe when the kernels have passed the dough or soft stage. The kernels should be examined before the cutting is made. Cut before there is danger of the grain shattering out of the head. Much progress has been made in the improvement of machines used for harvesting grain. The cutting and binding into bundles is done with a self-binder (Fig. 84) . Then the grain is put into small shocks of about a dozen bundles. Here it remains in the field for a week or two to "cure." It is then ready to thresh or to put in stacks. In the driest regions of the West the grain is headed and threshed immediately. Heading is cutting the stems just below the grain heads with special machines made for that method of harvesting. Oats. — Oats grow farther north than corn or wheat. They like a cool moist climate, and have been grown in the cooler parts of the Old World for centuries. They are now produced in Canada and most of the States of the Union, SMALL GRAINS 157 Oats make one of the best feeds for horses, and when ground are used for other farm stock. Oatmeal in the form of rolled oats forms a good human food. Oat straw is better for stock than the straw of other cereals. Soil. — Oats will grow on soils that are rather too po'or for wheat, but they thrive best on the richer soils. Heavier crops of grain are produced if the soil is heavy. The crop responds well to good applications of fertilizer, if too much nitrogen is not used. Too much nitrogen in the soil produces tall growth and little grain. FIG. 84. — A modern grain harvester. All small grains are cut and bound into bundles by this machine. The tying part of the machine is one of the greatest inventions of modern times. Preparation. — Good plowing and harrowing are advisable before the crop is sown. The lower soil of the seed bed should be well packed down if the plowing is done only a short time before seeding. In some sections the soil is merely stirred with a disc harrow instead of plowing. This custom prevails in the middle West, when oats are sown the next year after corn. A more thorough preparation if the soil is heavy usually gives larger yields. Seeding is done in very early spring throughout the Northern States and Canada. In the South oats are started in the fall. The seeding may be either broadcast or with grain 158 PRODUCTIVE FARMING drills. Two or three bushels of seed are used per acre, according to fertility and method of seeding. Very heavy seed should be selected. Thirty-two pounds is the legal weight of a bushel of oats in all States except Virginia, New Jersey, Idaho, and Maryland. The grain selected for seed should be as heavy as thirty-eight or forty pounds per bushel. Harvesting. — There is a little less danger of the oats shattering from the heads when cut than there is with wheat ; but in general the same condition of maturity should be secured. The grain is cut and bound with self-binders and then placed in shocks, where it is left for several weeks to thoroughly dry out before threshing. Barley. — There are several types or varieties of barley grown in America, which may be grouped as two-row, four- row, and six-row; the numbers referring to the rows of grain on the haads. The two-row barley is more common in Europe and the six-row more common in America. Most all varieties have hulls on the grain, but hulless varieties are sometimes grown. Barley adapts itself to a wide range of climate, as the time required for maturing a crop is very short. It is found wherever any of the other cereals are grown. Soil and Its Preparation. — Barley thrives best on well- drained, rich, sandy loam. The soil is prepared as for oats and the times for seeding in different sections is about the same. Rye. — Rye is less used for bread making than wheat in America, but in some parts of the Old World the reverse is the case. The flour there is cheaper, as it is much darker than wheat flour. Rye grows somewhat taller than wheat and thus produces more straw. The straw has a commercial value for packing purposes. Culture. — Rye will grow in any region adapted to wheat raising, and is grown even farther north than wheat. It does SMALL GRAINS 159 fairly well on poor soils, but the rich loams are better for the crop. When the crop is wanted for grain and for straw the methods of culture are practically the same as for wheat. Rye is often sown in summer to serve as a winter cover crop, and the green growth is plowed under in spring to serve as green manure hi the improvement of soils. FIG. 85. — A good way to tie up small grains and grasses for exhibits. No. 2 had no fertilizer, No. 3 had poorly kept manure, 4 fresh manure, 8 nitrate of soda. Flax. — This crop is grown in the northenTStates and in Canada chiefly for its seed. In the Old World, and somewhat in America, it is also grown for its fibre. The smooth, brown seeds furnish two products: linseed oil is used in painting because it dries so well; after the oil is extracted by pressure the remainder is ground into meal for use in feeding livestock. Linseed meal is rich hi protein and is highly prized for feeding calves. It often forms a part of many stock feeds. Flax has been grown for many centuries for the fibre 160 PRODUCTIVE FARMING which it yields. The best qualities are used in weaving the finest linen fabrics, and the dark, coarse fibres, called tow, are used for heavy cloth bagging and for twine. The leading States in the growth of flax seed are North Dakota, South Dakota, and Minnesota ; but Argentina produces more seed than any other country of the world. About four-fifths of the tiax fibre of the world is grown in Russia. Growing the Crop. — The plant is an annual with pur- ple blossoms. It is not related to the cereal grains. It is sown in the spring, new land being preferred for its growth. Prairie sod land is often selected for growing the crop. It is best to "break" it in the fall and disk it the next spring. Three pecks of seed to the acre will produce a good stand if put in with a grain drill. If a fibre crop is desired two or three times as much seed is planted so the plants will not branch so much and the fibre will not be so coarse. No culture is required and little attention is given the crop until harvest time. Harvesting Flax. — The gram crop is usually harvested by use of a grain binder, and the threshing and cleaning is done with a common threshing machine. Yields vary from eight to fifteen bushels per acre. The fibre crop is usually pulled by hand, as much of the best fibre is in the tap roots and lower part of the stems. The plants are tied in bundles and placed in shocks for a short time before delivery to the fibre works. Growers some- times strip off the heads before selling the stems. The crop grown for fibre is chiefly of a different variety from that grown for seed. It must be entirely free from weeds. To obtain flax fibre from the plants, the bast or inner "bark" must be separated from the inner pith and other parts of the stem. To do this the bundles are spread out for the retting process in the rain and weather for several weeks. SMALL GRAINS 161 Next the breaking process breaks the straw into very short joints and removes some refuse material. The scutch- ing process then follows. This is beating with paddles or combing the fibre through revolving rollers and then through comb-like rods. When thoroughly cleaned and sorted it may be baled or may be spun into thread and woven into cloth. Flax for fibre is a paying crop to grow where hand labor is cheap; but it is because of the scarcity of such labor that flax is so little grown in America. EXERCISE. — Samples of Grains. — Let pupils bring from their homes or from their stores small samples of wheat, rye, oats and barley. There may be poor and good samples in the collection. These may be placed in bottles with suitable labels. Extra fine samples may be secured by the teacher for a school collection at local fairs or other expositions. EXERCISE. — Heads of Grains. — Make a collection for the school of all the forms of heads of the different kinds of grain that are grown near by. Preserve these in a bed of cotton in shallow pasteboard boxes with glass over them, seemed by binding strips (Fig. 83). A method of preparing samples for school fairs is shown in figure 85. REVIEW. 1. Tell what you can of the different types of wheat. 2. Tell of the preparation of the soil and times for drilling in wheat. 3. What is the legal weight of wheat? Why should seed wheat be heavier, if possible? 4. Describe the appearance of good seed wheat. 5. What is a self-binder? What is a header? What is a thresher? 6. WTiat are the chief uses for oats? 7. Give directions for the seeding of oats. 8. Name three types of barley. Which is most grown in America? 9. Where may rye be grown? 10. How does rye flour differ from wheat flour? 11. What soils are suited to the growing of rye? 12. Describe the use of rye as a green manure. References.— U. S. Farmers' Bulletins: 424. Oats: Growing th? Crop: 443, Barley; Also Nos. 466, 518, 596, 640, 678, 680, 704, 732, 738; 756, Rye; 793, Millet; 785, Flax; 786, Fall Grains. 162 PRODUCTIVE FARMING CHAPTER XV. POTATOES. IRISH POTATOES. THE origin of the Irish potato has been traced to South America. From thence it was brought to North America, and from here was taken to Europe by the early explorers. It was called Irish potato because it was so extensively grown in Ireland after its introduction into Europe. Importance. — It is now one of the most important crops of the world and is so universally grown that no one section can claim to raise the majority of the world's crop. The United States in reality produces a small portion of the world's crop. Not only is the Irish potato used very extensively as human food; it is also fed to animals, used for the manufac- ture of starch, and also largely for the making of alcohol. Every State in the Union raises potatoes to some extent. Those States which produce the bulk of the crop grown in this country are, in the order of the amount grown, New York, Michigan, Wisconsin, Maine, Pennsylvania, Minne- sota, Ohio, Iowa, Illinois, California, Colorado, New Jersey, Washington, Indiana, Nebraska. In 1913 the United States produced 331,526,000 bushels of potatoes, valued at $227,903,000. Greatest Production. — It will be noticed that the States named in the paragraph above are all northern States. The reason that the leading potato-producing States are all in the northern part of this country is that the Irish potato thrives better in the cooler soils and climates. Southern Potatoes. — While the South produces many thousands of bushels of potatoes annually, they are mostly the early crop, planted even as early as December in Florida, and of course harvested correspondingly early. These south- ern potatoes supply the early markets, both North and South. They will not keep long. Thus the South must POTATOES 163 depend for its winter supply on its late potato crop, or on those grown in the North. The combined yields per acre of the two plantings in the South will hardly equal the one crop grown each season in northern States. Northern Potatoes. — The North raises but one crop, and this is planted in the spring after all severe frost is over. It then requires the whole season to mature and is harvested before the ground freezes in the fall. These potatoes, which have grown through the long season and are well matured, are of good keeping quality. They do not sprout so readily as the more rapidly matured potatoes of the South. It is for this reason that the southern States get most of their seed potatoes from the North. Types. — There are chiefly two types, viz., early pota- toes and late potatoes. These differ chiefly in the time required to mature the crop from the time of planting. Early varieties are planted as soon as the ground can be worked in spring and are harvested as soon as possible for early market. Late varieties are planted late in May or early in June and are left in the ground to full maturity and are then sold or stored for winter. Soil. — The best soil for the potato is a rich, sandy loam, well drained and well supplied with vegetable matter. A soil heavier than this may be used if it is improved by green manuring and drainage. The lighter. soils should be greatly enriched by the addition of green manures and fertilizers. Potatoes should be alternated or rotated with other crops on the field, not continuously grown on the same land. Barnyard manure for potato fields should be well rotted or may be applied to the soil for the preceding crop, such as corn. Commercial fertilizers are commonly applied at the time the potatoes are planted. Need of Moisture. — Irish potatoes require a large sup- ply of capillary moisture. For every pound of potatoes harvested the plant will have used nearly five hundred pounds 164 PRODUCTIVE FARMING of water taken from the soil during the growing season. The grower therefore finds it necessary to conserve the soil moisture by thorough tillage at the proper times, and by the mainten- ance of dust mulch or straw mulch. The soil should be deep, black, and full of vegetable matter to aid in holding moisture. Green Manure. — A green manure to plow under in the early spring may be started in the field of corn or other crop the preceding summer. Sow the seed in July or early August, using a mixture of rye, winter vetch and crimson clover. These plants will serve as a winter cover crop and when plowed under will quickly decay and form humus. Fertilizers for Potatoes. — In States east of the Missis- sippi Valley it is usually found advisable to fertilize the soil for potatoes when grown for market. Barnyard manure is usually applied to the field a year before the potatoes are to be grown there. Green manure or grass sod may be turned under the spring that the potatoes are to be planted; but it should be worked well by disking after the plowing. Fresh manure from horse stables applied the same year that the crop is planted tends to cause the scab disease to develop badly. Commercial fertilizers for potatoes are usually applied at planting time and are drilled in the rows after part of the soil has been drawn over the seed potatoes. The fertilizer should not actually touch them. A fertilizer that is rich in potash is desirable for potatoes. A complete mixture may contain these percentages : 2 to 3 of nitrogen, 4 to 6 of phos- phate, 8 to 10 of potash. See Appendix Table VII for in- gredients to use for these mixtures. Plowing should be done in the spring not long before the potatoes are to be planted. It must be deep and thorough as the potatoes require a loose bed for growth. The newly plowed ground must not be packed with a roller, but should be smoothed with a common harrow. Cutting Seed. — The seed pieces are cut in many different ways, with one or two eyes to a piece being the most common. POTATOES 165 Experiments have shown that cutting the tubers into quarters will give larger crop yields (Fig. 86). Saving Seed Potatoes. — When seed potatoes are very expensive, as is often the case at planting time, there is a strong temptation to cut the pieces very small with only one or two "eyes " or buds on each piece. As the buds are abundant and strong at one end, and scarce and weak at the other, it is often best to cut off the . .,_.. ._ eye end for planting and | use the remainder for . cooking (Fig. 86a). BU Much is saved and a better stand is secured in the field. Large tu- bers may be cut into pieces, of about two ounces each. Varieties. — Irish pota- toes vary in color of skin and flesh, texture of flesh, depth of eyes, smoothness of skin, shape, size, earliness, keeping qualities, cooking qualities, and in other ways. As to time required to mature the crop, growers com- monly classify the varieties as early, medium, and late. The early varieties are most desirable for summer market and are not so good for storing as the others. They are sold as soon as harvested so as to obtain the best prices. Good early varieties are Early Rose, Peachblow, Early Ohio, Red Triumph, White Triumph, and Irish Cobbler. Later varieties yield more than the early ones and are usually left in the ground until thoroughly matured. They will, therefore, keep better in storage. Green Mountain and American Giant are heavy yielding varieties of the medium season. FIG. 86. — Seed potatoes may be sprouted in bright sunlight before planting. Vigorous green sprouts will thus be developed. These will greatly strengthen the growth after planting. 166 PRODUCTIVE FARMING Carman No. 3 and Rural New Yorker are late varieties that resist disease fairly well. Other late varieties that are popular because of good quality and heavy yielding are Burbank and Sir Walter Raleigh. FIG. 86a. — The eye end of the potato is best for seed. The stem end may be saved for food if desired. Never cut across the eye end as shown at the left. Seed Selection. — For the best crop it is well to select seed potatoes of the form and character desired in the crop. The following score card will serve as a guide in selecting potatoes either for seed or for exhibition: Size 20 Too large, cut 2 Too small, cut 12 Not even, cut 6 Appearance 60 Not bright, cut 10 Dirty, cut 10 Scabby or wormy, cut 40 Shape 10 Quality 10 Unsound, cut 5 Brittle or spongy, cut 5 Total .' 100 It is not wise to plant small potatoes because they are cheap. It is well, if possible, to select seed from heavy- yielding plants, as this is certain to help increase the yield. Seed potatoes from northern States are shipped to growers in the middle and southern latitudes for the sake of increasing the yield and hastening the growth of the crop. This prac- tice of "importing" seed from farther north is not always necessary for the middle latitudes, but should be continued in the South where the tubers do not ripen well. POTATOES 167 Planting. — Early potatoes may be planted as early in the spring as the soil can be prepared. Late potatoes should be planted in May or early June. The crop suffers when dry weather comes on. The time of planting should be planned to bring the time when the tubers are forming at a period when the rainfall is usually good. There are several good methods of planting potatoes; these vary according to climate and soil. In wet or heavy soil they may be planted only three inches deep; in the lighter soils or when the weather is hot and dry the tubers may be planted as deep as six inches. In large fields, potatoes are usually planted by the use of machine planters. There are several types of these machines. The best ones open the furrow in the plowed field, drop the seed potatoes at regular intervals, cover them with soil, and distribute commercial fertilizer as desired. Two crops a year are usually grown in States south of the Ohio River. It is best to not grow the second crop on the same field where the first was dug. Rotation is better. The first crop is planted in February or March or as early as the ground can be prepared. This crop usually suffers very little from dry weather and is more productive than the late crop. The harvest is in May, June or July, depending upon the latitude. The second, or late crop is planted about June or July, and if protected from blight disease may continue growing until winter, say about the first of December. Frost does not injure the crop. For the second crop, seed potatoes chiefly from the northern States are held over in cold storage for the midsummer planting. Mulching the second crop with straw or similar material is practiced hi many places. This is to save the soil moist- ure and to give the growing tubers a cooler condition. The crop is planted in the usual way, or perhaps a little shallower. Then the straw is spread over the field a few inches deep. If the 12 168 PRODUCTIVE FARMING ground is mellow no tillage is given, at least until the vines are half grown. In some cases no tillage whatever is required. Early varieties should be planted for the second crop of potatoes. Lookout Mountauij Green Mountain, Irish Cob- bler, Early White Triumph, and Red Triumph are popular for both plantings in the South. Distances for Planting Potatoes vary somewhat in dif- FIG. 87. — Digging potatoes by use of a machine and four horses. Men, women and children sometimes pick up the potatoes after the machine. ferent potato districts. Very commonly the rows are three feet apart and the seed-pieces are twelve or eighteen inches apart in the rows. Ten bushels of seed potatoes are required to plant an acre, at distances one and a half by three feet, if the pieces weigh one ounce each. Cultivation. — After the planting is done the field should be harrowed. After this frequent shallow cultivations are made until the vines are so large that they shade the soil well. A light ridging of the soil towards the rows at the time of the last cultivation is usually practiced, the purpose being to prevent the new tubers from growing out of the ground. Insect Pests and Diseases.— Farmers have lost many acres of Irish potatoes through the ravages of insects or plant diseases which they did not know how to combat. But through the experiments made at the State experiment stations, farmers are now able to control both insects and plant diseases. POTATOES 169 Potato beetles and flea beetles are kept in check by spraying or dusting the plants with poisons. For example, one part of Paris green is mixed with 20 to 40 parts of pow- dered lime, air-slaked. It is put into a burlap sack and shaken over the potato plants in early morning while the dew is on them. This work should be started in early spring when the adult potato beetles are coming out of their winter hiding places to lay their eggs on the potato leaves. Killing old ones early will prevent much damage by young ones a little later. See the insect chapter for the life history of potato beetles. Spraying potato fields is a little more expensive than the dusting method, but is usually the more desirable for several reasons: (1) the poisoning can be done more thor- oughly; (2) the poison when applied wet will stay on the plants longer and may not need repeating so often; (3) the spraying work may proceed in fields all day, while dusting can be done only while the dew remains hi early morning; (4) when spraying for beetles the farmer may also add Bor- deaux mixture, and thus prevent the blight disease, at the same time. The spray solution for beetles alone should contain arsenate of lead or Paris green. If the latter is used a little lime is added to make the spray cling well and to prevent damage to the leaves by free arsenic. Use one-fourth to one pound of Paris green and one pound lime to 40 or 50 gallons of water (or Bordeaux). Keep well stirred while spraying. For spraying with arsenate of lead, mix two to three pounds of the arsenate in paste form with 40 or 50 gallons of water or Bordeaux (see Appendix, Table III). Potato blight is often as serious an enemy of the main crop as the beetles. In one sense it is more serious because of the fact that when it makes a start in a field nothing can stop it and the whole crop is likely to become affected. Preven- tion spraying is the only practical remedy. Bordeaux mix- ture is used for this. Apply it as early as you would begin to 170 PRODUCTIVE FARMING fight the beetles. Plan to fight them both at each spraying, by combining the poison with the Bordeaux. See preceding paragraphs. Two kinds of potato blight affect the crop, namely early blight and late blight. They both turn the vines brown and gradually kill them. They are both effectually prevented by using Bordeaux in advance of the disease, say every time that poison is needed to kill potato beetles or flea beetles. The early blight is much less destructive in most States than the late blight. Growers do not always find it practical to spray to prevent early blight. But as Bordeaux mixture is not expensive and if the work of spraying for beetles is done earty, it is advisable to use both the poison and the Bordeaux together. Late blight is usually very common. Most unsprayed crops are affected by it. The vines die too soon; the yield is much reduced; the tubers ripen prematurely; and the pota- toes will not keep in storage so well. The so-called " centre rot" and "end rot" of the tubers at harvest time and later, are results of the attacks of late blight. It was this potato blight which caused the terrible famine in Ireland hi 1846. There is no excuse for not preventing this disease by spraying with Bordeaux mixture while spraying with poison to fight the beetles. (See Appendix, Table III, for making Bordeaux mixture.) Potato Scab Disease. — This is a serious trouble in nearly all potato-growing districts. If all seed potatoes are given a preventive treatment before planting, the soil will be kept free from the disease and the crop will not be affected. Before cutting the tubers, soak them for two hours in a solution of one pint full strength formalin in thirty-two gallons of water. Applications of fresh lime or fresh manure both tend to increase the scab disease in the soil. These should both be avoided when potatoes are planted. Harvesting. — Large potato fields are usually