OF T..,- UNIVERSITY OF SORESTRY THE PRACTICE OF FORESTRY CONCERNING ALSO THE FINANCIAL ASPECT OF AFFORESTATION THE PRACTICE OF FORESTRY CONCERNING ALSO THE FINANCIAL ASPECT OF AFFORESTATION PERCIVAL TRENTHAM LATE PROFESSOR OF FORESTRY AT THE ROYAL AGRICULTURAL COLLEGE, CIRENCESTKR PROFESSIONAL ASSOCIATE OF THE SURVEYORS INSTITUTION MEMBER OF THE LAND AGENTS SOCIETY HONORARY JOINT-EXAMINER IN FORESTRY AT THE SURVEYORS INSTITUTION FORMERLY LAND AGENT TO THE LATE A. C. PASS, ESQ., DEVON AND DORSET ESTATE LONDON T. FISHER UNWIN LTD. ADELPHI TERRACE First published in 1912. LIBBABT Printed in Great Britain. S3>37/ PREFACE IN the following pages I have endeavoured to write such a treatise on Forestry as will be found of universal use to Landowners, Land Agents, and all Students of the science of Forestry. It is very necessary to realise that a complete knowledge of the correct practice of Forestry can only be obtained by approaching the subject from a scientific attitude. There are many able foresters whose only school has been that of the lonely woodlands, but their ability is, nevertheless, the result of an unconscious scientific study. There is, however, a species of humanity — a class of self- styled experts — who advertise as being practical authorities on Forestry matters, and who boast that they eschew all that is scientific, but whose only passport is, in reality, that of garrulous ignorance, and an overweening confidence in their own inability. I cannot too strongly warn my readers against attaching any importance to the remarks or advice of such men as these. Now, whereas in the cultivation of field crops, a consider- able degree of proficiency may be acquired in an empiric manner, by merely watching the results of one's own practice, and without availing oneself of the lessons learnt by others, yet, in the case of Forestry, such would be impossible, for the life of mankind is far too short to admit of acquiring a complete knowledge of Forestry without studying the results of the actions of others, both of the present and past generations, and endeavouring to draw correct conclusions from observations so made. vi PREFACE Knowledge acquired in this way can only be the result of scientific study ; and this study may be greatly facilitated by a perusal of the current literature thereon. As regards Forestry education, I should like to express my opinion that British foresters can only learn their Forestry in this country. I scout any idea that a complete training in any contin- ental school can act other than most prejudiciously upon those who take such a course. For the practice in foreign countries is governed by different economic laws. And, although the main principles of correct continental practice are also applicable to this country, yet to pursue, in this country, much of the detail of such practice, would usually result in disaster, even if not in ridicule. Nevertheless, those who have had considerable experience in this country will find it an inestimable advantage to pay short visits to various continental forests. As regards the present volume, I have emphasised in black type a considerable number of words and sentences, as I feel that such a course will be of great benefit to a certain section of my readers. I would direct especial attention to that which I have said with regard to the choice of tree seeds (pp. 37, 38, 39, 194), the occurrence of and the susceptibility of trees to spring and autumn frosts (pp. 36, 37, 72, 73, 89) ; the preparation of land by ploughing, and subsequently planting with a plant- ing spike (pp. 67, 68, 118, 119, 132); and as to the partial clearance and underplanting