dug by use POTATOES 171 of machines drawn by horses (Fig. 87). One of the smaller forms is shown in Fig. 87a. Larger machines elevate the tubers, shake off the dirt, and drop them on the ground. They are drawn by three or four horses. Small garden patches are dug by hand tools. Weights and Yields. — The legal weight of' a bushel of potatoes is sixty pounds, except in Pennsylvania and Vir- ginia, where the weight is fifty-six pounds. The yields are often two hundred and fifty bushels or more per acre, but Fio. 87o. — An inexpensive potato digger to be drawn by one or two horses. (Plant Industry.) the average is about one hundred bushels per acre. The value of the crop in the United States each year is about $100,000,000. SWEET POTATOES. The sweet potato is grown to a limited extent in nearly all the northern States, but the best qualities and largest quantities are produced in the southern States. The plant is of tropical origin. . Soil. — Sweet potatoes thrive best on a rather sandy loam which does not contain too much of organic matter. Soils that are too poor for the production of most other farm crops may suit sweet potatoes very well. Starting the Plants. — New plants are started in early 172 PRODUCTIVE FARMING spring from seed potatoes. The whole potatoes are planted in fine, rich sandy loam in hot-beds (Figs. 88, 89). These may be heated either by manure or by fuel. The tempera- ture at first is kept at 80° or 85° F. Before the plants are pulled from this bed to be transplanted to the field the temperature is gradually lowered to 60° F. The growth in the hot-bed requires about six weeks. . FIG. 88. — Sweet potatoes in a hot-bed ready to be covered. They will produce young plants for field planting. (Experiment Station, N. J.) In the Field. — The soil is prepared as for corn — the sur- face being left smooth and even. In some pfaces the farmers ridge the field and set the plants on the ridges. Others practice the level culture. Planting in the field should be done when the soil is moist enough to produce a rapid growth after setting the young plants. Where level culture is prac- ticed the plants are often set two or two and one-half feet each way. Where ridges are made the rows are often three and one-half feet apart and the plants fourteen to eighteen POTATOES 173 inches apart in the rows, requiring over 8000 plants per acre. The plants are set in the ground by hand, by tongs, or by large machine planters. Cultivation is simple and does not last long as the vines soon cover the ground. Large weeds are usually pulled by hand or cut with hoes. Harvesting is done before cold weather. The vines must be cut loose from the hills before they are frozen to prevent injury of the crop. There are special plows, similar to Fig. 87, for digging sweet potatoes. Small areas are often dug with spading forks. FIG. 89. — A single sweet potato from the hot-bed, showing many young sprouts. Note the difference in the size of young plants. (Experiment Station, N. J.) Storage is necessary if the crop is not sold immediately. Special pits and heated buildings are constructed for storing sweet potatoes. The roots must be handled with the greatest care to avoid bruising them if they are to be stored. When first put into storage they go through a "sweating" or curing process; this requires a temperature of 85° or 90° F. After that the temperature is kept at 55° to 65° F. A great deal of ventilation is required to keep the place perfectly dry. 174 PRODUCTIVE FARMING EXERCISE. — Yield and Value. — Find out the usual yield per acre of Irish potatoes in your vicinity, and then estimate how many acres of land it would take to raise the number of bushels produced in the United States in 1913. Would this acreage entirely cover any of the smaller States? What was the value of the yield per bushel that year? What per acre? REVIEW. 1. Where was the Irish potato first found? 2. How did it come to be called the Irish potato? 3. Learn if you can who is said to have carried it from North America to Europe. 4. What States grow the heaviest crops of potatoes? 5. Compare potato growing in different sections of the United States, as to planting dates, keeping qualities, and in other ways. 6. What kinds of soil are best suited to potato growing? 7. Why do potatoes need so much moisture? 8. Name some of the best varieties for seed. 9. Find out what kinds are grown in your vicinity. Learn which yield the heaviest crops. 10. Tell of the times for planting early and late potatoes. 11. Give depth for planting; also distances. 12. Give directions for treating seed potatoes to keep the scab disease out of the soil. 13. What is the legal weight per bushel of potatoes in your State? 14. What fertilizers do farmers use for potatoes in your locality? 15. What green manures help the potato crop? 16. Give directions for plowing potatoes. 17. Give directions for selecting and preparing seed potatoes for planting. 18. Where and how are two crops grown in one year? 19. How should a field of potatoes be cared for after planting? 20. What insects attack the potato fields? 21. Have any plant diseases ever destroyed potatoes in your neighborhood ? 22. How may insects and diseases be controlled at the same time? 23. In what climates and on what soils are sweet potatoes usually grown? 24. Describe the starting of sweet potato plants for a large field. 25. Tell how sweet potatoes are stored for winter. References.— IT. S. Farmers' Bulletins : 324 Sweet Potatoes; 365, Farm Management in Northern Potato-growing Sections; 533, Seed Potatoes; 544, Potato Tuber Diseases; ,548, Storing and Marketing Sweet Potatoes; 714, Sweet Potato Diseases; 753, Commercial Hand- ling, Grading and Marketing of Potatoes. TOBACCO FOR MARKET CHAPTER XVI. TOBACCO FOR MARKET. TOBACCO crops were grown in Virginia by white men, as early as 1612. Before that time Indians had been growing it for their own use. The United States now produces over a billion pounds annually, which is fully a third of the world's production. When sold as low as ten cents a pound the money value is enormous. The crop is grown commercially hi all the humid parts of the country, particularly in the Eastern States. The lead- ing States in order of production are Kentucky, North Caro- lina, Virginia, Ohio, Tennessee, Wisconsin, Pennsylvania, South Carolina, and Connecticut. Tobacco is of several types or classes which are much influenced by local soil and climatic conditions. Each sec- tion is usually devoted to the growing of one type, as cigar wrapper or binder, cigar filler, pipe tobacco, and plug tobacco. Manufacturing types include all but cigar types and export types. The plant is an annual which grows very large and rank, with an erect, simple stem. The large, simple leaves from this stem are of commercial value. They have a biting or pungent flavor and aroma and contain from one-half to two and one-half per cent of nicotine in mild tobacco, and as much as eight per cent in the lower grades. The seeds of the plant are abundant and very small. Only a few plants are allowed to form seed with which to start the next crop. The soil should be deep, rich, and well drained, but sandy enough to be easily warmed and ventilated. The plant is very exhaustive to the nitrogen, phosphate, and potash, and these plant foods should be supplied by the use of ma- nures and fertilizers. The plowing should be nearly a foot deep, and the surface is then disked and harrowed until well pulverized. 176 PRODUCTIVE FARMING Seeding is in cold-frames in the South and in hot beds in the North. The soil for the bed is often made sterile by burning some brush over it just before the time of planting. Seeds are sown after the soil is in fine condition. For a bed 10 by 50 feet use about one ounce of seed, or one tablespoon- ful. This may furnish plants enough for about five acres, when transplanted. Cover the seeds lightly by tramping, rolling or raking. Cloth may be used to cover the beds, but glass is used in the cold regions. About six weeks should be allowed for the growth in beds. Transplanting is not done until all danger of frost is over and the field soil is warm and mellow. The rows are placed three to four feet apart and the plants a little closer in the rows; or they may be in rows both ways for ease of tillage. The transplanting may be either by hand or by machine as with early cabbage plants (Fig. 89a). Care. — The crop is given very clean weUI(ir?und~theeanewiy '"St culture duruig its growth. The large plant. (Dunham Co.) horn-worms, if abundant, must be killed by spray ing with a poison, arsenate of lead or Paris green; but if not abundant they are picked off by hand. When the plants are large the suckers are removed, and the tops are cut to prevent flowering and seeding. Priming is the re- moval of the lower leaves which are apt to be injured by the soil. Harvesting begins when the leaves are ripe enough to cure. The skilful grower determines this by the color and the "feel" when folded in the fingers. Usually the whole plant is cut near the ground and the stem split to slip on a lath, after wilting. The laths, each with several plants hanging from it, are hauled to the barns or sheds and hung in open tiers for curing. In some sections and with some types of TOBACCO FOR MARKET 177 tobacco, the leaves are gathered separately as they ripen. Curing is of three main types: (1) air curing in well- ventilated buildings; (2) open fire curing in closer barns with fires on the floor after the' plants have yellowed a few days ; (3) flue curing in tight barns with furnaces and flues. The last method requires most skill but least time, and smaller buildings may be used. Stripping and sorting is done after curing at a time when the leaves are moist enough to be handled without loss. Grades depend upon length of leaf, injury, texture, color, and curing. It can then be tied into hanks and. bulked. It is now ready to be stored for future marketing. Varieties for dark tobacco are Yellow Mammoth, Pryors, and Orinocos, with their many derivatives. These are usually fire-cured. White Burley is the leading air-cured variety. REVIEW. j/ 1. Compare tobacco as a money crop with some other crops of the United States. 2. Mention the different classes of tobacco. 3. Describe the starting of the crop. 4. Tell what you can of the field care. 5. What are the two methods of harvesting? 6. Outline three methods of curing. References to Bulletins on Tobacco. — United States Farmers' Bulletins: 72, 120, 416, 523, 571, and 595. Kentucky Station bulletins 129 and 139. 178 PRODUCTIVE FARMING CHAPTER XVII. THE PRINCIPLES OF FORESTRY. FOREST products in America are not as generally con- sidered a part of the permanent resources of the farm as they should be. The chief products are lumber, posts, poles, railroad ties, and fuel. Thus far lumber, ties, and poles have been obtained mainly from native forests. These are rapidly becoming exhausted. In the prairie States firewood and posts are obtained from plantings made by man (Fig. 896), but elsewhere chiefly from the native woods. FIG. 89&. — Tree seeds of many kinds may be planted in fields and gardens. The seedlings are cultivated for one year and then transplanted to wood-lots and shelter-belts (U. S. D. A.) Forestry should become a systematic part of many farms in all the prairie States as well as in the States where tim- ber was originally found. Tree planting is naturally considered under two heads: (1) Prairie planting may be for ornament, windbreaks, shelter-belts, and wood-lots or groves for wood, posts and THE PRINCIPLES OF FORESTRY 179 lumber. (2) Forest planting, which is primarily for the revenue to be derived from the sale of wood and lumber. It is a special problem in the management of each indi- vidual farm to decide just what planting should be done. The Forestry Service of the United States Department of Agriculture offers to give practical assistance to tree planters in deciding these questions. Circular 22 of that service should be read in this connection. Careful study should be given to the planting of trees under some good system, as a forest is the most permanent thing that can be planted on a farm. Need of Forest Planting. — Forests are necessary to the highest material development of any country. The climatic influences are very beneficial. It is desirable in behalf of the public welfare to plant trees in great number. This is true both on the treeless plains and also on the sites of de- stroyed forests. To be of most public benefit the planting should be well distributed over the region. All will share the benefits and all should join in planting the trees. Forest Influences. — Growing trees conserve moisture, modify climatic extremes, and purify the air. Careful observation shows that large trees growing in a grove affect climatic and soil conditions in several ways: 1. During the day the ground under the trees is protected from the sun's rays and is therefore cooler than soil not protected. The air circulating over this cool soil tends to cool the air in the immediate vicinity on sunny days. 2. At night the trees retard the loss of heat from the ground under them. This tends to equalize the temperature of not only the soil and air under the tree but that in the near vicinity. The soil and air are kept cooler by day and warmer by night. This equalizing of temperature is notice- able during short periods of very hot or very cold weather. Gardens growing near trees are sometimes uninjured by fall frosts which kill tender plants in other gardens. 180 PRODUCTIVE FARMING 3. The drying out of soil is also prevented by the mulcb of leaves and twigs which fall to the ground under the trees. Trees and leaves check the flow of water over the land, thus preventing the washing away of good soil. The soil is not so badly beaten down by heavy rains. The water soaks into the soil better and the flow-off is very gradual. 4. By breaking the force of the wind trees will aid in retaining moisture in the surface soil near the trees. The evaporation decreases as the wind is checked. Water is also held better in the soil shaded by the trees. A large amount of water which the trees give off from their leaves is drawn from the subsoil, without drawing on the water of the surface soil. This moisture from the leaves increases the amount in the surrounding air. Trees which have the roots near the surface, as the elm and red maple, take up so much water near the surface as to make it unwise to try to grow crops near them. 5. The destructive force of severe winds is often prevented by trees. Tornadoes may be prevented or made of little effect by large groups of trees. Certain crops may be grown when protected by shelter-belts of trees that could not other- wise be grown on the prairie. These shelters from high winds prevent the blowing of soils. They lessen the severity of cold winter winds both for stock and for people. How Trees Influence Water Supply. — The proper dis- tribution of water upon the land is the most important factor in the growing of crops. In the natural course of the seasons we have both floods and droughts. The proper holding of the water from flood-time to drought is best accomplished by the growth of trees and the protection of natural forests, Eain falling upon forested areas flows away slowly. Springs and streams are kept constantly supplied from the water of such areas. Instead of the waters of the rainy season producing heavy floods and causing much destruction along the courses of THE PRINCIPLES OF FORESTRY 181 streams the water is greatly retarded and no flood is expe- rienced. The water from heavy rains is held back by the carpet of leaves on the soil beneath the trees, by the roots in the soil, and by the decaying matter from former years. In sections where the forests have been cut off for the use of man, the streams frequently go dry during the summer. Water power of mills and factories is thus cut off; the water supply for homes, villages, and cities is reduced to the danger point. Navigation of the larger streams is checked or stopped for a while. Many wells are without drinking water because the level of the soil water is deeper than the wells. The growth of forests would correct the difficulty of water supply in many parts of the country. The United States Government has reserved large areas of mountainous and hilly land for the purpose of preserving the natural forests and maintaining the flow of the larger streams in those sections. Forest Planting on the Farm. — The wood-lot or forest plantation on a farm where the land is all tillable should usually be in the form of a wide shelter-belt. If there be rough land on the farm not suitable for the more common crops, groves may be maintained on this to good advantage. On land too stony or too steep for use of other crops some kinds of trees will grow well. The location of such groves is to be determined by natural conditions. The location of the wide shelter-belts will be influenced by several things. These trees may affect the air drainage of near-by orchards; the wind currents will be controlled; and the humidity of the air about the home will be influenced. Such trees should be far enough from the buildings and roadways to not cause the drifting of snows which would be in the way. The shelter-belt should be about six rods wide, made up of a number of lines or rows of trees with the smaller kinds on the side toward the prevailing wind. This will deflect the wind currents upward and prevent their bad effects. J 182 PRODUCTIVE FARMING Make the belts of trees several rods wide, because single rows of trees or narrow belts are less profitable when we consider the relative amount of land used. Shelter-belts should be planted on the side of the pre- vailing winds. In some places this is on the southwest side of the group of farm buildings to protect the premises from hottest winds of summer. The coldest winds of winter will be checked by planting trees along the north and northwest. Probably the planting of belts along the north and west sides would be best in most cases. In prairie countries and in dry climates the shelter-belts should be used to protect fields of crops from both the blast- ing winds of summer and the storms of winter. Kinds of Trees. — There has always been a tendency in the prairie States to plant trees that would grow quickly. These are not the best kinds because, as a rule, they are short-lived and the plantation is soon gone. The more permanent kinds of trees should be chosen. The revenue to be derived from the sale of fuel, posts, poles, and lumber should be considered in the choice of varieties. Chestnut groves have often paid a good return for their cost in the nuts produced for market. Walnut is a slower growing wood than cottonwood, but when mature will return a much larger income for each year of its growth. Trees with deep root systems should be chosen if the trees are to grow near other crops, as the surface soil will not be dried out so fast. Such trees would be walnut, hickory, hardy catalpa, chestnut, locust, and others. All of these have valuable woods. Propagation of Forest Trees. — Nearly all kinds of forest trees are propagated by seeds. Willows and a few others are easily increased by cuttings. The seeds for planting should be mature and as freshly gathered as possible. It is quite difficult to germinate some tree seeds that are very old and dry. THE PRINCIPLES OF FORESTRY 183 The nuts of black walnut, hickory, chestnut, and others, and the pits of the plum, peach, and cherry should be either spread between layers of moist sand or planted in the fall where they are to grow. They should not be allowed to dry out after ripening. The larger nuts may be planted while doing shallow plowing, by dropping them in a furrow and covering them with the next furrow slice. The deep root system formed by most of the true nut- bearing trees makes them difficult to transplant, even when young. FIG. 90. — Lattice supported on poles. Such a structure gives alternate light and shade in growing forest seedlings, tobacco, ginseng, and a few other plants. (Plant Industry.) Seeds that ripen in spring and early summer should be planted within a few weeks, as they live but a short time. The American elm, soft maple, and cottonwood are examples of this group, but the red elm is an exception, as the seeds will not sprout until the next spring. Seeds of trees that ripen in the fall, except the evergreens, may be planted either the same fall or the following spring. If planted in the fall they should be covered with a leaf mulch and also protected from squirrels and other animals. The cone-bearing trees, including the pine, spruce, tama- rack, and white cedar are started from seed sown in the 13 184 PRODUCTIVE FARMING spring under partial shade. This partial shade may be made by a lattice work supported on poles (Fig. 90) . Rather sandy soil is best for the starting of these seeds, which are planted very shallow. They may be sown either broadcast or thickly in drills with the rows close together. Before young trees of any of the kinds become too crowded in the seed beds they should be transplanted. If they are too small to be used in the forest plantation they are put in rows far enough apart to cultivate in a forest nursery. It is a very common practice to keep young trees in the forest nursery for one or more years. EXERCISE. — Starting Tree Seeds. — Col- lect from the woods, or buy from a seed store, seeds of ash, birch, hard maple, and box elder. Plant them in a window box in loose black soil, covering them to a depth of about one inch. Moisten the soil from time to time and observe the time required for germination of eacb kind. Note the methods they have of coming out of the soil. How many seed- leaves have they ? (Fig. 91.) ^Distances Apart for Trees. — The Forest Service recom- mends that in a wood-lot or forest plantation most trees be set four feet apart each way. It is the aim to get the soil shaded by the trees as soon as possible, and to use all the space for tree growth after the first year. The first year a low-growing crop requiring cultivation may be planted in the rows with the young trees. Potatoes may be used for this purpose one season only. Another plan followed in some forest planting is to plant the trees two feet apart in the rows with eight feet between the rows. In this plan the space between rows may be used for other cultivated crops for several years. The trees can FIG. 91. — Young maple-tree seedling showing the first seed- leaves still clinging. THE PRINCIPLES OF FORESTRY 185 be cultivated for a much longer period than where they are only four feet apart. Mixed plantings are made by setting alternate rows of two or three varieties. There are a number of advantages derived from the mixing of the trees instead of planting only one kind (Fig. 92) : FIG. 92. — A shelter-belt of mixed hard woods. This form of fence will protect the forest from grazing stock. (Plant Industry.) 1. There is less danger of total loss from drought, insects, and diseases. 2. Rapid-growing trees may temporarily fill the area while the slower and more permanent ones are becoming large enough. 186 PRODUCTIVE FARMING 3. Tender kinds, such as Scotch pine, do much better when partially protected by more hardy trees. 4. Mixed plantings are more beautiful and interesting. 5. Birds are attracted by the greater variety of food and shelter. 6. The ground is usually better shaded by mixed planting. Tall trees with thin foliage, such as maple and birch, may be FIG. 93. FIG. 94. FIG. 94a. FIG. 93. — A pine tree growing in an open place, holding the leaves out to the light. FIG. 94. — Pines and other trees grown in a dense forest, which is now mostly cleared away. FIG. 94a. — Sugar maple tree yields sap in early spring. alternated with those which have dense foliage and can endure shade well, such as spruce and beech. EXERCISE. — Distance Apart and Shape. — In a wood-lot or other place where trees are growing close together, notice the distance from the ground to the first side limbs that are beneath the shade of other trees (Fig. 94). Compare these with trees of the same kind growing in open places. In a dense forest the side limbs are shaded from the light and THE PRINCIPLES OF FORESTRY 187 may soon die and drop off. 'Those in the open grow large because of the light all about them (Fig. 93). Which would produce clear lumber and which would be knotty ? EXERCISE. — Rings of Wood. — Have some one bring to school a circular section cut across the end of a tree trunk, FlO. 95. — Method of mounting wood samples for study. (Agricultural Education.) showing the rines of wood. Each ring represents one season of growth. Count them. Are some wider than others? Are the wide rings indications of favorable or of unfavorable seasons of growth ? Notice the dark heart-wood in the center and the light colored sap-wood near the bark. Figure 95 represents a good method of saving samples for future study. 188 PRODUCTIVE FARMING Planting the Trees. — When wood-lots and wide shelter- belts are to be planted, the ground should be prepared by plowing and harrowing, unless it is too rough or stony. The trees from the seed bed or forest nursery are transplanted to their new location when of suitable size. The size depends upon the kind and size of those with which they are to be planted. Evergreens may be transplanted whenever new shoots are not growing, but late spring is probably the best time. Early spring is best for other trees and shrubs. When very small seedlings are to be planted in great numbers, a small but deep opening is made by thrusting a narrow spade into the plowed soil and moving the handle back and forth. The spade is removed and the little tree roots pushed to the bottom of the hole. The soil is then pressed in about the roots and at the same time the little tree is lifted to make it of proper depth. This plan of planting is very rapid. Larger Trees must be planted with more care. The holes should be larger and deeper than the trees seem to require. Prune all broken or bruised roots. Prune off some of the top, to somewhat balance the reduced root surface. Place loose rich soil in the bottom to come in contact with the roots. The tree should IOQ a little deeper in the ground than it was before. Fill the hole with the best soil and tramp it in well, but leave a layer of rather loose soil on the surface. EXERCISE. — Arbor Day Planting. — Plan for the planting of trees and shrubs on the school grounds on Arbor Day and other spring days. Have the places for planting each shrub or tree determined in advance. Study the principles laid down in the reference bulletins and in this book, to make the school grounds very beautiful. Ornamental Planting. — One of the best plans for the planting of trees on Eastern farms, and indeed everywhere, is to place them where they will lend a degree of beauty to the farm home. The appearance of the surroundings may THE PRINCIPLES OF FORESTRY 189 be wonderfully improved by planting in suitable places a number of well chosen kinds of trees. Care and Management. — The farm wood-lot should be managed in such a way as to produce regular harvests of fuel, lumber, posts, and railroad ties, through a long series of years. Advancing prices of these materials make the wood-lot a very profitable part of the farm. In the proper management of the wood-lot there are a number of principles to be applied. Some of the most important are given here: 1. In cutting the crop take those trees that are ripe, not the young or middle-aged ones. 2. Save the small seedlings and saplings to renew the forest when the old trees are harvested. 3. Take out the badly shaped and diseased trees and those of inferior kind. Such are called weeds, and may be used for fuel. 4. Leave good specimens that are old enough to bear good crops of seed. These will naturally re-seed the wood-lot and keep it supplied with young growth. 5. Usually the wood-lot should not be used as a pasture. This destroys the young trees and the future life of the forest. The leaf mulch is never good in a pasture. 6. The stand of trees left at any time must be neither too thin nor too thick, as this affects the shape of the trees (Figs. 93, 94). 7. Some kinds that send up shoots from the stumps, called coppice growth, must be thinned to avoid crowding. Catalpa, chestnut, locust, mulberry, osage orange, and others send up rapidly-growing coppice from the stumps. 8. Trees damaged by storms should be harvested before insects and diseases attack them, as these often spread to healthier trees. 9. Always pile up and burn the waste brush after each harvest. This will check the spread of insects, and reduce the danger from fire. 190 PRODUCTIVE FARMING 10. Post up legal notices furnished by the State authorities to warn all campers and hunters against forest fires. 11. Replant belts destroyed by fire or storm. EXERCISE. — Kinds of Trees. — Collect twigs of the ever- greens and other trees and have pupils name them for the class. They may learn the names at home or elsewhere if none in the class know them. Students should learn what ones are most valued for posts, for lumber, and other uses. REVIEW. 1. What are some of the common uses to be derived from the farm wood-lot ? 2. In what way is a forest of public benefit ? 3. Tell of the influence of a grove of trees on the temperature of the soil.. 4. How does a forest control soil moisture ? 5. Why should homes be protected by trees ? 6. How are streams affected when forests are cut off ? 7. How does a forest help to prevent a flood ? 8. On what sides of the farmstead should shelter-belts be grown ? 9. What width is suggested for these shelter-belts? Why is one row of trees not the best ? 10. What things must be considered in deciding what trees to plant ? 11. What tree seeds must be planted or put in moist sand in the fall? 12. Which are planted in early summer? 13. Tell when and how to start seeds of the cone-bearing trees. 14. Give distances apart for planting trees in the wood-lot, and compare the two plans given. 15. Mention several advantages of mixed planting. 16. How does the distance apart affect the shape of trees? 17. Tell how to plant small seedlings in the wood-lot. 18. Describe the planting of a larger tree. 19. How are wood-lots naturally re-seeded ? 20. What are forest weeds ? What should be done with them ? 21. Why not use the wood-lot as a pasture ? 22. Mention one way of preventing forest insects and diseases. 23. Mention two ways to help prevent forest fires. References.-- United States Farmers' Bulletins: 516, Maple Sirup and Sugar; 622, Basket Willow Culture; 700, Pecan Culture; 711, Care and Improvement of the Woodlot; 715, Woodlot Products ; 744, Pre- servative Treatment of Farm Timbers ; 788, The Windbreak as a Farm Asset. GARDENING 191 /- CHAPTER XVIII. GARDENING. IN the broad sense the word horticulture is used to include fruit growing, vegetable growing, the production of flowers, ornamental trees and shrubs, and the uses of these in beau- tiful landscape effects about lands and buildings. We have already considered the subject of fruit growing. Vegetable Gardening. — The growing of vegetables has been given the name olericulture. Farmers may grow vege- tables either for home use or for market. Gardening is always a special line of farming, and may be called intensive agriculture. Large returns are secured from small areas. Several hundred dollars per acre may be ex- pected from a good market garden. Elements of Success. — To be very successful in growing good vegetables several conditions are required : 1. The soil must be rich and well drained. 2. It must be supplied with plenty of humus to retain moisture. It should be manured heavily. 3. Sandy loam is necessary if vegetables are to be ready for early market. 4. The soil should be plowed deep and the most thorough tillage of crops practiced. 5. The best methods for the prevention of weeds must be practiced. Never allow weeds to scatter seed or spread by other means in the garden. 6. Select good varieties for the table and market, and have the products ready for all seasons. 7. Prepare produce attractively for market. 8. Gather the best seeds from the best plants for future planting; or if seeds are purchased, get the best possible. Planning the Garden. — The best plan for planting the 192 PRODUCTIVE FARMING garden is to have the crops in long rows, not in "beds." Have the rows run the longest way of the garden, preferably north and south (Fig. 96), and have the garden long enough so that a horse may be used both in plowing the soil and in cultivating the crops. Plant the rows far enough apart to allow the use of a cultivator drawn by horse power. See Table XII in the Appendix. Much more profit may be gained from a garden cultivated by horse power. Too much hand weeding and FIG. 96.-^-School gardening in California with the long rows instead of. small beds. Irrigation water is just flowing in the center of the garden fr.om the portable flume or trough along the edge of the garden. (Agricultural Education.) hoeing is irksome and is too often neglected. Hand labor is always more expensive than horse labor in the garden. The perennials or permanent crops, such as asparagus, rhubarb, horse-radish and many of the sweet herbs, should be planted along one side of the garden near the bush fruits. They will then be out of the way when plowing the rest of the garden (Fig. 97). Time of Planting. — Some plants used in the garden are very tender and must not be planted in the open garden in spring until all danger of frost is over. Others are quite hardy and may be planted as early as the soil can be prepared. The following lists may be referred to by beginners: GARDENING 193 Hardy vegetables which will endure a frost after sprout- ing in the spring: asparagus endive parsnip beets horse-radish peas cabbage kale radish carrot lettuce rhubarb cauliflower onions salsify celery parsley spinach cress potato turnip Late and early plantings of several of these may be made. Injured by Frost. — These vegetables will be injured by a slight frost. They should be planted after all danger of it is over: beans of all kinds muskmelon squash corn okra sweet potato cucumber pepper tomato egg-plant pumpkin watermelon There are several of this group that should be started earlier than the last spring frost. The seed may be planted in hot-beds or in window-boxes in the home or school. Egg- plant, pepper, tomato and sweet potato are usually thus started in early spring. Planting Seed. — Such large seeds as corn, beans, peas, squash, pumpkin, and melons may be covered with two inches or more of soil. Small seeds must be planted very shallow. If the soil be rather damp or heavy the planting should be shallower than in light, dry soil. When seeds are planted the soils should be pressed firmly down upon them, so that the soil moisture will soften the seed and cause it to sprout. For seeds planted in hills it is well to walk on the covered seeds. After the packing is done with the foot or with a roller, the rake should be drawn lightly over the top to leave a loose soil mulch. This saves the moisture by pre- venting its escape into the air. Setting Garden Plants. — Those garden plants which are started indoors for protection should be strong, healthy plants when set in the garden after the weather is settled. 194 PRODUCTIVE FARMING Care must be exercised in setting the plants in the garden. Avoid the hot sun, and if possible do the work in the evening. Save all the root of the young plant, but a little pruning of the leaf surface may be made. Make the hole in the mellow garden soil deep enough to avoid doubling the root. A dibber is used in the planting. i i FIG. 97. — Plan of ten-acre farm-school. The rotation of crops is to be changed to suit each locality. (Agricultural Education.) Set the plant a little deeper than it grew before. Water, if necessary, before filling in all the dirt. Fill in around the roots and plant with the very finest soil. Press this down well, but leave a little quite loose on top. Hot=bed or Cold=frame. — For the starting of early vege- tables a hot-bed is of great aid. Plants may be grown in it to be set in the garden later. Early crops of lettuce and GARDENING 195 radish may be grown during late winter. Make a tight frame of boards, perhaps six by nine feet, or to suit the size of the glass (Fig. 98). This should be about two feet deep on the north side and six or eight inches less on the south side. This gives a slope to the window sash to catch the rays of the sun. The hot-bed should have in the bottom ten inches of firmly tramped horse manure that has begun to heat a little. Cover this with five or six inches of rich garden soil. FIG. 98. — A back-yard hot-bed. These sashes were made for this special purpose with lap glasses to shed off water. The cold-frame is made in the same way but does not have the heating manure in the bottom to warm the soil. It is usually placed on the south side of a building or high fence to secure the best effects from the sun's heat. Care must be exercised not to let the temperature in these frames vary too much. On cold nights, carpets or blankets may be thrown over the glass. When the sun is very hot, the glass is raised a little or taken off to let out the surplus moisture and hot air (Fig. 99). e Double Cropping. — Market gardeners often raise two or more crops on the same ground in a season. This is called double cropping. 196 PRODUCTIVE FARMING If the crops follow one after another it is succession* cropping. Such crops must mature quickly. Early peas or radish or lettuce may be followed by tomatoes, late cabbage or celery. If the crops are grown together in the garden for all or part of their time the system is called companion-cropping. One of these crops matures early and the other is started between the rows before the first crop is harvested (Fig. 100). An example would be early onions with cabbage. With some vegetables both the crops may be drilled in the row FIG. 99. — A market gardener's hot-beds for the forcing ot early vegetables and starting plants fqr the open ground. (Plant Industry.) together, as when radishes and beets are planted. The radishes are harvested by the time the beets need the room. Early and late celery may be grown together. When the first crop is sold the late crop is ready to use all the space. Storing Vegetables. — Vegetables of several kinds may be stored for winter use. Onions should be well dried before storing. They are to be handled without bruising, and are spread in single layers on open shelves in a dry place where they will not freeze. Celery and cabbage may be transplanted to a cold cel^* before the ground freezes. Keep the soil moist about the roots and they will keep all winter. GARDENING 197 Beets, turnips, and similar root crops may be covered with dry dirt in a cellar box. This will keep them from dry- ing too much. Tomato vines may be pulled up before heavy frost and suspended from the ceiling in a cellar or cool room. As the green tomatoes ripen they may be wrapped in paper and kept several weeks. Hubbard squashes, pumpkins and watermelons need to be handled without bruising and kept in a dry, cold cellar. By storing vegetables for late fall and FIG. 100. — Harvest in the spring-time, from the school garden. (Agricultural Education.) winter use, and starting a hot-bed for late winter and early spring use, we can supplement the summer garden and have vegetables for home use all the year. EXERCISE. — Frost and Rainfall. — Write to the Weather Bureau, ao Washington, and get the summary of the weather record for your section. Find the dates when the late spring frosts and the early fall frosts occur. Look up, also, the annual rainfall and see how many inches of this rain falls in the summer months. It is good practice for the members of the class to keep records of frosts in fall and spring. The time of planting garden vegetables may be governed by these records. 198 PRODUCTIVE FARMING School Gardening. — The principles already given for vegetable gardening at home may be used in the school garden. Let the rows be long, and each student may have -—10 Rods- nnnuDDDUDDQD&BH DDDDDDDDBSB FIG. 101. — Planting plan for a one-acre school-yard, with school garden plots at the rear. The trees and shrubs are not scattered over the lawns and playground. (Agricultural Education.) a whole row or a section across several rows instead of a small bed. In this way the students can learn to garden as at home. They may use the drill and wheel hoe if the school can afford these implements. GARDENING The place for the school garden should be handy to the school but not necessarily on the land owned by the school. Do not let its location interfere with the school play-ground. See the location in Figs. 97 and 101. The garden need not be very large, but let the size be whatever is available and make the best use of it. Equipment and Seeds. — Under most circumstances a fence will be required. A neat woven wire fence wiU keep out chickens and dogs as well as larger animals. The school need not own the plow and horse tools. The horse work will be done by volunteers or by those paid for doing it. The school may own several good hand rakes and dibbers, a few hoes, a few spades, lines and stakes for marking the rows, and some sprinklers for watering. Seeds may be purchased in small packages, and schools may also get seeds for school gardening by writing to the Bureau of Plant Industry, United States Department of Agriculture, Wash- ington, D. C. EXERCISE. — Making a Hot-bed. — Allow the larger boys to make a hot-bed according to directions in this chapter. (See Fig. 98.) Probably most of the materials may be brought by students. Two small sashes may be held together by two strips of wood along the edges. When it is all made, put in the manure and soil, and when the bed has become warm plant lettuce and radish seeds. It is well to keep a thermometer inside as a guide in governing the temperature. What to Plant. — One plan to follow in the spring work in the school garden is to plant such crops as will give results before school closes for the vacation (Fig. 102). Some of the quickest crops for spring use are lettuce, radish, early peas, onion sets, spinach, early carrots, and in some cases there might be time to grow very early potatoes. The plants that could be left growing in the school garden through the summer vacation would be late potatoes, tomatoes, squashes, egg-plants, late beans, late cabbages, 14 200 PRODUCTIVE FARMING late onions, late beets, turnips, and celery. These should be taken care of by some one living near who is appointed for the purpose. The summer garden is too often neglected. Rhubarb and asparagus may be planted in spring, and when well established will be a good feature of the spring garden. The fall season is not a bad time to start a school garden. At that season we may start vegetables that will live over winter, such as kale, winter onions, spinach, and others. The cold-frame may be used to store over winter plants that were started in the warm fall weather. Lettuce, cabbage, and FIG. 102. — Children's garden, Red Wing, Minn. (Agricultural Education.) cauliflower may be kept over and get an early start the fol- lowing spring. The hot-bed may be used in the fall to produce quick crops of lettuce and radishes. Fruits and flowers should also be used a great deal in the school garden. Select those which will bear the blossoms and fruit at a time when the school is in session. Early strawberries may be used if school is not closed too early. Plant the permanent crops at one side of the garden to allow free use of the plow in preparing for annual planting. (See Fig. 97.) Garden Experiments. — The school garden in both city and country should be a place to experiment. Something GARDENING 201 should be learned besides how plants grow. Such experi- ments as some of the following may be tried even in window boxes, or plant trays (Fig. 103) : Determine the influence of depth of planting as sug- gested by Fig. 77. But try it in the garden as well as in the school-room. B FIG. 103.— A. The roof garden made by children. The city is a place where many experiments may be tried. B. School garden work; a lesson in thinning plants. (Agricultural Education.) Compare two parts of a row with and without dust- mulch methods. Try potatoes by the "level culture" and the "hilling up" methods. Grow crops that are not commonly raised in the section; perhaps some new legumes, as alfalfa, cow peas, soy beans, or vetch. The effects of certain fertilizers or of lime may be tried 202 PRODUCTIVE FARMING on certain rows and other rows next to them left untreated. In like manner the effects of spraying may be tested. Many soil experiments may be tried in the garden. Test the soil with litmus paper for acids. Test the temperature of the soil in spring and fall. Cover a square foot with black material, as charcoal, and another square with lime. Then test the soil again to see if the sun heats one soil more than the other. Which? Compare the packing, baking, and crusting effects of sandy soil and clay soil. Germination tests may be made to show the benefits of pressing the soil against planted seeds; to show the effect of too much water, which excludes the air; to determine the length of time for sprouting of seeds of different size, as large and small radish seed, or the tip kernels and middle kernels of an ear of corn. Use of Products. — If there be suitable products from the school garden let them first be used for making up an exhibit at school. Later they may be sold to get money for the garden expenses. School Garden Plots at Home. — Much of the summer gardening may be done at home by the students. Parents should be requested to set aside a stated area for use of the pupils at their homes. On this plot they may grow the crops desired for school exhibits. Corn and other crops may be grown in home plots better than at school during vacation. Let fertilizer experiments, culture trials, and spraying be conducted by the students on the home plots. Suitable bulletins and leaflets may be obtained outlining contests to be carried on during the vacation. The products may be shown at school in the fall. Ornamental Gardening. — The appropriate use of trees, shrubs, vines, greensward, or grass plots, and flowering plants to adorn a place is sometimes called landscape gar- dening. Too little thought is given to this by the average GARDENING 203 person. The school grounds and the home grounds too often show no ornamental planting. Principles of Planting. — There should be a lawn on which green grass is growing thriftily, but which is well trimmed. This should cover most of the area. The trees and shrubs should not be planted in rows nor scattered at random over this greensward. They should be in groups, masses, borders, and corners (Fig. 104). Large trees may be in rows along roads or streets. Fio. 104. — Arrangement of shrubs at the bays and angles of the walks to give a pleasing picture. Shrubs may fringe curved walks and driveways, but are more satisfactory if massed in the angles or curves of the driveways. Let them form the footing about the foundations of buildings — hiding the naked feet of the structure. Masses of shrubs and trees or vines on trellises should hide any unsightly structures from view (Fig. 105). Let all the planting assume grace and natural curvature of outline. Do not prune the evergreens and shrubs to 204 PRODUCTIVE FARMING assume grotesque and artificial forms. Such were the fashions of ornamental gardening many years ago. The lower branches of evergreens and shrubs should be left near the ground and carry the pleasing effect of blending the foliage with the greensward (Fig. 106). Vines may be used about porches and on trellises over the corners and in the angles of buildings. They remedy the angular effects and lend a softening beauty to the rugged structure. The School Grounds should come in for their full share of attention in the study of ornamental planting. Dr. L. H. Fia. 105. — Vines are here used to cover a glaring white stone building. The mass of trees at the left is used to hide low buildings. Bailey has described the conditions on the average rural school grounds as "bare, harsh, cheerless, immodest." These are some reasons assigned for children disliking the school. Let a change be made. Have plans made before the opening of spring. EXERCISE. — Plans for Planting. — Make a sketch of the grounds showing the permanent structures, well, fences, and any trees now growing. Add to this the proposed plant- ings for the spring. Indicate these by lines such as are used in Figs. 97 and 101. Use United States Farmers' Bulletins 185 and 248 to aid in making the plans. The former will suggest what plants to use. Students may supply these from home, GARDENING 205 or they may be obtained from the native woods or from nurseries. Planting may be done on any suitable days in early spring. Protect the roots of trees well before they are planted. The easiest way is to make a little trench, put the Fio. 106. — Evergreens may be planted in close masses and also as single specimens/ roots in these and cover with dirt until the permanent places are ready. Evergreens need to be handled with the greatest care, because they are constantly losing moisture through the leaves. The soil should not be removed from the roots at all while being transplanted. They may be set into small boxes while being carried, or the soil may be kept on by wrapping with old carpet or sacking. REVIEW. 1. What is horticulture? Olericulture? 2. Give several elements of success in growing good vegetables. 3. Describe a good plan for the vegetable garden. 4. Name ten garden plants that can stand some frost. 5. Name ten that are injured by frost. 6. Give directions for depth of planting seeds in heavy and light soils. 7. Tell how to set out tomatoes and other garden plants. 8. What is a hot-bed? A cold-frame? 9. In what two ways is a hot-bed heated? 10. What are the uses of a hot-bed? 11. What is succession-cropping? Give examples. 12. What is companion-cropping? Give examples. 206 PRODUCTIVE FARMING 13. Tell how to store for winter use some of the common vegetables. 