of crops of timber (pp. 163 to 175). So, also, on pp. 317 to 322, I have endeavoured to show the fairness or otherwise of the railway rates charged for the carriage of timber — at present such a debated point. In Chapter XI. I have stated what I believe to be the average yield of crops of timber upon certain qualities of soil. In Chapter XII. I have dealt, in as simple a manner as possible, with the complex technicalities of the financial PREFACE vii aspect of Afforestation, and on pp. 246, 247, 248 I have shown the maximum present-day rental equivalents that may be expected to accrue from planting land of a given quality with trees, provided a particular price can be obtained for the timber ; whilst in Chapter I. I have dealt, in a general way, concerning the advisability or otherwise of the afforestation of land. Also, I direct especial attention to the data (on pp. 235 to 237) showing the enormous debt per acre that exists upon any normally stocked area of forest land. The whole question of the financial results of affores- tation has hitherto received but little consideration ; and the majority of those who are responsible for woodland management are entirely ignorant of the subject. And yet, reduced to its lowest terms, is not economic forestry merely a question of £ S. D. ? That the yields of crops of timber and the prices that will be obtained therefor are factors of great uncertainty, no one will deny. Yet such is no defence for the failure to adopt correct actuarial principles when considering questions of Forestry finance. Rather is it a reason why a high rate of interest should be looked for instead of a low rate, which latter so many seem to think is justifiable. I have no hesitation in saying that a study of the finances of Forestry is of far more importance to those responsible for woodland management, than is the study of any of the Natural History sciences allied to Forestry, such as Entomology, or Botany, or the study of Fungi, interesting and important though these be. In another volume I hope to deal shortly with some of these subjects, and also with certain extraneous matter, such as the conversion and the technical qualities of timber ; and, so also, concerning the utilisation of coppice produce, and woodland industries connected therewith. But such subjects are beyond the scope of the present volume. viii PREFACE Lastly, I wish to express my thanks to Professor Pritchard of the Royal Agricultural College, Cirencester, for having read through all my manuscripts (except Chapters I. and XII.), and for the many valuable suggestions which he has offered to me in connection with this work. And I thank M. Johannes Rafn, Seed Merchant, of Copenhagen, for much valuable information with regard to tree seeds and their germinative capacity. PERCIVAL T. MAW. NUTFIELD, SURREY, i st January 1909. TABLE OF CONTENTS CHAPTER I. AN INTRODUCTION. CONCERNING THE NATIONAL ECONOMIC IMPORTANCE OF WOODLANDS AND OF THE AFFORESTATION OF LAND. PAGB The Effects upon Climatic Conditions and upon the Locality . 1-6 As regards the Temperature of the Air and Soil . . I As regards the Moisture in the Atmosphere . — -„ . 2 As regards Soil Moisture . . . 4 As regards Protection against Erosion and Denudation . 4 As regards Shelter and Protection from Storms . . 4 As regards the Salubrity of the Atmosphere ... 5 Conclusion ....... 5 The Effects upon the Labour Market . . . 6-9 As to the Direct Effects of Afforestation with respect to Labour 6 As regards Afforestation as a Means of affording Work for the Unemployed . . . ... 8 The Financial Returns which Afforestation is likely to yield . 