14. What is the best kind of fence for the school garden? 15. What are some of the best vegetables for the spring garden at school or at home? 16. What ones may be planted in spring for fall use? 17. What ones may be started in fall and live over winter? 18. Mention some experiments to try in the school garden. 19. Should shrubs and trees be scattered over the lawn? 20. Where should they be planted? 21. Tell of good uses for vines. References. — United States Farmers' Bulletins: 218, School Gar- den; 232, Okra; 254, Cucumbers; 289, Beans; 354, Onion Culture; 433, Cabbage; 434, Onion Seed and Sets. 255 and 647, Home Vegetable Garden; 494, Lawns; 583, Moles; 642, Tomatoes; 707, Cantaloupes; 818, Small Vegetable Garden ; 839, Canning ; 841, Drying. CHAPTER XIX. FRUIT PRODUCTION. THERE is an active interest in the growing of good fruit. Almost every farmer is interested in the subject. He may grow it for his own use if not for market. Fruit may be con- sidered among the luxuries of the table. As the people become more prosperous they call for more such luxuries. Thus the demand for fruit of the best quality is increasing. The Orchard. — The production of fruit naturally involves more time than the growth of most farm crops. For this reason more care must be exercised to have the best condi- tions possible from the very beginning. The Orchard Site. — Exposure, soil, and air-drainage are all-important considerations. If the orchard is somewhat above the surrounding land, the cold air of frosty spring nights can drain away. Thus the early blossoms may be saved from injury. Strong westerly winds are often inju- rious to trees and, therefore, an easterly or northeasterly slope is preferred. If a south slope were chosen this might cause more movement of sap in winter or very early spring. We should avoid forcing the spring growth too early. FRUIT PRODUCTION 207 Heavy soils are well suited to the growth of apples and pears; while the lighter soils are better for peaches, American plums and grapes. The propagation of fruit trees at home and in nurseries has been described. (See Chap. III.) When to Plant Fruit Trees. — The age of a fruit tree is counted from the time of its first spring growth after b lidding or grafting. Peach and plum trees are usually transplanted to the orchard after one season's growth in the nursery. They are then called yearling trees. Apple trees for orchard planting may be either one or two years old. Some orchardists prefer the younger trees, while others want them older. The planting may be done in late fall or early spring, the latter being preferred. Setting Orchard Trees. — As much fibrous root should be preserved as possible. The roots should be kept from the wind and sun to prevent drying out. As soon as delivered at the orchard, heel them in. That means to cover the roots with soil in a temporary trench. The holes should be large and some of the best loose dirt thrown in the bottom before the tree is placed in it. The roots are to be straightened out, not bent. Pack the richest dirt well, but leave a mulch of loose soil on top to prevent evaporation of soil moisture. In dry weather and in dry climates it is well to haul water in barrels or tanks and water each tree soon after it is set. The loose soil is to be put on after the water has soaked into the soil. Principles of Pruning. — The pruning of trees is very essential in securing the best results in fruit growing. Var- ious parts naturally crowd each other; the fruit is smaller as a result of this. Twigs or branches become diseased and should be cut out. Limbs may break in the wind and should 208 PEODUCTIVE FARMING be sawed off smoothly so the wounds may heal quickly. In spite of these conditions we find many old orchards that are neglected and never pruned. Young Trees. — When a young orchard is set out the roots should be examined and any broken or split surface made smooth with a sharp knife. The straggling or extra long roots should be cut back. The tops should be cut back to a suitable height. With a one-year-old tree this may cause the formation of side branches to make the future head of FIG. 107. Fic». 108. FIG. 107. — Peach tree headed too high. FIG. 108. — Low-headed peach tree at pruning time. the tree. It is best to head trees low enough so they will be within easy reach of pickers. Compare Figs. 107, 108. Fig. 109 shows the relative position of the young twigs that will become the future main branches: (A) represents the position of these on an imaginary circle drawn around the tree. Here there are three branches; perhaps four would do as well. These should be at different heights on the main stem (B), to avoid splitting away from each other when there is a heavy wind or load of fruit. Annual Pruning. — As the trees grow older it is well to cut back a part of the new growth each year to induce proper FRUIT PRODUCTION 209 branching of the long shoots. This will induce the formation of fruit buds, fruit spurs and future fruit crops lower down on the branches, and the support will be better. Flo. 109. — A shows the choice limbs which extend in different directions from the main axis; others are cut away. B shows the same limb of the mature tree. If they are the same height they will be split off too easily by wind when loaded with fruit FIG. 110.— Yearling peach tree, before and after pruning. Cut out some side twigs where they strike across through the tree top. Prune where they are too thick; such pruning is equivalent to thinning the fruit, making it larger. Let in the sunlight. Cut out all dead or diseased or broken parts. Prune where branches rub together. (Fig. 110.) 210 PRODUCTIVE FARMING Care in Pruning. — Avoid cutting very large branches if several smaller cuts will accomplish the same result. Large wounds are apt to lead to internal decay. Leave the cut surfaces as smooth as possible. If a saw is ever used, the wound should be smoothed with a knife. Cut side limbs as close to the main stems as possible. Never leave stubs (Fig. 111). Cover the exposed tissues of the larger cut surfaces with paint or grafting wax to prevent weathering and decay. Time to Prune. — Pruning by pinching off small shoots and disbudding can be practised to very good, advantage in FIG. 111. — Side limbs should be cut very close to the main stem, so the place may heal over and get "well." A was properly pruned ; B was pruned too far out. the summer time (Fig. 112). The main pruning, however, is done in very early spring before the sap begins to flow. Some plants, such as grape vines, will bleed or lose much sap if pruned too late in the spring. EXERCISE. — Fruit Buds. — Twigs bearing both fruit buds and leaf buds may be selected from the different kinds of fruit trees in the neighborhood. Compare these and learn to recognize fruit buds on trees in winter (Fig. 113). EXERCISE. — Pruning. — A small tree or upright branch from the wood-lot may be cut and brought to school. Let pupils first mark with chalk what limbs and twigs should be taken off. Then have the pruning done in accordance with the lesson taught in Fig. 109. Either sharp knives or special pruning shears (Fig. 114) may be used in this exercise. FRUIT PRODUCTION Culture. — The young orchard should be kept growing rapidly. Considerable organic matter and nitrogen in the soil will help produce this early growth. To obtain these materials the best fruit growers sow cover crops in the orchard each year, to be plowed under in the spring. If these crops are composed partly of legumes, such as crimson clover and Flo. 112. — Young peach tree, summer pruned by pinching off small shoots. winter vetch, they will gather the nitrogen for the young trees tp use. After the cover crop or green manure is plowed under in spring the ground is kept well harrowed until mid- summer (Fig. 115); then the cover crop is again sown. One influence of the fall cover crop is to check late fall growth, especially in peach trees, and cause the season's growth to harden up for winter. PRODUCTIVE FARMING The first year or two some orchardists grow a crop for market between the trees. In such cases this crop should have clean culture until July or August. Fall cultivation is not desirable, as the young shoots are more apt to winter- Flo. 113. — Fruit buds and spurs of four common fruit trees, apple and pear at left, plum and cherry at right. kill if kept growing too late. For economy of space peaches are frequently used as fliers or temporary trees, in rows between apple trees. The peach trees come into bearing by the 'third or fourth summer and may be past their prime the time the apple trees are large enough to fill the between rows. The peach trees are then cut out. •mg by ime by 'fw FIG. 114. — Several forms of hand pruning shears. fillers are used, the permanent trees should be^fc from thirty to forty feet apart, according to variety and Wf Varieties. — Choose varieties carefully. There are many good varieties to choose from, in all kinds of fruit. Select those which are known to do well in your own climate and on similar soils. Prof. M. A. Blake, of the New Jersey i FRUIT PRODUCTION 213 Experiment Station, names the following varieties of peaches in order of ripening as a suitable list from which to choose: Carman, Hiley, Champion, Belle of Georgia, Elberta, Fox Seedling, Edgemont Beauty, Iron Mountain, and KrummeJ October ^^ VarieMPof apples are classified as summer, fall, and winter, ^Wording to the season when they are in prime con- FIG. 115. — Cultivating an orchard with a disk harrow. Where the land is level enough to prevent bad washing of the soil, orchards should be cultivated throughout the first half of each summer. Plows and disk harrows may be used in early spring. These are followed by spike-toothed harrows or light cultivators. dition of maturity. Good varieties may be chosen from the following lists : Summer Yellow Transparent Williams Early Red Duchess of Oldenburg Maiden Blush Gravenstein Fall Wealthy Twenty Ounce Mclntosh Red Grimes Golden Jonathan Winter Tompkins King Baldwin Rome Beauty York Imperial Stayman Winesap The above is merely a suggestive list. The planter is to be governed in his choice of varieties by the results of other growers about him in his vicinity. Only one or two varietiea of each season should be grown for market purposes. 214 PRODUCTIVE FARMING EXERCISE. — Studying Apples. — In the fall or winter let students each bring to school good type specimens of apples. Let each tell the names of the apples he brings. The col- lection may be studied and the varieties compared so the students will learn to know many of them. At noon or recess on the last day of this study let the aptjles be cut into sections so that they may be sampled as 'to flavor, texture, and value. Strawberries. — One of the best fruits for home use, as well as for market, is the strawberry. There are not many difficulties in growing this crop successfully. Probably the FIG. 110. — The hedge-row system of raisin? strawberries. The straw mulch is kept between the rows until after picking time. greatest difficulty is in harvesting the crop after it is grown. Strawberries thrive best in a very rich black sandy loam. Two Methods of Planting. — There are several methods of planting strawberries. Two are here described, (1) the hedge-row system and (2) the matted-row system. In either system the plants may be set in the early spring, or in August if the weather is favorable. In the hedge row system (Fig. 116) the rows are three feet apart and the plants are set two feet apart in the rows. The runners, which all strawber- ries send out, are kept cut off with a hoe or wheel cutter; except that about three runners are placed and allowed to take root between each two plants, making the plants about six FRUIT PRODUCTION inches apart in the row. Frequent cultivation is practised throughout the first season and the blossoms are picked off to prevent any fruit from forming. About December first a clean mulch of straw or other clean litter is spread over the soil and vines to a depth of two or three inches. In spring this mulch is parted just a little over the rows to let the green leaves come through, and the mulch remains on the soil between the rows until the crop of fruit is all picked. Then the plants are mown and the mulch and tops raked and burned. This destroys the diseases and insects. Thorough cultivation is given until late fall and a mulch is again put on as before. After two or three crops are obtained, the plants are plowed under. In the matted row system of planting, the plants are set three and one-half or four feet apart and the plants about two feet apart in the row. Cultivation is given the first year, but many of the runners sent out by the plants are allowed to " take root " and form new plants in the middles or aisles within about one foot on each side of the mother plants. A mulch should be applied for winter, but it is again removed in the spring. After the crop is picked each year the weeds are pulled by hand from the wide matted row of plants formed by the runners. The narrow strips are cultivated as before. When two crops are obtained the vines should be plowed under. Comparison of the Two Systems. — The hedge-row system requires more vigilant care to prevent runners from taking root, and an equal amount of horse power cultivation is given to the plants. But there is very little hand weeding necessary, as in the matted row. The mulch kept on the soil through the berry-forming months keeps the fruit cleaner; it keeps down weeds, and conserves the soil moist- ure. In the hedge-row system the berries are larger and cleaner; the yield of marketable fruit is greater, and the work of picking is less. 15 216 PRODUCTIVE FARMING Varieties. — The many varieties of strawberries are grouped under two heads (Fig. 117), (a) Those with perfect blossoms, bearing both stamens and pistils, and able to pro- duce fruit without the aid of pollen from other plants; (6) Imperfect varieties, those which have no stamens to bear pollen, having pistils only; these must get their pollen from other perfect varieties near them. Perfect varieties may be planted alone. Imperfect varieties must grow by the side of or near perfect ones which blossom at the same time. The pollen is carried from one blossom to another by bees and other insects. For the choice of varieties and methods of growing strawberries reference is made to U. S. Farmers' Bulletin 198. FIG. 117. — Flowers of strawberry, pistillate on left and perfect on right. Other Small Fruits. — In addition to the fruits which have just been described, the home fruit garden should con- tain such fruits as grapes, black and red raspberries, black- berries, currants, and perhaps gooseberries. These are all so easily grown that very little special training is necessary for any one to produce enough fruit for home use. The site for the home fruit garden should be chosen not far from the resi- dence. The soil may then be enriched and put in good tilth. Pruning Small Fruits. — The beginner has greatest diffi- culty in questions of pruning. When the plants are being set out, all broken or decayed roots should be trimmed off; smooth-cut surfaces only should come next to the soil. The top should be cut back somewhat in proportion to the reduc- FRUIT PRODUCTION 217 tion of the root area in transplanting. This maintains the proper balance of root and top in the next season's growth. Grapes need very little of the old wood left for the fol- lowing season's growth of vines and crop of fruit. The fruit is annually borne on shoots of the same season's growth (Fig. 118). Better grapes are obtained by cutting away con- siderable of the old wood each winter. FIG. 118. — The grape-vine showing blossom clusters on the new shoots. Raspberries and Blackberries both bear their blossoms and berries on the end of new shoots. These shoots come from the last year's canes. In summer, after the crop is picked, cut out all of the old canes, and either head back or cut away entirely many of the young canes. This heavy pruning induces the growth of new canes from the crowns. These will bear the fruit branches next season. Currants and Gooseberries should not be pruned so much each year. The fruit is borne on both old and new wood, and only the very oldest parts need to be cut out. 218 PRODUCTIVE FARMING The Fruit Crop. — When good fruit has been grown it should never be handled carelessly. Never shake apples, peaches, or other kinds of fruit to the ground. Pick the crop > Flo. 119. — Picking apples from ladders with sacks hanging from shoulders. The fruit is not bruised. FIG. 120.— A. A good way to pack the best peaches for market. The crates each hold six half-peck baskets, and are called Georgia carriers. B. Sorting apples. For marketing they are packed in tight boxes and barrels. carefully, handling it almost as carefully as eggs. Bruised spots are the first to decay (Fig. 119). Pack the perishable kinds of fruit— grapes, berries, peaches, plums, and cherries — in suitable form for immediate FRUIT PRODUCTION 219 sale in the markets (Fig. 120, A). Peaches, plums, apples, and pears should be graded according to size, color, and other market features. More money is thus secured for the whole crop. When large and small apples are sold in the same barrel or box they bring only the price of small apples (Fig. 120). Grading machines are in use for sorting peaches or plums into several sizes; but the hand method is most com- mon. Study the figures showing methods of picking, sorting, packing, and marketing. Summer apples keep only a short time and must be mar- keted soon after they are ripe. Late fall and winter apples are often stored for sale or use later in the winter. A good method is to pack them in closed barrels and store in a cold cellar at a temperature just a little above freezing. When exposed to dry cellar air they shrivel badly. REVIEW. 1. Give reasons for pruning trees. 2. Tell what side limbs to save in pruning young trees just set in the orchard. 3. What annual pruning should be done in the orchard ? 4. Give several rules to observe in careful pruning. 5. Describe a good orchard site. 6. Describe good culture methods for young orchards. 7. What are fillers in an apple orchard ? Tell how used. 8. Name several varieties of peaches. How many of these have you seen? 9. Name some good summer apples. Fall. Winter. How many varieties do you know at sight ? 10. Describe the hedge-row system of growing strawberries. 11. Describe the matted-row system. 12. In what respects is one better than the other ? 13. What are perfect varieties of strawberries? Imperfect ? 14. Why should the grower know to which group any variety belongs? 15. Give suggestions regarding the pruning of grapes. 16. What pruning is done for raspberries and blackberries ? When ? References.— U. S. Farmers' Bulletins: 154 and 727, Home Fruit Garden; 181, Pruning; 471, Grapes; 482, Pears; 492, Enemies of Apple; 491, Apple Orchard; 631, 632, 633, Peaches; 643, Blackberries; 644, Grape Juice; 664, Strawberries; 670, Field Mice; 685, Persimmons; 696, Citrus Fruits; 702, Rabbits; 709, Muscadine Grapes; 710, Bridge Grafting; 728, Dewberry; 763, Barkbeetles; 804, Aphids. PRODUCTIVE FARMING CHAPTER XX. INSECTS. FARMERS) market gardeners, and fruit growers have their enemies to combat. Their crops and animals are attacked by numerous species of insects. It is estimated that hun- dreds of millions of dollars are lost by the American farmers annually from this cause. Fruit that is infested or deformed by insects will bring much lower prices than first-class fruit. Structure. — Insects are six-legged animals with the body made up of segments or covered with a series of rings. There are two pairs of wings, except that flies and mosquitoes have only one pair, and in a few species of all orders the wings are undeveloped or are entirely wanting, as in the case of the bedbug. All insects in the adult stage have the body divided into three parts: the head, the thorax, and the abdo- men. The head bears the mouth parts, the antennce or feelers, and the eyes. The thorax, or chest, bears the wings and three pairs of legs. See Fig. 122d. Many insects have enormous powers of flight, as in the cases of the dragon fly and the honey bee. The Rocky Mountain locust is a migrating insect and probably flies a hundred miles or more at a single flight. Some of the larger beetles seldom fly very far at a time. How Insects Feed. — The mouth parts of. insects are of two kinds: those fitted for biting, as in grasshoppers and beetles, and those suited for sucking the food, as in mos- quitoes, bedbugs, bees, butterflies, and others. Those with biting mouth parts have two pairs of jaws with which they cut and chew their food (Fig. 138). They consume the entire substance on which they feed, as bark, leaves, fruit, flowers, or other tissues (Fig. 121). Such insects, when found on the outside of plants, may be killed by the INSECTS 221 application of some poisonous material to the plants on which they feed, as when we put poison on potato vines to kill the potato beetles. When biting insects such as bark beetles and tree borers feed in protected places it is impossible to apply the poison, and some other remedy must be found if possible. To decide what remedy to use we must first know the kind of mouth parts and the feeding habits of the insects. Insects with sucking mouth parts usually live upon the sap of plants or the blood of animals; a few of them, such as bees, butterflies, and moths, largely feed upon the nectar of flowers. -The stone-fly and a few others get most of their FIG. 121. — Bean-weevil, natural size and enlarged, and a much infested bean. (From Smith's "Insect Friends and Enemies.") food when in the larva or youngest stage and have no true mouth parts when they come to the adult stage. Such insects live only a short time in the adult stage, their chief purpose being to lay eggs for the next brood; when this is done they soon die. The larva form of the butterfly has a biting mouth, while the adult has a sucking mouth. This is also true of flies and mosquitoes. As sucking insects get their food from the inside and not outside the objects on which they feed, we cannot poison them. We must resort to more difficult methods of fighting them. Contact insecticides are substances which will kill insects by coming into contact with them or by covering their bodies. 222 PRODUCTIVE FARMING The manner in which these insecticides kill is interesting. Insects breathe through pores or openings in the body — not through noses or mouths. When any material clogs these breathing pores the result is death. Suitable materials for this purpose are oils and powders. The oils may be mixed with other materials to prevent any damage to the plants on which the insects live. Kerosene emulsion and the miscible oils are so diluted that no damage will result to the trees or other plants. Fio. 122. — Moulting of a grasshopper: a nymph ready to change; b the skin split along the back and the adult emerging; c continues the process, and at d the insect is drying out. (From Smith's " Insect Friends and Enemies.") It must be remembered that these contact insecticides really smother the insects and must necessarily be applied when the insects are present. They should not be applied in advance, as poisons may be, to prevent the attacks of the insects. How Insects Grow. — The skin or outside coat of insects becomes very hard and will not stretch. When a growing insect has become so large as to entirely fill this coat, a new, soft coat forms underneath and the old one is shed. This process of shedding the coat is called moulting (Fig. 122). The skin is moulted several times during the life of the insect, and each time the insect becomes larger or changes in other INSECTS 223 respects. The chief changes with many insects occur in the last two moults. As insects have no bones or inside skeleton it is usually considered that the outside skin is really a skeleton. In this sense they may be said to have an outside skeleton. Muscles of the insect are attached to this skeleton;^ and sometimes the texture is very hard and horn-like. Complete and Incomplete Changes. — All insects may classified on the basis of the amount of change occurr in their structure during the last two moults. (1) Those making the least change in structure and appearance during the last two moults are said to have incomplete changes. Examples of this are the true bugs and the grasshoppers. (2) Those making very great changes in structure and out- side appearance at the times of the last two moults are said to have complete changes; this is seen in the wasps, bees, butterflies, moths, beetles, flies, and mosquitoes. Four Stages in the Life. — Insects with complete changes may be said to have four stages in their lives: (1) Egg stage, (2) larva stage, (3) pupa stage, (4) adult stage (Fig. 123). The larva is the growing stage. It is during this stage that most of the eating is done; and with some insects enough is eaten during this stage to last them through the other stages of life. Some forms of larva will consume several times their own weight of food in a single day. The pupa is the resting or sleeping stage for many insects. The larva has enclosed itself in a case of some kind; some- times it spins a silken covering called a cocoon, as in the case of the silk worm and others. During this quiet resting stage the insects go through a great many changes. The digestive organs are very much changed; wings are grown and ready to unfold; legs are present instead of mere claws or pads; compound eyes are developed; often a very different mouth is formed; antennae or feelers are grown upon the head. The pupa stage sometimes lasts over winter, and in other insects or other broods it may last only a few weeks. I bev inff^X^^ 224 PRODUCTIVE FARMING The adult emerges from the pupa case with the new set of organs just mentioned. It does not look like the larva that formed the pupa case about itself, and yet it is the same individual. When a butterfly comes from its pupa it crawls upon some object, as a plant stem, where its folded wings may FIG. 123. — The currant worm: a, adults; b, larvae in various stages of devel- opment; c, pupa; e, eggs along veins on leaf. (From Smith's "Insect Friends and Enemies.") hang downward. The wings gradually unfold or "grow" and in about twenty or thirty minutes they may be of full size and firm enough to use in carrying the insect in the air. The adult never moults and never grows any larger. Special names are given to some forms of larvae. The "larVse of butterflies and moths are called caterpillars. The l^Va of a beetle is called a grub. A maggot is the larval form of the fly. Mosquito wrigglers are really the larvae. INSECTS Nymph is a name given to the larval stage of dragon flies, stone flies, grasshoppers, and some others having incomplete life changes. EXERCISE. — Collecting Caterpillars. — Late in fall let pupils bring to school caterpillars or other larva? of several kinds which they may find. Let these be placed in boxes with wire or cloth gauze tied over them. Place in the bot- tom of the box some soil and insert in this some of the twigs with leaves for the larvae to feed upon. If the caterpillars are found on plants, that will indicate what food they pre- fer. If they form pupa cases in the cage, these may be kept in a cool place until the warm weather of spring brings them out. Or they may be induced to transform to the adult stage by bringing them into a warm room for a few weeks in February or March. EXERCISE. — Collecting Cocoons. — Cocoons and pupa may be collected during the winter months and brought to school, where the transformations may be watched. EXERCISE. — Making Glass Cages for Insects. — Let the pupils bring a few tin cans or six-inch flower pots, some large glass chimneys, such as lamp or lantern chimneys, and cloth netting. Damp soil may be kept in the pots and the chimneys placed over them with gauze tied on the top of the chimneys (Fig. 124). The cages may be used at school for insects that are to be observed by the pupils. Suitable plants may be kept fresh by inserting the stems in a small bottle of water inside the cage. Insect Enemies of Man. — Among the many kinds of insects there are those that are beneficial and pthers that are injurious. Some of the injurious insects are found attacking man himself; others his prepared food and cloth- ing; and others harass the domestic animals, or attack the crops in the field, garden, or orchard. Mosquitoes. — Mosquitoes are not only troj pests; they are worse than that, because they are carriers 226 PRODUCTIVE FARMING of the germs of human diseases. Malaria is spread by mos- quitoes, and in no other way. These malaria organisms are taken into the system of the mosquito with the blood sucked from diseased people. In the mosquito's body certain J? IG. 124. — A. An insect breeding cage, easily made. (Agricultural Education.) B. Moth and pupa cases mounted on cotton under glass. Male cecropia moth above, male polyphemus moth below. (U. S. Office of Experiment Stations). changes take place in the life of the organisms which can take place nowhere else. If the mosquitoes were extermi- nated the organisms of malaria could not thrive. When a mosquito attacks a well person some of the germs of malaria are apt to be forced into the blood of the person by the sucking mouth parts of the insect. Thus every new case of malaria is started. INSECTS 227 The remedy is easy to understand. If the ponds or pools of standing water are taken care of, the malarial mosquitoes will not be able to find suitable breeding places. These stagnant waters may be drained away, or covered with crude oil, or fish may be kept in them to feed upon the wrigglers. Barrels and other vessels of water must be emptied or covered with oil. Houses should be screened to keep out mosquitoes. It is believed that the malarial mosquitoes are never active during the day when the sun is shining, Fia. 126 FIG. 125. — Malarial mosquito wriggler at left, common at right. (Div. U. S. Dept. Agric.) FIG. 126. — Malarial mosquito below, common above. (Div. Ent., U. S. Dept. Agric.) It is not difficult to distinguish the malarial mosquitoes from the other common forms. The position of the wrigglers in the water when at rest is parallel to the surface of the water, while the resting position of the common mosquito wriggler is nearly perpendicular to the surface of the water (Fig. 125). When the adult malarial mosquito is attacking a person the body is nearly perpendicular to the surface attacked; while with the common mosquito it is nearly level with the surface (Fig. 126). Yellow fever is also spread by mosquitoes of a particular 228 PRODUCTIVE FARMING group (Fig. 127). This is a common form in the South, The bodies of the insects are striped with bands of black and white. By removing the breeding places of these insects the yellow fever disease has at times been stamped out in New Orleans and elsewhere. EXERCISE. — To Study Mosquito Wrigglers. — Put a glass of water from a rain barrel, with a few wrigglers in it, on a window sill. Cover it with a sheet of wire gauze to catch any that transform. Observe the breathing tubes that are held up to the surface of the water when the wrigglers are at rest. Flo. 127. — The yellow-fever mosquito, larva, pupa, adult. (From Smith's "Insect Friends and Enemies.") Flies. — The eggs of flies are laid in moist masses of decay- ing refuse, such as manure, dead animals, slop, and many kinds of garbage. When the eggs hatch the maggots use those materials as food and grow rapidly. Then they cover themselves with .a leather-like pupa case, from which they emerge in a few days as adult flies (Fig. 128). The time required for the eggs to develop into adult flies is only a few days. A few of the adult flies live over winter and these are the ones that start the first broods when warm weather returns. By the end of the summer the number of flies has increased enormously. INSECTS 229 Diseases of man are carried on the feet and mouth parts of house flies (Fig. 129). The swarms of flies seeking suitable places to lay their eggs visit all kinds of filthy places. Again FIG. 128. — A Tachinid fly: its eggs on body of caterpillar, larva and pupa. (From Smith's "Insect Friends and Enemies.") these same flies visit the kitchens and dining rooms in search of food. Germs of disease, as well as others, are carried from the filthy places to the food over which they crawl. House flies may well be called typhoid flies. FIG. 129. — The house fly: larva with details at right, pupa Smith's "Insect Friends and Enemies.") case at left. (From Two good remedies are easy to apply. (1) Clean up the near-by garbage heaps and filthy places where flies could breed. Sprinkle diluted carbolic acid all about such places 230 PRODUCTIVE FARMING frequently. This will help to keep flies away from there and will kill many of the germs of typhoid fever and other dis- eases which might be there. (2) Screen the kitchen and dining-room well to keep all flies away from the human food. The Clothes Moth. — These insects lay their eggs in stored furs, woollen clothing, and other such places. The young eat the garments or materials in which they find themselves, thus doing much damage (Fig. 130). The adult moths do no damage except to start new broods of young. There are several remedies. Probably the best is to keep the adult Fio. 130. — A clothes moth, with its caterpillar in and out of case. (From Smith " Insect Friends and Enemies.") moths away from the stored materials by keeping these articles securely closed up in tight boxes or moth-proof bags, in which there is some odor not agreeable to the moths. Such odors are tar, camphor, naphtha, tobacco, and red cedar. Moth-proof bags may be made of new muslin, sewed well and closely tied after articles are put in. Clothes moths have no taste for cotton goods. Articles will be well pro- tected from moths if kept in a trunk in cold storage. The low temperature prevents the development of the insects. Grain Moths. — The adult grain moth is seen flying about homes or places where corn or other grain has been stored. Its habits and its size cause it to be mistaken for the adult INSECTS 231 clothes moth. The eggs are laid on corn and the small grains. The larva eats its way into the kernels, and emerges only when it has transformed to the adult stage. When these insects are in great numbers they do much damage. Stored grain may be treated by evaporating a dish of bisulphide of carbon on top of the bin of grain. The fumes settle into the crevices and kill the insects (see Appendix). The bins should be made as close or air-tight as possible during this treatment. Corn in open cribs is seldom troubled with grain moths, except in warm climates, as the cold of winter checks their breeding. Chinch Bug. — This is a showy insect, in spite of the fact that it is less than one-fifth of an inch long, the body being nearly black and the wings white. The chinch bug is a true bug, with a sucking mouth, and has a continuous growing stage from the egg to the adult form. The insects attack wheat, corn, and other grains and grasses, sucking the sap and often destroying the crop or reducing the yield. It lives over winter in the adult stage. A single female can lay sev- eral hundred eggs which soon hatch and the numbers become very great by midsummer. After a wheat crop is killed or has ripened they hunt for other succulent crops, such as corn. As only the adults can fly, the greatest numbers have to migrate to the next field by crawling. Efforts have been successfully made to stop their march from one field to another by plowing deep furrows in which tar, kerosene, or other materials may be used to destroy the insects. It is also well to practise rotation of crops, and to plow the fields in fall in places where the chinch bugs are abundant. Potato Beetles. — The Colorado, or ten-lined, potato beetle is known well by all who raise potatoes (Fig. 131). It passes the winter in the pupa stage, and the adult, appear- ing in spring, lays clusters of yellow eggs on the under side of potato leaves early in the season. These hatch into small, soft, red grubs which eat the leaves. The best remedies 16 232 PRODUCTIVE FARMING are sprays of poison on the growing crop. Paris green or arsenate of lead is mixed with water or with Bordeaux (bor-do') mixture and sprayed on the vines two or three times at intervals of a few weeks. The Bordeaux mixture (see Appendix) is used with the poison on potatoes for several reasons. It prevents the injury to leaves by the strong poisons. It holds the poison on the plants longer. It helps to prevent the early and the late blight diseases of potatoes. d FIG. 131. — Colorado (From Smith potato beetle: a, egg; 6, larvae; c, pupa; d, adult beetles. >m Smith's "Insect Friends and Enemies.") The Codling=moth or Apple Worm. — The worst insect enemy to apple growing is the codling-moth, the larva of which is the apple worm. The markets of the cities do not w^int wormy apples. The insect which thus destroys the apple crop is shown in Fig. 132. The larva spins a nest or case in the crevices about the trunk of the tree where it lives over winter. The adult emerges in warm spring weather, and lays eggs in the blossom end of the little apple just after the petals fall from the tree (see Fig. 150 C). The larva eats its way into the fruit and feeds about the center. When INSECTS 233 fully fed, it crawls out and lets itself down co the ground by a silken thread. Later a second brood may appear, to attack the fall and winter varieties of apples, the eggs being laid on the outside of the half -grown fruits. The best remedies for the apple worm are poison sprays. These may be applied along with other sprays to prevent such diseases as apple-scab and apple-rust. Three pounds of arsenate of lead are mixed with fifty gallons of the other FIG. 132. — Codling-moth and its work: a, the injury done; b, place where was laid; e, larva; d, pupa; i cocoon; /, g adults. (From Smith's "Insect s and Enemies.") spray material and sprayed on the tree in the form of a fine mist just after the petals fall. The other spray material may be either lime-sulfur or Bordeaux mixture. The calyx cup of the apple should be open when the poison is applied. This condition is seen in Fig. 150 C, and the calyx after it has closed is shown in Fig. 150 D. The Curculio of Plums and Peaches. — This is the insect which makes certain stone-fruits wormy. The peach, plum, cherry, apricot, and others are often attacked by it. This insect is a true beetle, but it has the jaws at the end of a 234 PRODUCTIVE FARMING long snout or beak (Fig. 133). When the fruit is very small the adult beetle cuts a crescent-shaped opening in the skin with its jaws, and lays an egg in it. A grub-like larva hatches from this and burrows into the fruit, eating its way to the seed. This attack is likely to cause the peaches or plums to fall to the ground. When the larva is fully fed it leaves the fruit and forms its pupa in the ground. Apples, pears, and peaches are frequently bitten by the adult curculio and the wounds thus formed may make the fruit become deformed, as in Fig. 134. Fio. 133. — Plum-curculio: a, larva; 6, pupa; c, adult; d, beetle at work on a young plum, showing a crescent mark. (From Smith's "Economic Entomology.") It is difficult to poison the larva because it is inside the fruit. The adult insect may be poisoned by spraying while it is feeding upon buds and young leaves in the orchard before laying the eggs. Another time to poison the adult is when the fruit is being eaten to make a place for the eggs. Hogs, sheep, and poultry in the orchard, during the time the early fruits are falling, will destroy many of the curculio larvae. This will probably reduce the injury next season. Some fruit growers spread sheets or other receptacles under the trees and jar the trees to shake off the beetles before they lay their eggs. They lie quiet after being jarred off and are easily gathered up and destroyed. This should be done very INSECTS 235 early in the morning and repeated every day or two for about ^ two weeks just before the eggs are laid. V ^ Kj! Peach Tree Borer. — This insect does more injury throu jn- v out the plum and peach growing districts than any other insect. The adult is a beautiful moth, resembling a wasp in FIG. 134. 135. FIG. 134. — Peaches injured by curculio. FIG. 135. — Trunk of peach tree showing a method of keeping away peach borers. (Experiment Station, N. J.) appearance. The eggs are laid during the summer upon the bark near the surface of the ground. The little borer or grub begins eating under the bark of the trunk and becomes nearly three-fourths of an inch long by fall. A gummy for- mation indicates the presence of the borer. The watchful grower will also find saw-dust-like borings escaping in some 236 PRODUCTIVE FARMING places near the surface of the ground. Very frequently the insects work in the sap wood just below the surface of the ground. Washing the trunks with lime-sulfur in the spring and summer is tried by many growers. It will probably protect the orchard from a large per cent of the borers. The more common and more certain remedy is to dig into the trees for borers in September or October and again in April or May. This is done by digging the dirt from the trunks of Flo. 136. — The flat-head apple-borer: a, larva; b, pupa; d, adult. (From Smith's "Economic Entomology.") the trees a few inches below the ground level. After a few days dig with a knife or wire for the borers under the bark wherever the gum or borings may be seen. Grafting wax may be rubbed over these wounds, and the dirt thrown back and heaped up around the tree. Heaping up the dirt will cause the next brood to work a little higher where they can be more easily discovered. Apple Tree Borers. — There are two kinds of beetles that attack the trunk of the apple tree and eat in the wood: the flat-headed and the round-headed borer. Their work is similar, but the grubs and beetles are quite different, as shown in Figs. 136, 137. The flat-headed borer attacks a INSECTS 237 great many trees besides apple trees. The round-headed borer is a serious enemy of the apple and quince and is sometimes found in pear trees. The grubs of these borers live in the tree trunk about three years and then change to the pupa stage a few weeks before emerging as adults. The best remedy is to keep the adults from laying their eggs on the trunks. This is done by tying tar paper or wire gauze about the trunks. The bottom of the material should be slightly in the ground and the top securely tied to prevent the beetles from crawling in. These protectors FIG, 137. — Round-head apple-borer: a, larva; b, pupa; c, adult. (From Smith's "Economic Entomology.") should be renewed before the egg-laying season of June and July. Above these screens the trees should be whitewashed or sprayed with lime-sulfur. The San Jose Scale. — These insects were probably introduced into this country from China and were first found in America near the city of San Jose (Ho-sa'), California. This insect is probably the worst enemy of fruit trees. It has sucking mouth parts, and not only sucks the sap from leaves and fruit but also from the more tender branches. The breeding season of the insect lasts throughout the warm summer months, being checked only by frost. Large 238 PRODUCTIVE FARMING numbers of young are produced by a single insect, each one of which in turn begins to produce young in five or six weeks from birth. It is thus seen that where healthy insects of this species are not killed before the warm weather begins, the numbers may be so great by fall as to destroy or seriously threaten the trees of the vicinity. These scale insects thrive not only on orchard and nursery fruit trees, but are also found on hedges, some kinds of shade trees, and roadside shrubs. This makes it difficult to totally destroy the pest in any section where it has become firmly established. Remedies. — As this pest does not eat the tissues of the plant, poisonous sprays are not effective. The covering with which the insect naturally protects itself makes it a very difficult enemy to fight. A few good spray materials have now been found. Soluble oil is on the market under different trade names; in these the oil and water are caused to mix readily by use of certain chemicals. Lime-sulfur sprays are very successful in combating the San Jose scale. One application is made in winter or early spring before the buds of the trees begin to swell. Another application is sometimes made in June or July when the young, tender insects are abundant. This summer spray is made very weak to avoid danger to the leaves. The early spring spraying and also the summer spraying will be very valuable as a means of combating several dis- eases such as peach scab and apple scab, and brown rot of peaches. Thus the fighting of the San Jose scale is not, in itself, a very serious problem for the fruit grower. EXERCISE. — Insect Specimens. — Let pupils bring to school at any time insects which are injurious to plants in the home garden or elsewhere. The leaflets issued by the Bureau of Entomology at Washington will be helpful in the study of the insects thus collected. EXERCISE. — Preserving Specimens. — Insect specimens INSECTS 239 * may be killed by placing them in poison bottles for a few hours. These bottles should have wide mouths and good corks. A piece of cyanide of potassium, which is such a deadly poison that even breathing its fumes will kill insects and other animals, may be fastened in the bottle by pouring over it some wet plaster-of-Paris. A piece of the poison as large as a hickory-nut is enough for a four-ounce bottle. Let the plaster dry and then cork up the bottle. After insects have been killed they may be pinned into a cigar box, in the bottom of which has been fastened a sheet of thick corru- FIG. 138.: — A caterpillar-hunting ground beetle and its larva. (From Smith's "Insect Friends and Enemies.") gated paste-board. A good way of preserving large butter- flies, moths, and other large insects is shown in Fig. 124 B. Beneficial Insects. — Not all insects are harmful. There are indeed a great many groups that are beneficial in one way or another. The silk worm produces a product worth many millions of dollars annually in the commerce of the world. Honey bees store large quantities of honey used as human food, and also carry pollen from blossom to blossom, thus increasing the crops of fruit. The ground beetle (Fig. 138), tiger beetle, and some other insects prey upon other injurious insects and thus act as a balance in Nature's forces for the control of the enemies of man. The spotted lady-beetle (Fig. 139) destroys many thousands of the San Jose scale insects. 240 PRODUCTIVE FARMING There are certain parasitic insects living on the more injurious forms and this aids materially in the control of insect pests. (See Figs. 140, 141.) EXERCISE. — Parasites of Insects. — In the breeding cages or in the boxes where cocoons are kept, watch carefully for the indications of parasites. Some of them may be similar to one or more figures in this chapter. Toads as Insect Destroyers. — The common toad, found in the garden, lives almost entirely upon insects. He eats enormous numbers, most of which are of the harmful kinds. FIG. 139. — 15-spotted lady-beetle: a, larva; 6, pupa; d-g, adult varieties. (From Smith's "Insect Friends and Enemies.") Toads have no harmful habits. They should be protected because of the good they do. A single full-grown toad will do several dollars' worth of good in a garden each season. BIRDS AND THEIR VALUE TO AGRICULTURE. Birds are one of the most effective means of retaining the so-called " balance in Nature." That is, it may be seen that in certain seasons, or in places where insects are unusually destructive, more birds than usual will be found, busily eat- ing up the insects. Or if the weed crop is very abundant the INSECTS 241 birds will congregate in larger numbers to feast upon the seeds. Food Habits of Birds. — Through the Biological Survey of the United States Department of Agriculture, the food habits of very many species of birds have been studied and published, so that farmers, and everyone else for that mat- ter, may know exactly to what extent we are indebted to the FIG. 140. — Digger-wasp carrying a cicada to its home. FIG. 141. — Sphinx caterpillar covered with cocoons of parasites. "Insect Friends and Enemies.") (From Smith's birds for their help in keeping down the numbers of destruc- tive insects and the weed pests that would soon literally take the country, were it not for the activities of the birds. Through the studies made in the Biological Survey, which have covered a long period of years, it has been deter- mined that very few species of birds can actually be called harmful to the interests of man. Harmful Birds. — Three hawks — Cooper's hawk, the sharpshinned hawk, and the goshawk — are the three that commit the most depredations against chicken yards, and 242 PRODUCTIVE FARMING kill many other useful birds. These three should be learned and killed on sight. Other Hawks, including the red tailed hawk, red shoul- dered hawk, marsh hawk, Mississippi kite, Swainson's hawk, American rough-legged hawk, sparrow hawk and broad winged hawk, are all very useful, as their diet consists mainly of rats, mice, and other small creatures that are very destruc- tive to grain crops. Owls are also included in this list with the useful hawks. It is said that hawks work by day and owls by night, so that these birds work for the farmer twenty- four hours every day. Nothing could be more friendly and helpful than that. Farmers in turn can do no less than protect these birds. Some Robin Arithmetic. — The following paragraphs are quoted from William Rittenhouse: "A pair of robins eat two worms or insects every minute, all summer long, and also raise one or two broods of young robins to do the same. "We count that the robin starts to look for the early worm at five o'clock in the morning and keeps up his search until five in the afternoon, that makes twelve hours, or seven hundred and twenty minutes — 1,440 worms a day for the pair of birds. For at least four months the robins stay with us. Robins live about fifteen summers if their enemies — usually men or boys with guns — let them alone to do their work. So in one lifetime a pair of robins could destroy 2,592- 000 bugs and worms. "Worms and insects when not interfered with, increase at a frightful rate. One pair of potato bugs, if unmolested, will increase to 55,000,000 in a single season. But one bird in a minute, can gobble up one of these parent bugs, and thus prevent the 55,000,000 from ever existing. To keep down insect life is the robin's great occupation, and its foraging begins early in the spring. Thus it destroys the early bugs which, if let alone, would lay countless eggs and prepare endless trouble for the farmer later on. INSECTS 243 "A pair of robins are the farmer's private detectives. They guard his trees twelve hours a day. Yet some farmers object because robins eat cherries. It would pay every farmer to plant a group of cherry trees for the robins, in order to gain a band of industrious helpers all summer." It is not alone the robins that are valuable to agricultural interests. The following is a partial list of birds that are friends to man: All sparrows except the English; all swallows; siskin; kill- deer; flicker; nighthawk; grackle; pheasant; quail; grosbeak; bluebird; nut-hatch; blue jay; thrushes; wren; catbird; war- bler; meadow lark; blackbirds; oriole; cardinal; mocking bird; chickadee; all woodpeckers, and many more. What Birds Eat.