9-20 As to the Possibility of Permanent Advances in the Price of Timber . . . . . . . 13 Considerations in favour of General Afforestation Schemes . 14 Considerations which point to the Inadvisability of General Afforestation Schemes in this Country . J;>... . 15 ix a 2 x TABLE OF CONTENTS CHAPTER II. FOREST SYSTEMS. PAGE Simple Coppice . . . . . .21 Coppice with Standards . . . . . .22 High Forest Systems ...... 22-27 (1) The Selection System . ... 23 (2) The Group System . . . . -23 (3) The Compartment System . . . . .24 (a) Compartments of Even-aged High Forest (&) Two-storied High Forest (c) High Forest with Coppice (d) High Forest with Standards The Choice of Systems . - . . . . 27-31 CHAPTER III. THE NURSERY. Advantages of a Home Nursery ..... 32 Formation of a Nursery . . . . « • 33'35 (1) Choice of Site x* . , -33 (2) Size of Nursery . . . . ' ,v 4. 34 (3) Laying out a Nursery . . • .34 Nursery Management . , . • • • 35'55 (1) Seed Beds . ... . . . .. . v . . 3^ (2) Liability to Frosts , . , • 3^ (3) Choice of Seed . . . . '. f • • 37 (4) The Storage of Seed . '. ... 39 (5) The Sowing of Seeds . . . • ,. 4o (6) Treatment of Seedlings . - .•-•• . •' '• 47 (7) Other Methods of Raising Trees . i. .. . 52 (8) Stocking a Nursery with Purchased Plants « . 53 (9) The Pruning of Nursery Stock . . . . 54 (10) Lifting the Plants for Planting Out . . . '55 Insect and Fungoid and other Enemies in the Nursery . . 55-57 TABLE OF CONTENTS xi CHAPTER IV. PLANTING. FENCING AND PRELIMINARY OPERATIONS. PAGE Fencing of Land . , .* • . 58-64 Rabbit Fences . -. -. k . '''. . 58 Fences against Stock . :>v j;^y ,, . . 61 Cost per acre of a Rabbit Fence . .„-.,. . . 61 Drainage of Land V 4 '. ••»— :-v ~<2.J ": •* . 64-66 Other Preliminary Operations ' »« .,<.«. • . .. . 66-69 Cleaning and Preparing the Land , * ., ..; »,,•-_.- '« 66 The great Advantages of Ploughing the Land . - y^-, . 68 The Laying Out of Rides and Compartments . ..«-. . 69 CHAPTER V. PLANTING — continued. AS TO THE CHOICE OF TREES TO PLANT. CONCERNING ALSO THE SPECIAL DEMANDS OF TIMBER TREES, AND THEIR HABITS, AND THE CONDITIONS SUITED TO THEIR GROWTH, AND THEIR FINANCIAL RETURNS. The Individual Demands of Trees as to Locality and Soil . 70-89 The Aspect ....... 71 The Influence of Aspect and Altitude on Frosts . . 72 Aspect and Altitude in reference to Gales . . . 73 Altitude in reference to Tree Growth . . . -73 1. The Demands of Trees as to Moisture . . .74 2. The Demands of Trees as to Shelter and Protection from Gales and Frosts ...... 76 3. The Demands of Trees as to Depth of Soil . . .78 4. The Demands of Trees as to the Mechanical Condition of the Soil ....... 79 As to Food requirements ..... 80 As to Floods ....... 86 As to Fire ........ 87 Summary . . . . . . . . 88, 89 xii TABLE OF CONTENTS PAGB The Peculiarities of Growth and the Conditions suited to the Growth of Trees . . *_ . . 89-113 A. Concerning the Growth peculiar to Individual Trees : — (1) The Shape of the Crowns .... 90 (2) The Relative Height Growth . . . .91 (3) The Persistency and Vigour of Side Branches . 92 (4) The Shade-bearing or Light-demanding Qualities of Trees . . . . . -95 B. As regards the Conditions under which Trees may best be Grown : — (1) The Age and Distance apart at which Trees should be Planted ...... 96 (2) The Merits and Demerits of Pure and Mixed Woods, and the Methods of Mixing . . . • 97 (a) Even-aged Woods ..... 100 (£) Uneven-aged Woods .... 103 Good or Fair Mixtures . . . . _. 103 Bad and Inferior Mixtures . . . 105 Summary ...... 108 (3) The Choice of System . . . . .109 (4) The Advisability or otherwise of a Rotation of Crop- ping . . . . . . .no (5) The Season for Planting . . . . 