— United States Farmers' Bulletin 755, "Common Birds of Southeastern United States in Relation to Agriculture/' gives a list of 66 birds which are known enemies of the cottori obll-weevil. It also says that 128 kinds of birds eat wireworms, an enemy of corn. 55 species de- stroy billbugs, another corn pest; 43 kinds feed upon army worms ; 24 kinds eat chinch bugs ; 25 kinds are especially fond of the large clover leaf hoppers. The small clover leaf wee- vils furnish food for 74 species of birds. And so on through the long list of insect enemies of farmers, gardeners and fruit raisers. It is estimated that insects damage and destroy about $700,000,000 of crops annually in the United States. Prob- ably no one has estimated or could estimate the saving to agriculture by birds feeding on insects and weed seeds. Amount of Seeds Eaten. — If those birds which eat mainly weed seeds, each consume one-half ounce of seeds daily, it is easily estimated that in a large agricultural State, such as Illinois or Iowa, the annual food supply of these birds would amount to hundreds of tons of weed seeds. Methods of Encouraging Birds. — Plant shrubbery for nesting places. Dense patches of brambles make good hid- 244 PRODUCTIVE FARMING ing places, where birds may be safe from stray cats and dogs. Plant berry-producing shrubs and vines for food. Spice bush, barberry, mulberry, blackberry, hackberry, and thorn- apple are good. Also many others. Make bird houses out of tin cans or boxes and place them where the birds will not be afraid to nest hi them. Pro- tect the trees in which nests are found, with sticky flypaper to keep off stray cats. Feed the birds in winter and furnish them drinking places in summer. Bird Enemies. — Probably the worst enemies of birds are stray cats, bird dogs, hunters, and thoughtless boys. The cats should be killed. The dogs should either be kept tied or killed. The boys should be taught to love and pro- tect the birds instead of robbing their nests and shooting the birds. Hunters should be controlled by better laws. Laws protecting birds should be more stringent. When farmers become fully aroused to the importance of birds in relation to agricultural interests, they will see to it that hunt- ing is prohibited, and that all seasons are " closed" for all game birds. They should be protected and encouraged in every way possible, as they are among the farmer's best friends and are one of the greatest assets to the successful raising of crops. Among the worst enemies of birds are bird dogs. They are bred for hunting birds and do it instinctively, so cannot be blamed. The people who keep them and allow them to run at large are the ones at fault. They are also the ones who suffer most, perhaps, as a dog will naturally roam about his master's place first, and destroy the nests of the birds which he can reach. The following birds nest on, or near, the ground: bobo- link; meadow lark; chewink; quail; pheasant; prairie chicken; Harris sparrow; lark sparrow; white throated sparrow; tree sparrow; red winged blackbird, and veery. Their nests are INSECTS 245 very liable to be broken up by prowling bird dogs, or worth- less curs, which eat the eggs. Hunters often shoot useful birds merely for the sake of killing something. Of course all the game birds which are bagged by hunters are a direct loss to the farmers, as they have just that many less friends who would help them in destroying insect and weed enemies. EXERCISE. — Count the number of cats in your school district. Estimate the loss to the farmers if each cat destroys five nests each year for five years. Let each pupil make a bird house and put it up in the school yard or at home. Report on watering places for birds in the locality, either natural or artificial. Suggest schemes for watering the birds. Have pupils observe the habits of birds and report on such things as feeding, watering, nest building materials, and nesting locations. One bird dog was known to have destroyed 21 quails' nests on one farm in one season. If each nest averaged 15 eggs, how large a flock of quails were destroyed by that one worth- less dog? Each quail would have eaten at least 100 potato bugs and at least that number of many other kinds of insects in one day. Figure out how many insects these quails might have destroyed in one season, if they had all lived. Which do you think would have been the most valuable to the farmer, the quails or the dog? REVIEW. 1. Describe the structure of insects, as to body, wings, legs, and parts on the head. 2. Tell of the two kinds of mouth parts of insects. 3. Why cannot insects that have sucking mouth parts be poisoned? How are they usually controlled? 4. Tell what you can about the skeleton of an insect. 5. Tell how insects grow. 6. Tell what Js meant by the terms complete change and incom- plete change in the development of insects. 7. Name the four stages in the life of insects hfiving complete change. 246 PRODUCTIVE FARMING 8. Tell what you can about the larval stage. 9. Tell what you can about the pupal stage. 10. To what forms of larvae do these terms apply : caterpillar, grub, maggot, wriggler, nymph? 11. Tell how mosquitoes develop malaria and impart it to man. 12. Tell two differences between malarial mosquitoes and others. 13. Tell of three more ways of preventing the spread of human diseases by mosquitoes. 14. Tell how mosquito wrigglers breathe. 15. Describe the life development of the house fly. 16. How do flies spread typhoid and other human diseases? 17. What are the remedies to be used against the fly? 18. Tell how to prevent damage from clothes moths. 19. Describe the damage done by grain moths. 20. In what ways are chinch bugs injurious? 21. What are the different means of control? 22. How are potato beetles controlled? 23. Describe the life and work of the coddling-moth. 24. Tell at just what time to spray to fight the spring brood. Why? 25. What injury is done by the curculio beetles? 26. What are some of the ways of fighting it? 27. Tell how the peach tree borer may be found. 28. What are the remedies for this insect? 29. Name two kinds of apple tree borers and tell what harm they do. 30. Why is it so difficult to control the San Jose scale? 31. What two materials are used to spray the scale? When used? 32. Name some groups of beneficial insects and tell of their benefits. 33. How do birds help farmers? 34. How have we learned what birds are our friends? 35. What three birds are actually harmful? Why? 36. What do hawks and owls eat? 37. What do most other birds eat? 38. What birds are most common in your locality? 39. What birds, if any, remain over winter? References. — U. S. Farmers' Bulletins: 127, Important Insecticides; 543, Common White Grubs; 650 and 723, Scale insects; 657. Chinch Bug; 662, Apple Tent Caterpillar; 668, Vine Borer; 675, Apple Tree Borer; 691, Grasshoppers; 701, Bagworm; 708, Leopard moth; 739, Cutworms; 725, 733, on Wireworms; 721, Rose Chafer; 731, Army Worm; 741, Alfalfa Weevil. On household pests: 626, 627, 658, 659, 679,681, 683, 699, and 740; 513, 755. Birds; 766, Cabbage Worm. CHAPTER XXI. DISEASES OF PLANTS— SPRAYING. Diseases of Plants. — There are many diseases which attack plants grown in field, garden and orchard. These are mainly: (1) Those produced by fungous growth of minute plants, on tissues of useful plants, examples of which are rust on leaves and smut on grain. (2) Those produced by bacteria, DISEASES OF PLANTS— SPRAYING 247 as in the case of pear blight and peach yellows. (3) Those due to poor drainage or poor soil or unfavorable climate; these would not be contagious. Prevention of Plant Diseases. — The spores or organisms from which the fungous diseases develop may be killed by special spray materials. These should be killed before they get into the leaves or other parts of the plants. Spraying is a means of preventing disease rather than curing it. The spray materials are made just strong enough to kill the dis- ease germs and weak enough not to harm the useful plants that are sprayed. (See Appendix for formulas of spray mixtures.) EXERCISE. — Studying Plant Diseases. — Specimens of va- rious diseases found on fruits, vegetables, trees, and other plants may be brought to school. Let the pupil name all of these possible. If there are any that seem to be serious diseases in the neighborhood at the time they may be re- ported or specimens sent to the State Agricultural Experi- ment Station of the State. Ask that Station for special bulletins telling how to control the particular disease. Brown Rot of Peaches. — This disease causes decay of the fruit and the blighting of the twigs of peaches, plums, and cherries. Fig. 142 shows the rot on peaches. The trouble with peaches is confined almost exclusively to the early varie- ties. After the rotted fruits have become dry they cling to the trees, and thus hold the spores over until the next year. Remove all such dried fruits from the trees in the winter. The sprayings made to control San Jose scale will help to keep this disease in check. Peach Scab or Black Spot. — This disease gives the fruit a sooty appearance, because of the presence of grayish black spots. The scab may become so bad as to cause the fruits to crack open. It is thought that this disease is worse in orchards where the air-drainage or ventilation is poor. Spray with the self-boiled lime-sulfur mixture, given in the 17 248 PRODUCTIVE FARMING Appendix as the 8 — 8 — 50 formula, just after the blossom calyx is shed from the young fruits (Fig. 143). Repeat this spray once or twice at intervals of three weeks. Peach Leaf Curl. — In early spring, when this disease occurs, the leaves become thickened, curled, and distorted (Fig. 144). The diseased leaves turn brown and fall off. The loss of leaves from this cause may be very severe in the worst cases. The spraying for scale insects will usually keep the leaf curl within control. Fio. 142. — Brown-rot disease of the peach. Fresh fruit above, last year's fruit clinging to twigs. (Experiment Station, N. J.) Peach Yellows. — The exact cause of this disease is not yet definitely known, although a great deal of study has been given to it. The real cause may be due to some form of bacteria, as the disease is very contagious in the peach orchard. In the earlier stages of the disease the leaves on some shoots are very abundant and small. Fig. 145 shows the appearance in spring. Wiry shoots are sent out from the main branches. The leaves may even become yellowish- green in color, and quite sticky. In advanced stages of yellows the fruit appears ripe much ahead of its time; the DISEASES OF PLANTS— SPRAYING 249 skin and flesh are spotted and blotched with red, the flavor being bitter or insipid. The best remedy is to cut out the diseased tree as soon as detected, and burn it. Disinfect instruments used to help prevent spread to healthy trees. Little=Peach. — This disease of the peach is somewhat like yellows, the leaves becoming yellowish-green and drop- ping as in yellows. But there is one important difference. Instead of appearing ripe too early, the fruits remain very small and are green much too long. (See Fig. 146.) The diseased trees should be burned as in the case of yellows. Apple Scab. — This disease of the apple is very bad in nearly all regions where the crop is grown for market. It is very similar to the scab disease found on pears. It attacks both leaves and fruit. This disease appears at blossom time and soon after, caus- ing large numbers of the small apples to drop from the tree. The fruits that cling on may be- come affected and will be small, irregular, rough, and blotched. Irregular, roughened, brown FIG. 143. — Time for first sum- mer spray on peach and plum, as the calyx is being shed from young fruit. (Experiment Station, N. J.) spots, more or less running together, are formed on the sur- face of the apple. The roughened or scabby area may cover all one side of the apple and even cause it to crack. It is from this scabby appearance that the disease takes its common name. The disease on the leaves causes sooty spots on the under side. Later these leaves become yellow and drop from the tree, in severe cases taking most of the leaves from the tree. 250 PRODUCTIVE FARMING This disease is prevented by spraying in early spring before the buds swell, with lime-sulfur preparation. This is repeated with a weaker solution just before the blossom buds open, and again just after the petals of the blossoms fall to the ground. FIG. 144. — Leaf-curl disease. Healthy twig on right, the disease prevented by lime-sulfur spray. (Experiment Station, N. J. ) EXERCISE. — Studying Apple Scab. — Have some one bring to school a few samples of scabby apples from the grocery store or home orchard. The class should all become familiar with the ways in which the fruit is affected by the scab. Apple Rust. — Leaves attacked by apple rust appear as though covered in blotches by a heavy coat of iron rust. The whole under surface may present a rusty appearance (Fig. 147). The trouble may spread to tender twigs and even to DISEASES OF PLANTS— SPRAYING 251 the fruits in some cases. The life of this disease is interesting, and a knowledge of it leads to the proper remedy. The apple rust fungus lives a portion of its life upon the apple tree or the quince tree, as already described, but it appears in a very different form upon red cedar trees that may be growing near the orchard. The growth on the cedar tree is popularly known as cedar apple. These cedar apples in spring appear as large masses of yellow or orange-colored FIG. 145. — Twigs of peach in spring-time. Two at right affected with "yellows," healthy twigs at left. (Experiment Station, N. J.) jelly clinging to the branches of the cedar tree; in winter they are small, brown or purple galls. These enlarge next spring. It is from these cedar apples that the disease spreads to the orchard. If this disease is very prevalent in the orchard, it may be best to remove the cedar trees near the orchard. This would greatly check or stamp out the disease. Spraying as for apple scab will perhaps aid a little in checking the apple rust, but is not a complete remedy. 252 PRODUCTIVE FARMING EXERCISE. — Cedar Apples. — In the fall or winter stu- dents may find specimens of the winter form of the cedar apple, above described, on the cedar trees near apple orchards. If these are found use the specimens to illustrate the lesson n apple disease. Potato Scab. — On the surface of Irish potatoes in the 'winter time may be found scabby-looking spots or areas caused by the potato scab fungus. The disease when very bad produces deep depressions or pits in the surface of the FIG. 146.— Disease called "little-peach." Healthy fruit above. (Experiment Station, N. J.) tubers. The crop yield may be greatly reduced by the attacks of this disease. The spread of the disease may be in several ways: 1. The germs of potato scab will grow more rapidly when there has been a heavy application of fresh stable manure to the field just before the potatoes are planted. It is better to manure the field one year in advance if possible, or to use some well-rotted manure. 2. When lime is applied to the soil the disease will likely be worse on the potato crop. Green manure plowed under in preparing the field for potatoes will help to counteract this action of the lime. 3. Soils from which a very scabby crop of potatoes has DISEASES OF PLANTS— SPRAYING 253 been harvested recently will probably cause the next crop to be diseased in like manner. Rotation of crops is, therefore, advisable. Do not use beets and other root crops in this rotation, as the scab disease also attacks them. 4. Seed potatoes are usually more or less scabby or have the germs of the disease upon them. If these are planted without treatment the disease will likely be introduced into the soil. The treatment of seed potatoes to prevent the planting of scab disease is now a very cheap and simple process. The FIG. 147. — Apple rust on leaf and twig. seed potatoes are soaked for two hours in a solution of forma- lin. This solution is made by mixing one pint of the strong- est formalin in thirty-two gallons of water. This kills the disease germs but does no harm to the potatoes. The liquid may be used for several sacks of potatoes. EXERCISE. — Showing Potato Scab. — Specimens of Irish potatoes having the scab disease should be brought to school and shown to all the students. Grain Smut. — In fields of grain, when it is in head, may be often seen a black powder which clings to the husks of the grain (Fig. 148). This black powder is the fruit of a disease growing inside of the grain stalks. The disease is 254 PRODUCTIVE FARMING called grain smut, for it causes the black appearance, like stove soot, on the heads of grain. Oats and barley are often very badly injured by this disease. Any farmer can prevent his grain from having the disease by a very simple and cheap process. The seed should be treated in a liquid before it is planted. The liquid used is formalin and water. If into a common barrel are poured twenty gallons of water and then one half- pint of strong formalin is thoroughly mixed with it, the liquid will be ready for use. The seed grain is placed in a loose sack and then lowered into the barrel of liquid; after about ten min- utes all of the black smut or spores in the seed will be killed. The sack is then raised up and allowed to drain for a few minutes. The wet seed is then spread out to dry before it is planted. This drying may be done on a clean barn floor, in a wagon-box, or on a cloth stack-cover spread on the ground. The seed should be spread out thin enough so that it will dry before it begins to sprout. 'The same liquid may be used for many sacks of seed, so that the cost of treating enough seed for a large field is not great. EXERCISE. — Treating Oats for Smut. — It is suggested that FIG. 148. — Loose smut of oats mounted on cotton under glass. (A. E.) DISEASES OF PLANTS— SPRAYING 255 the pupils bring some oats in a sack, and treat them in a pail of water with a little formalin in it. EXERCISE. — Showing Grain Smut. — Perhaps sample heads of diseased grain can be brought to school. If so, preserve them as shown in Fig. 148. Some one should bring samples of corn smut disease to show to the class. Corn smut is not prevented by the formalin treatment. EXERCISE. — Treating Seed Potatoes. — The pupils may bring a pail and a few potatoes from home. A half-ounce (four teaspoonfuls) of formalin should be added to one gallon FIG. 149. — Spraying orchard trees in early spring, for scale insects, with barrel pump. (Experiment Station, N.J.) of water. Soak the potatoes in this mixture for two hours. Urge the pupils to tell of the method at their homes. Spraying. — Under ordinary conditions a bearing apple orchard should be sprayed at least three times each spring and perhaps once in summer. The first spraying is to be made before the buds swell in very early spring (Fig. 149). This is to prevent scab and similar diseases and to kill the San Jose scale insects. For this spraying it is well to use either soluble oil at the rate of one gallon of the oil to fifteen gallons of water, or to use the 256 PRODUCTIVE FARMING lime-sulfur solution. Commercial concentrated lime-sulfur is diluted at the rate of one gallon to nine of water. The second spraying is made just before the blossom opens FIG. 150. — A. Too soon to spray for apple worm or codling-moth. Spray for apple scab at this stage or before. B. Apples in full bloom. Spraying now would poison the honey bees. C. Petals just fallen; just the right time to spray for apple worm. Poison will fall in the calyx cup of the blossom and kill the worm as soon as hatched. D. Too late to spray for apple worm. The calyx is closed and apples turned down. (Experiment Station, N. J.) (Fig. 150, A) . It is to control apple scab disease and to kill all leaf -eating insects. This time use one and one-half gallons of strong lime-sulfur solution and three pounds of arsenate DISEASES OF PLANTS— SPRAYING 257 of lead to fifty gallons of water. This will accomplish the two purposes at the same time. The third spring spraying is made just after the petals fall from the blossoms. Its chief purpose is to control the codling-moth. It also aids in preventing the trouble from apple scab. As there are two purposes, use the combined sprays as in the second spring spraying. Study Figs. 150 A, B, C, D together. For the control of codling-moth on fall and winter varie- ties of apples, a midsummer spraying is advisable. For this FIQ. 151. — Summer spraying by school students. (Agricultural Education.) use two pounds of arsenate of lead to fifty gallons of water. Principles of Spraying. — Always select, if possible, a bright clear day without much wind for all kinds of spraying. Do the work carefully and thoroughly. Let all parts of the plants be touched with the spray materials. Use special nozzles which throw the materials into fine mists. Learn of the latest and best nozzles and spraying apparatus by writing to the Agricultural Experiment Station of the State. Always consider what are the special purposes of the particular spraying, and use the proper materials for those purposes. 258 PRODUCTIVE FARMING • An insecticide is to be used for insects, and a fungicide used for the plant diseases. These may be combined into one spray material. Weaker sprays are necessary on plants when the leaves are on; stronger sprays when the trees are dormant. Lime-sulfur is used both as a winter spray and as a sum- mer spray, but the strength must be made to suit the condi- tion of the trees or other plants. It is a fungicide and also a special insecticide for the control of scale insects. Soluble oils are for winter use only and are especially for scale insects. Bordeaux mixture alone is a fungicide and, in different strengths, may be used either when the trees are dormant or when in leaf. Paris green and arsenate of lead are two of the most com- mon insect poison materials. They may be used in combi- nation with lime-sulfur and also with Bordeaux mixture. (See spray formulas in the Appendix.) REVIEW. 1. What are the three main causes of plant diseases? 2. Name two fungous diseases of the apple. 3. Name five diseases of the peach. 4. Describe peach yellows and tell of the best remedy. 5. Tell how to prevent apple scab. 6. Tell of the relation of cedar apples to the rust disease of apples. 7. Give four causes of potato scab and the remedy for each. 8. Describe the treatment of seed potatoes to prevent the planting of scab disease. 9. Describe the treatment of oats to prevent smut disease. 10. Give the objects for each of the three spring sprayings of apple trees. 11. Give the material to use at each time. 12. Give all the principles of spraying that you can. References. — U. S. Farmers' Bulletins: 345, Some Common Disin- fectants; 488, Diseases of Cabbage, Etc.; 507, Grain Smuts; 648, Root Knot; 742, White Pine Blister Rust. PART II. ANIMAL PRODUCTION CHAPTER XXII. IMPROVEMENT OF ANIMALS. IN man's efforts to secure for his use the best types of live stock or farm animals he has produced the various breeds of horses, cattle, sheep, swine, and poultry. He has intelli- gently selected those animals which showed a tendency to produce the desired qualities. The correct principles of breeding have been applied, somewhat as an art and some- times also as a science. It is important that we have animals suited to a definite purpose, rather than for several or all purposes. Men want horses for draft and for speed; some cows for milk, others for beef; some sheep for wool, others for mutton; some swine for bacon and lean meat, others for lard; some hens for eggs, others for meat. A Breed. — A group of animals which have special charac- teristics of habit, color, and form is called a breed. They have a tendency to transmit such characteristics without much change to their offspring. The best breed to keep is always the one best suited to the desired purpose. There are so many breeds that one may be chosen for each particular need. Laws of Breeding. — There are several laws of nature which govern in a large measure the maintenance of good breeds and the improvement of live stock. The law of heredity is one of these. It means that animals inherit from their ancestors certain forms, characteristics, qualities, habits, and tendencies. These may be either desir- able or undesirable and are frequently both. That "like produces like" is as true with animals as with plants. If 259 260 PRODUCTIVE FARMING this law were an absolute one, man would find it impossible to make any improvements in his animals by careful selection. Variation among farm animals is a natural tendency for them to differ from each other and from their parents. No two calves in the barn are alike. The pigs in a litter may look alike when young, but the attendant can soon point out differences. This tendency to vary allows stockmen to select the desired types and produce, in time, the animals desired for special purposes. EXERCISE. — Variation Among Animals. — Let pupils tell of variations in color or other marked characters among pure-bred stock such as cattle, poultry, or swine. Care should be used to bring out the law of variation. Reversion is the tendency for young animals to exhibit characters of distant ancestors, which their^own parents did not possess. Sometimes there are characters present in certain indi- vidual animals which are not like any of the animals of the breed. Such cases are called mutations or sports. Such very odd or different characters are not always transmitted by animals to their offspring. When such new characters are given to the offspring they may become fixed and give rise to a new line or strain of animals in a breed. The hornless or polled Shorthorn cattle and the polled Hereford cattle were first started from sports. Now the hornless character of those strains has become fixed. The groups may even be considered as distinct breeds. Pure=Bred Animals. — These are animals which have been bred along a certain line or within the bounds of the breed for many generations. The vulgar term full-blood should not be used to express purity of blood in an animal. The term thoroughbred is also incorrectly used in this connection. This name belongs to a breed of race-horses which originated in England. Grades are animals which are not pure bred but are part IMPROVEMENT OF ANIMALS 261 native. A high grade animal is one which is more than half pure bred. Native stock are those in which there is no certain, traceable blood of any special breed. They may be a mixture of several breeds. They are often called " Scrubs." Cross-bred animals are the result of crossing two pure- bred animals of different breeds, as a Holstein— Jersey cross in cattle, or a Plymouth Rock— Cochin cross in poultry. Pedigrees. — These are statements of the lineage or ances- tors of animals. Records are kept of all the animals of the pure breeds, if the owners care to register them. Owners of stock of a certain breed form an Association, the officers of which establish herd books in which records are kept of the animals and their offspring owned by the members. (See the sample Holstein pedigree in the Appendix.) EXERCISE. — Stock Pedigrees. — Some pupils in the school may be able to bring to the teacher a written or printed pedigree of farm animals owned by some one in the neighbor- hood. Tne value of such a complete record may then be made clear to the class, because of its local application. Bad Effects of Crossing. — It is far too common a practice for farmers to cross the stock of two breeds. Where a herd is graded up toward one breed, as Jerseys, they are then crossed with Holsteins or Shorthorns, the hope being to increase the quantity of milk. The result is usually a dis- appointment and the practice is a bad one. When there are so many good breeds of each kind of farm animals it is unwise to try to blend them by doing such crossing. Instead of a blending effect, the stockman often gets the extreme charac- teristics emphasized by close contrast in one individual. For example, the head, hairy feet and legs, and large hoofs of the Clydesdale are sometimes found on the slender body of a race-horse. The more extreme the crosses or the greater the difference in type between the breeds used in the cross, the greater will be the number of failures. The successful crosses are few. Occasionally the bad effects of a cross do PRODUCTIVE FARMING not show until the second generation. Then the disappoint- ment of the owner is emphasized, and the time lost in his failure is greater. Keeping Pure Breeds. — All stock breeders should keep pure-bred animals. Each breed has been produced because the animals are the best for some particular purpose. The breeder should determine what his purpose is and then choose the proper pure breed for that purpose. The animals of that breed are sure to be more satisfactory than any cross breeds or grades. Pure-bred animals have fixed characteristics and may be expected to come true to type. ,The superior qualities of the parents will be found in the offspring. The profit derived from pure-bred animals is usually much gr^kter than from natives or from grades. REVIEW. 1. What is meant by special purpose animals ? 2. How have these been developed ? 3. What is meant by a breed ? Which is always th£- 3 bu. 46-60 Rice, rough 1-3 bu. 43-45 •Rye 3-8 pks. 565 Soybeans 4- 6 pks. 60s Timothy 10-20 Ibs. 456 Timothy and clover mixture 10-12 Ibs. each Turnips or rape 3-5 Ibs. Vetch and grain mixture 4-5 pks. each Vetch, Augusta 3-4 pks. 606 Wheat 6-9 pks. 60 1 Pennsylvania 47 varies in a few States from 45 to 50. 2 Varies in different States from 42 to 56. 3 New Jersey 64. « Varies 28 to 33 1A. 5 A few exceptions. Problems. — 1. At the present market prices for the seeds of six of the crops sown in your section, calculate the cost of seed for ten acres of each. 2. Find the legal weights for seeds that are shown in this table to vary, and note the standard for your State. 400 APPENDIX PQ 1 1 jg 1 1 a C* • VENSWOOD FA 3ull f3? w ,S« rt ^ffl . s* o o- r: Id l«: .3 S2 cs1"1 es3! Ss <°Tf< *>?2 i'S1 ^ SgJ wj3 ^^ -S3 ^53 ^ 52 fc* -32; >fc^ ."§» -3^; .-a* ^cat^ut^aoH LI «£ f O ,ci tu| 5 o ^ J2 ^ d ^ •^ -a ec — o " 5 rig « m a u fe S 5! •0 *O . rH >, « 2 a S C D fa Value per ton of manure1 a 1 o ils £§s 1 1 Cow manure (fresh) 3.4 5.8 8.3 4.5 16.3 5.0 1.6 2.8 2.3 1.9 15.4 2.6 4.0 5.3 6.7 6.0 8.5 6.3 $39.00 42.00 46.00 80.00 $1.91 3.13 4.20 2.56 9.12 2.88 Horse manure (fresh) Sheep manure (fresh) Hog manure (fresh) Hen droppings (fresh) 1 Considering nitrogen at 20 cents, phosphoric acid at 6 cents, and potash at 4J cents per pound. TABLE XI. DISTANCES APART FOR PLANTING FRUIT. (If planted in rows each way the distances usually range in feet about as given here.) Fruit trees. Small fruits. 30-40 Blackberries . . 4i_7 \pricots 15-20 Cranberries 1 -2 Cherries 15-25 Currants • 4 -44 Oranges . . . • 25-30 Gooseberries .4 -44 15-20 Grapes 6 -12 Pears 20-30 Raspberries black . 3£-5 Pears dwarf 10-15 Raspberries red • 34^4 Plums . . . 15-20 Strawberries hedge row . .14-3 10-12 Strawberries, matted row 1 -4 27 408 APPENDIX TABLE XII. USUAL DISTANCES APART FOR PLANTING VEGETABLES. Vegetables Rows, feet apart Distance in rows, feet Plants per acre Asparagus . . 3-4 1-2 Beans, bush and pole 2-4 1 Beet early 11-2 drills Beet stock sugar H-2 thin drills Cabbage, early .... 2-2* H-2 8712-14520 Cabbage, late 3 3 4840 Carrot . . 14-2 drills Cauliflower .... 2-2£ H-2 8712-14520 Corn sweet . . 3-3$ 1-2 Celery 3-4 i-1 10890-29040 Cucumber and. melons 4-6 4-6 Esrfif olant 3 3 4840 Lettuce curly ... 1-2 thin drills Lettuce head U | 58080 Onion . ... H-2 drills Parsley .... 1-2 drills Peas 1-3 drills PeDDer 2i H 11616 Potato 2^-3 1-H Radish 1-U drills Rhubarb 4 2-4 2722-5445 Salsify u-2 drills Spinach 1-U drills Squash and pumpkin 6-8 6-8 Sweet potato 3-4 2 5445-7260 H-2 drills 3-4 3-4 2722-4840 APPENDIX 409 TABLE XIII. SUGGESTIONS TO TEACHERS FOR ADDITIONAL EXERCISES AND PROJECTS. THE following projects and field and laboratory exercises will be suggestive to those who wish to further supplement the text. These are arranged according to the numbers of the chapters to which they are most closely related. They may be taken yp in connection with their corresponding chapters if desired. CHAPTER I. PHYSIOLOGY OF PLANTS. 1. Tie a piece of bologna skin over the top of a long glass funnel tube from a chemical laboratory. Fill the bowl of the funnel with dense sugar syrup. Place it with the membrane beneath the surface in a glass of water. Then support the tube in 'some way and observe the osmosis of the two liquids. With a piece of rubber tubing splice on more glass tubing and see how high you can conduct the liquid before the action stops. CHAPTER II. PLANT IMPROVEMENT. WEEDS. 1. Make a study of a fanning mill at a dealer's or at some farm. Study the sieves and the fan. Try the machine with a quantity of uncleaned seeds and note its work. 2. Let home projects be started in the ear-row method of improving corn, and in the hill-row method of increasing the yield of potatoes. 3. Make a list of bad weeds observed at your home farm or elsewhere, seen in the following places: (1) roadsides and fence rows; (2) in grain fields; (3) hi cultivated fields; (4) in hay fields; (5) in pastures. 4. Make a list of the ways you have seen for storing seeds over winter. 410 APPENDIX CHAPTER III. PLANT PROPAGATION. 1. Pupils may start home projects in the growing of nursery trees of apple, peach, and plum trees and also grape vines. 2. Bush fruits may be propagated at home for sale to others. CHAPTER V. KINDS OF SOIL. 1. In regions where soil is quite variable, students should make lists of trees or other plants which thrive best on the different types of soil. 2. Trials of special crops may be made on different types of soil to show the value of each for certain purposes. CHAPTER VI.— SOIL MOISTURE. 1. Home projects should be started to show the effects of good and bad methods of tillage in preparing the soil and caring for some culture crops, say corn, potatoes, tomatoes, and others. CHAPTER VII. LAND DRAINAGE. 1. Let root systems be studied to prove that drainage deepens the root systems, and reduces injury from drought. 2. In springtime test the fact that drainage warms the soil. Use a thermometer or observe the early growth of plants on both drained and undrained places. 3. Home or neighborhood projects in tile drainage may be planned, surveyed, and the cost estimated. CHAPTER VIII. SOIL IMPROVEMENT. 1. Study the different types of plows, harrows, culti- vators and other tillage machinery at a dealers or on farms. 2. List all the farms hi the community that grow green manure crops. What crops are grown? Do they all find it beneficial? 3. What farms use lime for soil improvement? What APPENDIX 411 kinds are used? Which kinds are preferred? For what crops is the liming done? Does it help them? Let pupils make surveys to obtain answers to these questions. 4. Make a survey regarding the care, management, and uses of barnyard manure. 5. Make a similar survey regarding use of commercial fertilizers— kinds, grades, prices, for what crops, benefits, home mixing, ingredients purchased. 6. Start home projects to prove the benefits of liming, use of barnyard manure, commercial fertilizers. CHAPTER IX. SYSTEMS OF CROPPING. 1. Make a survey to determine what rotations in crop- ping are practiced in the community. What are the best ones? 2. Long projects in crop rotations, may be started in connection with those in the preceding chapter. CHAPTER X. FARM CROPS. 1. Determine how many of the different classes of crops enumerated at the first of this chapter are grown in the community. Which are important crops? which minor crops? 2. What farmers are using the soiling crop system, wholly or partially, in the summer season? 3. Start projects with pigs, cows, or calves, to compare the expense and value of soiling systems and pastures, and perhaps summer silage. 4. Start projects in the growth of crops that should be encouraged hi the region. 5. Start projects in pasture improvement using methods suggested at the last of the chapter. CHAPTER XI. ALFALFA. 1. Let pupils make surveys among the farmers to deter- mine how many of the alfalfa rules are followed. 2. Start alfalfa projects to bring out the most important 412 APPENDIX ones of these — liming, inoculation, frequent cutting. In- clude also the harrowing of stubble after cutting to keep down weeds and conserve moisture. CHAPTER XII. COTTON PRODUCTION. 1. In cotton sections, students should make surveys showing varieties grown, soil preparation, tillage methods, damage from insects and diseases, time of picking, yields, methods of marketing, and cropping systems. 2. Cotton growing projects may be started with records to be kept along all of these lines and including the cost of the crop. The combating of the boll-weevil and other enemies should be planned in these projects. CHAPTER XIII. CORN. 1. Corn growing projects, when started, should be planned to include all the essential points in growing the crop. Records of time, cost, yield, etc., should be kept. CHAPTER XIV. SMALL GRAINS. 1. Mount all the different types of grain obtainable, using the methods described in this chapter. 2. Let some pupils grow rice, flax, or any other grain crops that are not well known in the region. Have students study these. CHAPTER XV. POTATOES. 1. Let pupils combine in making a survey of th? commu- nity on Irish potatoes or sweet potatoes or both. Determine varieties, soil maintenance, preparation of soil, planting rotations, cost of crops, methods of combating insects and diseases, yields, methods of marketing, storage, etc. 2. Home projects with a small area of either of these crops should be started. Let competitions be started in yield, quality, and cost. APPENDIX 413 CHAPTER XVI. TOBACCO FOR MARKET. 1. If tobacco is a market crop of the region, divide the list of growers among the pupils and make a survey to deter- mine methods of preparing soil, starting plants, transplanting, tillage, fighting insects and diseases, suckering and topping, harvesting, curing, sorting, packing, storing, marketing, etc. CHAPTER XVII. FORESTRY. 1. Let pupils see how many of the forest influences men- tioned can be discovered in the region. 2. Study the trees of the region and make a list of all. Learn to know them at sight. 3. Home projects may be conducted with forest tree nurseries. CHAPTER XVIII. GARDENING. 1. Several plans for home gardens should be drawn by each student. These may be compared and discussed. 2. A garden survey of the region may be made to deter- mine a number of points: (1) How nearly the home is supplied with winter and summer vegetables; (2) what crops are grown for market; (3) what crops are not grown that should be grown; (4) manuring or other fertilizing practiced; (5) succession cropping plans; (G) companion cropping plans; (7) leading varieties of the main crops; (8) methods used in preventing damage from insects and diseases; (9) methods of harvesting; (10) methods of marketing; (11) methods of curing, drying, and storing; (12) what seeds are saved for future planting, and how. 3. There are many home garden projects that can be pursued by both boys and girls. CHAPTER XIX. FRUIT PRODUCTION. 1. Practice pruning of orchard trees for a few growers. 2. Make a survey of the varieties of fruits that succeed well in the region. 414 APPENDIX 3. Have exercises in grading and packing fruit. 4. Study methods of storing and of marketing as practiced in the region. CHAPTER XX. INSECTS. 1. Observe and report damage- from insect enemies. 2. Report examples of birds feeding their young on insect larvae. 3. Report damage to birds' nests by cats, dogs, and other enemies of our bird friends. CHAPTER XXI. DISEASES OF PLANTS. 1. Make up a number of the spray mixtures and use them on nearby trees as needed. 2. By means of a rapid survey calculate the loss from each of the worst plant diseases of the region. CHAPTER XXII. IMPROVEMENT OF ANIMALS. 1. Report observations of the bad effects of crossing. 2. Report examples of the money values of pure bred stock as compared to scrubs. 3. Have pupils bring hi examples of variation in poultry, pigs, etc. CHAPTER XXIII. HORSES. 1. Students should visit the stables of a veterinarian in a group. He will be glad to show cases of sickness or injury of horses in his care. He can show you specimens and give lessons on teeth, horses' feet, etc. 2. Get a good horseman in the district to demonstrate with light and heavy horses the good and poor points of each individual. CHAPTER XXIV CATTLE. 1. Students should be taken to a farm where beef cattle are found. Practice picking the best and the poorest for the type, both as feeding for beef or as breeding animals. APPENDIX 415 2. Similar trips should be taken for the study of dairy animals. 3. Make a list of all the breeds of cattle in the region, either grade or pure-bred. Determine for what purpose they are each kept. 4. If possible arrange with some parents or with some bank to finance home projects in calf raising. CHAPTER XXV — SHEEP. 1. Ascertain by a student survey what breeds of sheep are found in the region. Let comparisons of these be made. 2. Make a list of all the families hi the district that keep dogs, and the number for each family. How many of these are known to worry or to kill sheep? Does this influence the sheep industry? 3. Sheep feeding experiments may be started as home projects. CHAPTER XXVI SWINE. 1. Enumerate the number of swine of each breed repre- sented in the district. Which are most popular? Which make the most rapid gains in weight up to six months of age? Or which ones reach the weight of 100 pounds first? 2. Home projects in management and feeding of pigs should be started if possible. Establish competitions among the members of a pig club for the district. CHAPTER XXVII POULTRY MANAGEMENT. 1. Start contests in the hatching of chicks at home by the natural method or by incubators. 2. Let students draw plans for the construction of chick brooders and then make them at home or at school. 3. Contests may be started in the preservation of eggs. 4. A poultry exhibit and fair may be held at one of the homes or at school if a suitable place is available. This may be on Saturday. Contests in judging may be conducted in this connection. 416 APPENDIX CHAPTER XXVIII BEE-KEEPING. 1. Make a census of all the colonies in the district. What is the honey output of each place for one season? 2. If only a few bees are found hi the district calculate the loss to the district, supposing that each farmer could easily keep twenty-five colonies. 3. Ascertain the returns from comb honey and from extracted honey. Compare these methods in yields and money value. Which is most followed in the district? Why? 4. Make a list of the chief honey plants in the district — early, medium, and late. CHAPTER XXIX FEEDS AND FEEDING. 1. Make up a complete list of stock feeds grown hi the district. Classify them as concentrates, roughage, root crops, and others. Determine if possible what quantity of each is raised, and their market values. 2. What kinds and amounts of concentrates and hay are purchased from town by feeders in the district? What is the cause of this? Is there any good reason for the purchase of feeds that could be raised on the farms? 3. Make a list of the pasture crops grown in the district. CHAPTER XXX CATTLE PRODUCTS. 1. Home projects in the weighing, sampling, and testing of milk should be carried on by students. 2. Let students compare the methods of churning they have observed at home and elsewhere with those given in this chapter. Give reasons for differences. 3. If cream separators are found in the district, let students inquire regarding their success or failure; then see if they can aid in solving the troubles if any are found? APPENDIX 417 CHAPTER XXXI THE BUSINESS OF FARMING. 1. Make a survey of the farms in the district to deter- mine to what extent the losses mentioned in this chapter are found. 2. Make a list of farms where careful accounts of cost of production are kept. Why do not all keep such accounts? 3. Make a list of young men who have left their farms in the last few years and those who are now considering doing so. What reasons can be assigned for this? CHAPTER XXXII ROAD CONSTRUCTION AND MAINTENANCE 1. Determine the kinds and amount of private work done by farmers or others to help maintain or improve the public roads along their places. How many use road drags on their own roads? 2. Make a list of farms in the district where there are convenient and suitable rooms or buildings for use as work- shops. 3. Make a survey to determine how many large field machines are bought each year in the district; also how long these last on the farms. Get some data regarding the cost of repairs for these machines. 4. Boys should carry on home projects in the paint- ing, repair, and maintenance of the farm machinery for several months. 5. Exercises should be conducted in the over-hauling of farm engines; installing of belt machines and power; using concrete on the farm; structure of gates, poultry houses, feeding, etc. INDEX Abbreviations, Preface, 395 Aberdeen Angus, 281, 282 Accounts, keeping, 364 to keep, 365 Adults of insects, 221, 223, 224 yEolian soil, 51 Agricultural experiment station, 394 Agriculture, teaching of, 1 Air for germination, 17 forming soil, 45, 46 in soil, 17 Airing milk, 350 Alfalfa as green feed, 111 a soil improver, 111 a chapter on, 111 curing of, 114 cutting, 113, 116 for soiling, 99 inoculation for, 112, 116 in rotation, 94 loading, 114 raking, 115 roots with nodules, 113 rules for, 115 seeding, 112, 116 stacking. 115 Alluvial soil, 47, 50 American Merinos, 297 saddle horse, 268, 270 trotter, 268, 269 Ammonia, sulfate of, 84 Analysis of feeds, 330 Animal production, section on, 259 products, section on, 344 Animals as soil formers, 45, 50 composition of, 327 improvement of, 259 Antennas of insects, 220 Annual denned, 20 weeds, 28 Appendages of insects, 220 Appendix tables, 391 Apple borer, flat head, 235 round head, 237 budding, 37 root grafts, 36 rust, 250, 251, 253 scab, 249, 250 and rust, 233 spraying for, 256, 257, 258 scions, 35, 37 stocks, 35 varieties, 213 worm. 232. 233 Apples picked from ladders, 218 propagation of, 35 studying. 214 Aquarium, 13, 14 Arbor Day planting, 188 Arithmetical problems, see Problems Arsenate of lead, 258 Ashes and sour soil, 78 plant food in, 78 Ayrshire cattle, 288, 289 Babcock test, 355 principles of, 356, 357 outfit, 357 Bacon type of swine, 301, 302, 303 Bacteria in milk, 347 Bailey, Dr. L. H., quoted, 204 Balance in Nature, 13 Balanced rations, 340 Barley, 158 Barn, a clean, 348, 3~49 bad construction of, 348 good construction of, 348 manures, value of, 408 Barns, ventilation of, 349, 350 Barnyard manure, see Manure Bean weevil, 221 Bee colony, 323 hives, 323. 325 -keeping, chapter on, 321 studies, 326 structure, 324 Beef breeds, 279 cattle, fattening, 337 cuts of, 344, 345 Bees and insects carry pollen, 18, 19 life of, 323 winter care of, 326 Beet pulp, 336 Belgian horse, 266 Beneficial insects, 239 Berkshire swine, 301, 302 Berries, fertilizer for, 404 Biennial defined, 20 weeds, 29 Birds as insect eaters, 240 beneficial hawks, 242 chapter on, 240 encouraging, 243 enemies of, 244 food habits of, 241 food of, 243 harmful, 241 houses, 244 laws protecting, 244 seeds eaten by. 243 Bi-sulfide of carbon, 231 Biting insects, 220 sprays for, 395 Black Minorca pair, 307 spot of peach, 247 Blackberries, 216, 217 Blake's, Prof. M. A., list of peaches, 212 Blossoms, see Flower Bone, ground, 84 Books, reference, 60, 391 419 420 INDEX Bordeaux mixture, 233, 258,395, 396 Bottling milk and cream, 351 Boys' and girls' clubs, 6 Brahma hen, 308 Bran, 335 Breed defined, 259 Breeding, laws of, 259 Breeds, beef, 279 keeping pure, 259 of bees, 322 of horses, 263 sheep, 293, 294, 296 swine, 301. 302, 304 Brewers' grains, 336 Brooder houses, 320 Brown rot of peach, 247, 248 Swiss cattle, 284, 285 Budding apple trees, 37 peaches and plums, 38, 39, 40 sticks, 37, 39 Bud selection, 23 Buds, fruit, 210, 212 Bulletins, Farmers', how to secure 3, 390 how to use, 3 referred to, see end of each chapter Bushel measure, 401 Business of farming, 360 success, elements of, 363 Buttermilk, 353, 354, 356, 359 Butts of corn, 137 Buying feeds, 342 By-products and mill feeds, 335, 337 Cab horses, 266 Cables, how made. 376 Calf feeding, 337 iCalifornia, school gardening in, 192 Calves, dairy, 285 feed for. 406 Cambium layer of wood, 36 Capillary moisture, 60-64 experiment, 64 Carbohydrates, 329 and fat in feeds, 405 Carbon bi-sulfide, 231, 400 dioxide, 13, 14 in plants, 13, 14 Carniolan bees, 322 Casein of milk, 345 Catalo hybrid cattle, 282 Catch crops, 90, 91 Caterpillar-hunting beetle, 239 Caterpillars, 224, 225 Cattle, chapter on, 279 feed for, 406 judging. 289, 290 points of, shown, 289 products, chapter on, 344 types of, 279 Caucasian bees. 322 Cedar apple, 251. 252 Cellulose, 329 Cereal crops, 97 Certified milk, 352 Changes in insects, 223 Cheese-making, 355 Chester white swine, 201, 302 Cheviot sheep, 294, 295, 296 Chick creep, 388 Chicken houses, 310, 312 inside of, 311 location of, 311 plan for, 312 varieties, study of, 309 to keep, 309 Chickens, varieties of, 306-309 Chinch bug, 231 Chlorophyl, 11, 12 Cholera, hog, 304 Churning, steps in, 354 Cicada captured, 241 Clayey soil, 52, 53, 54, 58, 59, 63 Cleaning seed, 22 Cleveland Bay horses, 266 Clothes moth, 230 Clover, alsike, 106 compared with standard, 340, 341 crimson, 91, 106 for soiling, 99 in rotation, 92, 93 methods of starting, 107 nodules, 103, 104 red, 106 when to cut. 107 white, 106 Clubs, corn, 151, 152 Clydesdales, 265 Coach horses described, 266 Coarse wooled sheep, 293 Cob of corn, 13'J Cocoon, 223, 225 Codling-moth, 232, 233 spraying for, 256, 257, 258 Cold frame, 194, 195, 196 Colluvial soil, 51 Colony of bees, 323 Column system of accounts, 364, 365 Commercial fertilizers, 83 Community centre, 6 Composition of animals, 327 corn, 331 feeds, 406 fertilizers, 402, 404 manures, 407 milk, 345, 346, 347 Composts of manure, 82, 83 Concentrated feeds, 332, 334, 335. 336 Concrete roads, 372 Condensed milk, 352 Contrasts in farming, 361 Cooling milk, 350 Copper sulfate. 400 Coppice growth of trees, 189 Corn after oats and peas, 96 as feed, 334 butts, 137 chapter on, 133 clubs, 150, 151, 152 cob, 135 composition of, 331 crop, 133 INDEX 421 Corn culture, 143 distances for planting, 144 -drying rack, 147 ensilage most aconomical, 149 fertilizer for, 402 festival, 153 finest in the world, 139 for forage, 96 for soiling, 100, 101 germs, weak and healthy, 142 grain, 135 harvesting, 146, 147, 148, 149 importance of, 133 in rotation, 92, 93 in United States, 133 keeping notes, 152 kernels, 134, 137 methods of planting, 144 new standard for, 150, 151 origin of, 133 planting, 144 dates for, 145 pollinati9n of, 19 preparation of soil for, 143 proportion of, to cob, 139 report hlanks, 152 root system, 146 rules for selecting and judg- ing, 135 score card, 140 silks, 19 silos, 149 size of ears, 137, 138 soil and fertilizers, 143 stalks as feed, 332 storing, 146, 150 testing, 140, 141 tillage, 145 tips, 136 types of, 133, 134, 135. vitality of, 136 Cornbelt States, 133 Correlation of subjects, 4 Cotswolds, 293, 294 Cotton, chapter on, 117 cultivation, 124 diseases, 128 fertilizers. 123 fibers, 118, 120 gin. 126, 127 harvesting, 124 importance of, 117 improvement of, 121 insects, 128-132 market grades of, 126 planting, 123 problem, 125 range of, 121 relatives of, 119 Sea Island. 119 selecting, 121 soil, 122 types, 119 upland, 119 uses, 117 Cottonseed meal, 336 Cover crop for orchards, 211 Cow peas, 92, 99, 104 mixtures, 105 Creaming, methods of, 353 Cream, ripening, 353 separators, 354 testing, 359 Cropping, companion, 96, 196 double, 9«, 195 succession, 95, 196 systems of, 88, 89 Crop, the fruit, 218 Crops, catch, 90, 91 classification of, 97 cover, in orchard, 92 planting, 362 rotation of, 88, 89, 194 soiling, 99 Cross-bred animals, 261 Crossing, bad effects of, 261 Cultivating, effects of, 64, 65 peach trees, 73 Cultivation of potatoes, 168 sweet potatoes, 173 Cultivators illustrated, 65 Culture of corn, 143 orchards, 211, 213 Curculio of plums and peaches, 233. • 234 injuries of, 235 Currant worms, 224 Currants, 216, 217 Cutting seed potatoes, 166 Cuttings, kinds of, 42, 43 Cyprian bees, 322 Dairy breeds, 285, 289 calves. 285 farm rotations, 92 products, 344 records, 355, 356 Delaine Merinos, 297 Dent corn, 133, 134 Depth of planting seed, 193 Devon cattle, 283 Digestibility, influence on, 338 of feed, 405 Diseases of man, 229 plants, chapter on, 246 trees, 184, 185 vegetables, 408 Division of plants, 42 Dorset sheep, 294, 295, 296 Draft horses, 263, 266 Drainage, chapter on. 67 defects of, 64, 68, 69 for alfa^a, 113, 116 methods of, 67 warms the soil, 69 where needed, 69 Drains, reasons for, 67 ventilate the soil, 69 Drain tiles, 68, 70, 71 Drift soil, 50, 51 Drill, grain, 156 Drinking fountains, 313, 315, 319 Dry mashes for chickens, 315 matter shown, 327 in feeds, 405 Dual-purpose cattle. 282, 283, 284 horses, 263 Durham, see Shorthorn 422 INDEX Duroc-Jersey swine, 301, 302 Dust boxes for hens, 313 mulch, 65, 66 Ear-row method, 23 Earth roads, 373 Egg breeds, 306, 307 packing, 318, 319 problems, 220 records, 307 testing, 319 Eggs, preserving, 320 weight of, 318 yolk of, 317 English shire horses, 265 Ensilage, 147, 148, 333 Essentials in feeds, 328 Evergreens, how to use, 204, 205 Exercise, frequent in all chapters, see special topics, 409 referred to, 5 Experiment stations, list of, 393, 394 Experiment for school gardens, 200, 201, 202 Eyes of insects, 220 Fallow, bare, 90 Fanning grain, 22 Farm accounts, 364, 365 choice in buying, 369 crops, chapter on, 97, 411 equipment, repair of, 383 forest planting, 181, 182 getting started on, 368 going in debt, 369 management, section on, 360 mapping the, 362 need for better management, 367 renting plan, 368 school, plan of, 194 stepping stone, a, 368 the value of, 367 Farmer, a salesman, 365 Farmers' bulletins, see Bulletins Farming, best men needed in, 361 causes for changes in, 360 changes in, 360 contrasts, 361 results of changes in, 361 special and general, 88 system in, 362 Fat in feeds, 330 Fats in milk, 345 Feed, for pigs, 303, 304 related to purpose, 338 succulent, 316, 317 troughs for poultry, 313, 314 Feeding beef cattle, 337 for winter eggs, 315 of insects, 220 plants, 83 principles of, 337 standards, 339, 406 Feeding, systems for poultry, 314, 315 young animals, 339 Feeds, analysis of, 330 and feeding, 327, 416 Feeds, buying, 342 change to tissue, 331 digestibility, table of, 405 essentials in, 328 fertility in, 405 list of, 405 Fermented milk, 353 Fertility in feeds, table of, 405 Fertilizer equivalents, 404 formulas, 402, 404 in feeds, 342 Fertilizers, collection of, 80 commercial, 83-87 for corn, 143 for pastures, 109 for special crops, 402, 404 high grade, 85, 86 low grade, 85, 86 problems on, 87 value of, 85 Fibre crops, 97 Field records, 365 Fillers in orchards, 212 Film moisture in soils, 60, 61 Fine wooled sheep, 293, 296, 297 Flax, fibre, 159, 160, 161 growing, 160 harvesting, 160 where grown, 160 Flies carry disease, 229 life of, 228, 229 remedies for, 229, 230 trap for, 387 Flight of insects, 220 Flint corn, 100, 101, 133 Floats, 84 Flowers, imperfect, 18 of strawberry, 18 parts of, 19 perfect, 17 pollination of, 18, 19 purpose of, 17 Food value of milk. 345 Forage crops, 97, 98 for midsummer, 101 Forest care and management, 189 influences, 179, 180, 181 planting, 178-182 trees, distances. 184. 186 mixed plantings, 185 nurseries, 183 propagation of, 182 shade, 183 Forestry, chapter on, 178, 413 Formalin for grain, 254 potatoes, 253 Fountains, drinking, 313, 315 Free water in soils. 60, 61, 62 French coach horses, 266, 267 Merinos, 297 Frost and rainfall, 197 vegetables injured by, 193 Fruit buds, 210, 212 crop, care of, 218 crops, 98 planting, distances for, 407 production, chapter on, 206, 413 trees, raising of, 35 Fruits small, 216 INDEX 423 Full-blood, see Pure-bred Fungicides, 258, 395 Gallon measure, 402 Galloway cattle, 281 Gang plow, 74 Garden crops, 97 marker, 387 planning, 191, 192 plants, setting, 193, 194 Gardening, chapter on, 191, 413 landscape, 202 ornamental, 202 school, 198-202 success in, 191 vegetable, 191 Gate latch, 387 German coach horses, 267 black bees, 322 General-purpose chickens, 306, 308 horses, 26'3 Ginseng, shelter for, 183 Glaciers as soil formers, 49, 50 Gluten meal, 335 Good roads, 371 Gooseberries, 216, 217 Grades defined, 260 high, 261 Grafting, cleft, 40, 41 wax, making, 37 Grain, drill, 156 heads of, 161 moth, 230, 231 remedy for, 231 samples of, 159 sifting and fanning, 22 small, 154 smut, 253, 254, 255 Grapes, 216, 217 Grass seed, good and poor, 25 Grasses for soiling, 99 Gravel, 59, 63 Green crops as manures, 75 forage crops, 332 manure, 56 benefits of, 76 for potatoes, 164 planning for, 76 plowing under, 72 use of, 76 Grit boxes, 313 Ground beetle, 239 Grub of beetle, 224 Guard cells, 12 Guernseys, 286, 287 Hackney horses, 267 Halter, rope, 382 Hampshire sheep, 294, 295 swine, 302 Hardy vegetables, 193 Harrowing, effect of, 64, 65 pastures, 109 Harrow, spike-toothed, 66 Harvesting corn, 145, 146, 147 grain, 156, 157, 158 potatoes, 170, 171 sweet potatoes, 173 Hawks, 241, 242 Hay as feed, 332 Hay caps for alfalfa, 114 fertilizers for, 405 in rotation, 93 measure of, 401 Hayrack lifter, 385 Hay-stacking machine, 115 Heading, see Pruning Hedge-row system, 214, 215 Henry, W. A., credit given, 406 Heredity, law of, 259 Herefords, 280, 281, 289 Highways in United States, 371 Hill-row method, 214, 215 Hives, 323, 325 Hog cholera, 304 Holstein-Friesians, 286, 288 Holstein, pedigree of, 400 Home plot for school garden, 202 Honey-bees, 239 poisoning, 256 -making, 323 Hoppers for chickens, 313, 314 Horses, age of, 273 care of, 271 chapter on, 262, 414 examining in barn, 271, 272 feed for, 406 inspecting, 271, 272 judging, 274 measurements of, 273 origin of, in America, 262 points of, shown 274 pure breeds of, 263 types of, 263 unsoundness of, 273 Horticultural crops, 97 Horticulture defined, 191 Hot-bed, 194, 195, 196, 199 for sweet potatoes, 172 plants from, 173 Houdon chicks, 310 House fly, 332, 333 for chickens, 310 for pigs, 304 Humus, 55, 58, 59, 63 Husking and shredding machines, 147 Hygroscopic moisture, 60, 61 Improvement, kinds of, 72 of animals, 259, 414 of soils, 71, 410 Impurities of seeds, 28 Incubator, running an, 317, 318 Inoculation of soils, 112 Insecticides, 220, 221, 258, 395 Insects, beneficial, 239 breathing of. 222 cages for, 225, 226 changes of, 223 chapter on, 220, 414 enemies, 225 feeding of, 220 growth of, 222, 223 moulting of, 222 mounting of, 226 skeleton of, 223 specimens of, 238 structure of, 220 Inventory, an, 366, 367 424 INDEX Iodine test for starch, 13 Irrigation of the garden, 192 Italian bees, 322 Jersey cattle, 285, 287 Journal ruling for records, 365 Judging corn, rules for, 134, 139 cattle, 291, 292 horses, 275, 277 sheep, 299 Kaffir for soiling, 100, 102 Keeping farm accounts, 364, 365 Kernels of corn, 134, 137 Kerosene emulsions, 222, 395, 396 Kinds of forest trees, 182, 183, 189, 190 King system of ventilation, 349, 350 Ladders used in picking fruit, 218 Lady-beetle, 239, 240 Lambs, winter or hot-house, 192 Land drainage, chapter on, 67, 410 measuring, 401 Landscape gardening, 202 Lard type of swine, 301 Larva of insects, 221, 223, 224 Lattice shade for nurseries, 183 Laws of breeding, 259 protecting birds, 244 Layering, tip, mound, vine, 41 Leaf curl of peach, 248, 250 skin of, 11 structure, 10 Lean type of swine, 301, 302 Leaves, chlorophyl in, 11 moisture from, 10, 11 of plants, 10 openings in, 11 stomates in, 11, 12 Legal milk, 352 weights of grain, 399 Leghorn hen, 306 Legumes denned, 102, 193 gather nitrogen, 103 learning, 103 Leicester sheep, 293 Lens, use of, in examining seeds, 24 Life, duration of, 20 of insects, 223 Light horses, 263, 267, 268 see Sunlif/ht Lime and sour soil, 78 and scab, 252 benefits of, 77 for pastures, 109 Lime in soil, 55, 58, 59 slacking, 77 sulfur, 247, 250. 256, 258 forms of, 397, 398 water, 77 Liming for alfalfa, 112, 116 Lincoln sheep, 294 Linseed meal. 336 Little-peach diseases, 249, 252 Loam, 52, 54, 56, 58, 59, 63 Loose smut of oats. 254 Loss from feeds, 331 Macadam roads, 372 Maggot of fly, 234 Malaria mosquitoes, 226, 227 Manure and scab, 235 care of, 80 composition of, 408 composts, 82 for pastures, 109 green, .55, 72, 75, 76 heating of, 79 leaching of, 79 loss in, 79 spreading, 80, 81, 82 using, 81 VcJue of, 78, 79 Mapping the farm, 362 school grounds, 363 Market, fruit ready for, 218 garden crops, 97 milk, form of, 351, 352 Marl, 52 Masses of trees and shrubs, 203, 204, 205 Matted row system, 214, 215 Measure, cubic, and land, 401 of a pound of fsed, 405 Meat breeds of chickens, 306, 308 Men needed in farming, 361 Merino sheep, 296, 297 Metamorphosis, see Changes Middlings of wheat, 335 Milk as food, 344 bacteria in, 347 bad flavor in, 347 composition of, 345 fats in, 345 minerals in, 346 pails, 349, 350 pure, 348 . showing difference in, 346 sugar in, 346 varies naturally, 346 Millets for soiling, 99 Mill feeds, 335 Mineral matter, 330 in milk, 346 plants, 16 Mixed planting, reasons for, 185 Modern agricultural teachings, 368 Modified milk, 353 Moisture increasing in soil, 64 saving in soil, 64, 65 used by plants, 62 Morgan horse, 270 Mosquitoes, 224, 225 malaria. 226, 227 yellow fever. 227, 228 Moth, clothes, 230 grain, 230, 231 MouMboards, forms of, 74 Moulting of insects. 222 Mouth parts of insects, 220 Movement of moisture, 62 Mowing pastures, 109, 110 Muck, 55 Mulch, effect of, 65 dust, 65 Mules, classes of, 268 Mutations defined, 260 INDEX 425 Native stock, 261 Nitrate of soda, 84, 86, 402, 404 Nitrogen, 402. 404 fertil zers, 83 in feeds, 405 manures, 407 Nodules on legumes, 103, 104 studying, 113 Nozzles for spraying, 357 Nutrients, 332 Nutritive ratios, 340 Nymph stage of insects, 225 Oat smut, treatment, 254, 255 Oats, 156, 157, 158 and grain ^or soiling, 101 hay* 100 for peas, 99, 100 in rotation, 95 as feed, 335 fertilizers for, 402 in rotation, 92, 93 Oil meal, 336 presence of, 330 Olericulture defined, 191 Ornamental chickens. 306, 309 gardening, 202, 203 planting, 188 Orchard cover crops, 92, 211 culture, 211, 213 site and soils, 206, 207 trees, pruning, 207, 208 setting, 207 when to plant, 207 Osmosis defined, 14 use of, 14 with egg, 15 with potato, 15 Owls, 342 Oxford sheep, 294, 295 Oxygen in plants, 13, 14 and air, 16, 17 Pageants, 7 Palatnbllity of feed, 341, 342 Parasites of insects, 240 Paris green, 258, 395 Pasture, in rotation, 93 plants, 108 system, 101 Pastures, bad conditions in, 109 how to keep, 109, 110 permanent, 108 Peach culture, 211 leaf curl, 248, 250 scab, 247 tree borer, 235 varieties, 212, 213 yellows, 247, 248, 251 Peaches injured by curculio, 235 Pea root nodules, 104 Peaty soil, 52, 55, 59, 63 Pedigree, sample, 400 Pedigrees, 261 Percherons, 264 Perennial weeds, 30 Perennials defined, 20 place for, in garden, 192 Perfect strawberries, 216 Permanent pastures, 108 Phosphate rock, 84 Phosphoric acid, 402, 404 fertilizers, 84, 85 in feeds, 405 in manures, 407 Phosphorus, study of, 85 Picking and packing fruit, 218 bag for fruit, 387 Pig management, 302, 303 Pipe wrench, 387 Pistillate strawberries, 216 Plan for farm school, 194 school grounds, 198 Planning crops, 362 Plans for planting shrubs, 204, 205 Plant diseases, 246, 247 prevention of, 247 studying, 247 food in soil*. 15, 58, 59 improvement, chapter on, 22, 409 Planting corn, 144 experiment, 144 distances for fruits, 408 vegetables, 408 methods of, 181, 188 mixed, for trees, 185 need of, 179, 181 on the farm, 181 ornamentals, directions for, 205 potatoes, 167 principles of, 203 time of, 192 trees, 179, 180, 181 vegetables, 193 Plants and moistures, 10, 11 as soil formers, 45, 48 breathing of, 12 division of, 42 feeding of, 83 flowers of, 8, 17 for pasture, 108 get 'food from air, 12 leaves of, 8, 10 mineral matter in, 10, 11, 14 needs of, 16 parts of, 8 per acre for vegetables, 408 roots of, 8 stems of, 8, 9 water used by, 62 Plowing, depth of, 64, 75 fall, 74 for potatoes, 164 objects of, 72, 73 Plows, form of, 73, 74 gang, 74 Plum curculio. 233, _34 Plymouth Rock hen, 308, 309 Poison for insects, 395 Poland China swine, 301, 302 Polled Angus, 281 cattle, origin of, 260 Durhams, 280 Pollen, how carried, 18 Pollination, cro&s, 19 of corn, 19 self, 19 Pony breeds, 263 426 INDEX Pore spaces in soil, 62 Potash, 402, 403 fertilizers, 85 in feeds, 404 manures, 404 muriate of, 85 sulfate of, 85 Potato beetle, 231, 232 diggers, 171 harvesting, 170, 171 scab, 252, 253 Potatoes, chapter on, 162, 412 blight, 169, 170 cultivation of, 168 diseases, 169, 170 fertilizer for, 164 crops, 167 importance, 160 insects, 168, 169 Irish, 162 origin and types, 162, 163 planting, 167, 168 plowing, 164 score card, 166 second crop, 167 seed, 164, 165, 166 soil, 163 spraying, 169 treatment for scab, 255 varieties, 165, 166, 168 weights and. yields, 171 Poultry, care of, 316 chapter on, 305, 415 kinds of, 305 rations, 315 Powdered milk, 352 Principles of planting, 203 of spraying, 257, 258 Problems, 7, 16 arithmetical, 4 feeds, 342 fertilizers, 87 on eggs, 320 Products of cattle, listed, 344 Projects, 409 the dairy, 344 Propagation of forest trees, 182, 183, 184 plants, 35, 410 Property, value of, 366 Protein, 328 in feeds, 411 Pruning a budded tree, 38 annual, 208 care in, 210 choice in, 209 currants and gooseberries, 217 grapes, 217 high and low, 208 illustrated, 208-211 instruments, 210, 212 methods of, 209, 210 practice in, 210 principles of, 207 raspberries; and blackberries, 217 Pruning small fruits, 216 time for, 210 young trees, 208 Pupa stage, 223 Pure-bred animals, 260 milk, difficulty in obtaining,347 how to get, 348 Purity of corn, 136 Quantity of seeds for crops, 399 Questions, review, see end of each chapter Rag doll corn tester, 142 Rainfall, absorbing, 63 and frost, 197 Rambouillet sheep, 297 Raspberries, 216, 217 Rations, balanced, 340 Records for dairy cows, 355, 356 of fields, 365 Red polled cattle, 283, 284 Reference books, 391 tables, appendix, 391 to books, 60 References to bulletins, see Bulle- tins Remedies for codling-moth, 233 curculio, 234 flies, 229 grain moth, 231 mosquitoes, 227 potato scab, 252, 253 scale, 238 Reversion defined, 260 Review questions, see end of each chapter Rings of wood, 187 Ripened milk and cream, 353 Roads, concrete, 372 construction of, 373, 417 drainage of, 374 drag for, 373 earth, 373 grade of, 373 gravel, 372 importance of, 371 kinds of, 372 maintenance, 373 mechanics, 371 reasons for, 372 Robin arithmetic, 242 Roof garden, 201 Root crops, 97, 333 for dairy cows, 100 grafting, 36, 37 hairs, 8, 9 system of corn, 146 Roots, effects of drainage on, 68 for chickens, 213 of plants, 8 Rope, halter, 382 hitches, 378, 379 how made, 376 knots, 376, 377, 378 splices, long, 381 short, 380 Rotation courses, 94 of crops, benefit of, 90 need of, 90 reasons for, 88 for dairy farms, 92 Rotations, a few, 92 quick, 93 INDEX 427 Roughage, 332 Rows of kernels on corn, 139 Rules for alfalfa growing, 131, 132 corn judging, 134, 139 farmers, 401, Rust of apple, 205, 251 Rye, 158, 159 Saddle horse, 268, 270 Salesman, the farmer a, 365 Sampling milk to test, 357 Sandy soil, 52, 54, 59, 63 San Jose scale, 237, 238 Scab of apples, 249, 250 potato, 252, 253 Scale, San Jose, 237, 238 Schedule for placing agriculture, 4 School gardening, 198, 202 equipment, 199 experiments, 200, 201 in California, 192 place for, 199 plots, 198, 202 products of, 202 suggestions for, 199, 200 grounds described, 204 mapping of, 363 needs of, 204 plans for, 198 Scions for apples, 35, 37 peaches and plums, 39 Score card for cattle, 291, 292 corn, 140 horse, 275, 277 Scrub, see Native Stock Seed analysis, 25 cheap, 27 collection, 27 corn, harvesting, 145 storing, 145, 147 depth of planting, 193 for crops, quantity, 367 good, chapter on, 22" immature, 27 impurities, examining for, 28 potatoes, cutting, 166 treating, 253 samples of, 30 selection, 22, 23 testing, 25 what to buy, 27 wheat, 156 Seeding alfalfa, 112, 116 oats, 157 pastures, 109 Seeds, forest tree, 182, 183, 184 mounted, 29 purpose of, 20 structure of, 20 study of, 20 Selecting corn, rules for, 134, 139 Separators, hand, 854 Shallow tillage, 75 Sheep, care of, 298 chapter on. 293, 415 judging, 299 to kill weeds, 110 types of, 293 Shelter belts, 180. 181, 182, 185 Shire, English, 265 Shorthorns, 279, 280 Shorts, 335 Shropshire, 294, 295 Shrubs, masses of, 203 Sifting, grain, 22 Silage, see Ensilage Silk worm, 239 Silo, capacity of, 149 filling, 148, 334 masonry, 149 metal, 149 stave, 149 underground, 149 Silt, 52 Site for orchard, 206 Skim milk, 356. 359 Slips, see Cuttings Small fruits, to grow, 207 grains, chapter on, 154, 412 Soil, agencies in forming, 45 and fertilizers of, 154 builders, 45 clayey, 52, 53, 54, 59, 63 defined, 44 farm, 58 for barley, 158 improvement, chapter on, 71, 410 kinds of, chapter on, 52, 410 loamy, see Loam moisture, chapter on, 60, 410 names of, 59 oats, 157 packing of, 62 perfect, 58 plant-food form, 15 potatoes, 163 preparation for corn, 143 rocky, 53 sampling, 59, 60 sandy, 52, 54, 59, 63 texture of, 57 transported, 50, 51 warmed by drainage, 69 wind-blown, 45, 51 Soiling crops, 98, 99, 333 entire, 98 for the dairy, 98 partial, 98, 101 system, 98 Soils, characteristics, chapter on, 52 how formed, chapter on, 44 inoculation of, 112 water-holding power, 62, 63 in, 60, 63 Soluble oil, 238 Sorting and grading fruit, 218 219 Souring of milk, 351, 353 Southdown sheep, 294 295 Soy beans, 92. 99, 104 Specimens, preserving, 238, 239 Sphinx caterpillar, 241 Sports defined. 260 Spray mixtures, 395 time to, 259. 255. 256, 257 Spraying, 246, .250, 255, 258 orchards, 255, 257 principles, 257 Standarized milk, 352 Standards of feeding, 339, 362 428 INDEX Starch, 329 in plants, 13 State experiment stations, 393 Stems of plants, 9 relation of light, 10 sap in, 10 Steps in churning, 354 cheese-making, 355 Stock feeding, 337 Stocks for j.pples, 35 peaches, 38, 39 Stomates, 11, 12 Storage of sweet potatoes, 173 Stored grain, treatment of, 231 Storing corn, 147, 151, 152 vegetables, 196 Stover corn, 147, 152 Stratifying peach seeds, 39 Straw as feed, 332 Strawberries, 214. 215, 216 flowers of, 216 methods of planting, 214 varieties of, 216 Structure and physiology of plants, chapter on, 8 Subjects in school, 4, 5 Subsoil and plow, 58 Success, elements of, 363 in gardening, 191 Succulent feed, 316 Sucking insects, 220, 221 sprays for, 395 Suffolk Punch, 266 Sugar in milk, 346 plants, 13 Sugars, 329, 330 Suggestions to teachers, 2, 409 Sunlight aids plants, 12 need of, 12, 13 Super for hives, 325 Superphosphate, 85, 87 Swarming of bees, 325 Sweet corn, 100, 101, 102 potatoes, 171. 172. 173 cultivation, 173 fertilizer for, 403 harvesting, 173 hot-bed, 173 plants, 171 soil for 171 storage. 173 Swine, chapter on, 300, 415 feed for. 406 four stages in life of, 303 mineral of, 300 types for, 300 Syrian bees. 322 System in farming, 362 Systems, cropping, 88, 411 Tables, consult Appendix, 391 Tachinid fly, 229 Tamworth swine, 302 Tankaere. 84 Teachers, suggestions to. 2 Temperature and souring. 350, 351 in soil farming, 45, 46 Temperatures, 16 Tender vegetables. 193 Tester for ear method. 141 Testing milk and cream, 355, 359 results, 142 seed corn, 140 Thinning plants, lessons in, 201 Thorax of insects, 220 Thoroughbred, 260, 267, 269 Three-horse eveners, 385 Tillage, 72, 75 of corn, 145 Timber crops. 98 Time to prune, 210 Tips of corn, 136 Toads destroy insects, 240 Tobacco, care of, 176, 413 curing, 177 harvesting, 176 nicotine in, 175 seeding, 176 soil for, 175 sorting, 177 transplanting, 176 types, 175 varieties, 177 where grown, 175 Tomatoes, fertilizer for, 403 Tongue graft, 36 Treatment of seed potatoes, 253 Tree planting, 179, 188 Arbor Day, 188 seeds, 182, 183, 184 Trees influence water supply, 180, kinds of, 182, 190 raising of, 35 shape of, 180 top- working, 40 Trotter, American, 268, 269 Tuber crops, 97 Type of corn, 135 Types of cattle, 279 horses, 263 wheat, 154, 155 Typhoid flies, 229 Underdrainage, effects of, 64 principles of, 69 Unsoundness in horses, 273 Value of manures, 407 property, 306 the farm, 367 Variation among animals, 260 In milk, causes of, 346 laws of, 260 Varieties of chickens, 306, 309 fruit, 316. 317 Vegetable gardening. 191, 197 matter in soil, 55 Vegetables, hardy and tender. 193 planting distances for. 408 Ventilation by drainage, 69 of barns, 349, 350 xr-^rh, 99 Vines on buildings, 204 Vitality of seed cor:;, 136 Waeon jack, 387 v'asp witi> cicada, 241 Water, canillarv. 60-64 free in soils, 60, 61 INDEX 429 Water in flesh, 327 plants. 14 soils, 60, 63 Water in soil formation, 46, 47, 48 influenced by trees, 180, 181 Wax for grafting, 37 Waxing cotton for grafting, 37 Weathering of rocks, 46 Weed nuisance, 27 seeds, identifying, 25 sprouting, 112, 116 Weeds classified. 28, 32, 409 collecting, 38 common table of, 33 defined, 28 fighting perennial, 31 persistent, 30 preventing, 75 spraying, 31 Weevils, treatment for, 396 Weights of seeds, 399 Wet mashes for chickens, 316 Wheat, 154, 155, 156 fertilizer for, 402 Wheat, good and poor, 23 harvesting, 156 heavy seed, 156 in rotation, 92, 93 planting, 155 soil for, 155 types of, 154, 155 Whip grafting, 36 Wind-breaks, 180, 181. 182 for poultry, 311 Wings of insects, 314 Wood lot. 179, 181, 189 mounted samples, 187 rings of. 187 Wool, samples of, 299 yolk of, 299 Wrigglers of mosquitoes, 224, 226, 227 Wyandotte hen, 309 Yellow fever mosquitoes. 227, 228 Yellows of peach, 247, 248, 251 Yorkshire, large, 302, 303 Young animals, feeding, 339