1 1 1 As to the Financial Returns that may be anticipated by Planting one Species in preference to another . . . 114-115 CHAPTER VI. PLANTING — continued. PLANTING OPERATIONS. CONCERNING ALSO THE ARTIFICIAL SOWING OF CROPS OF TREES. The Different Methods of Planting Trees . . . 116-126 (1) Planting in Pits . . . . . . .116 (2) Planting in Holes made with a Planting Spike , » 118 (3) Planting with a Curved Planting Spade . . .119 (4) Notching or Slitting . . . . . 120 (5) Dibbling ; .. . . . . .-...' 122 As to the Choice of Methods . . . ' . .122 The Number of Trees per Acre ..... 123 Sundry matters relative to the Control of Planting Operations 124 TABLE OF CONTENTS xiii Some Notes on the Methods of Planting in Particular Cases 126-130 On Heather Land . . . . . . .126 On Wet Peat Land . •'.- s. ' .' . . 127 On Clay Soils ..... .127 On Exposed Land . . . . . .128 Planting Frost Localities . . . . .128 Planting Shifting Sand and Sand Dunes . . .128 Planting Ornamental Trees . . . .130 Estimates for Planting and Establishing . . . 131-136 The Artificial Sowing of Crops of Trees . . . 136-141 CHAPTER VII. THE TENDING OF YOUNG HIGH FOREST AND PRUNING. Cleaning and Tending Young Crops . . . 142-145 Thinning ....... 145-152 Pruning Trees . . . . . . 153-158 (1) The Pruning of Green Branches , • • '53 (2) Method of Pruning . . . . . 155 (3) Season for Pruning .... T • 1 56 (4) The Effects of Pruning . . . . 157 (5) The Pruning of Dead Branches . • . .158 Tables of Thinnings . . . . . 158-162 CHAPTER VIII. PARTIAL CLEARANCES AND UNDERPLANTING. Partial Clearances and Stimulation of Increment . . .163 Necessity for Underplanting ...... 166 Trees used for Underplanting . . . . . 167 Financial Result of Underplanting . . . . .169 Benefits resulting from the Retention of Humus owing to Under- planting ....... 170 Notes and Tables for Partial Clearances of Particular Species 172-175 xiv TABLE OF CONTENTS CHAPTER IX. NATURAL REGENERATION OF HIGH FOREST. PAGE The Selection System . . . v , ' , 176-179 The Group System . . .. . . . 179-181 Natural Regeneration of Whole Compartments of Even-aged High Forest . . . . . , . 182-187 (1) Preparatory Fellings . . . ". "'•'-*" . 182 (2) "Seed "or Regeneration Felling . ..". • • , 183 (3) Gradual Clearance of Mother Trees . . .184 The Natural Regeneration of Beech . . . 187-191 Under the Selection System . . . . .188 Regeneration of Whole Compartments . . . .189 The Natural Regeneration of Oak and other Trees . 191-193 Oak . . ;. . . . i&g rr 191 Ash . . . . . . r" ' / 191 Sycamore and Norway Maple . . $.« -•>. • • *92 Corsican and Scots Pines . . . • " . 192 Larch ,... ' . . .. .. ,. .. ^ 193 The Natural Regeneration of the Shade-bearing Conifers 193-195 The Comparative Merits and Demerits of the Systems . 195-196 CHAPTER X. TREATMENT OF COPPICE SYSTEMS. Simple Coppice . . . . . . 197-202 Length of Rotations . . . . . .197 Reproductive Power from Stools . « . . . 198 General Management I . ^ i ... . 199 (1) Planting up the Land . . . . 199 (2) Layering or Plashing . . ' '*' • « . 201 Coppice with Standards t *• ,.. .*.. . |.^- . 202-210 Tables of Fellings ,. . .. : . . 204 Expenses of Management . . . . . 208 The Conversion of Coppice, or Coppice with Standards, into High Forest . . . . . . 210 High Forest with Coppice . <• . • . . 211-214 Table of Fellings . . . . . . 212 TABLE OF CONTENTS xv CHAPTER XL AVERAGE YIELDS FROM FOREST LAND. PAGE Yield from High Forest V.< . . . . 215-225 Qualities of Soil . . ..-,*-, •> .,- ;. , .-. > 215 Oak . . . . . . ^ - .. . - .. 216 Beech . . . . , . . .".... V 217 Silver Fir and Norway Spruce . , . . , . 218 Scots Pine and Corsican Pine . ... . , 219 Weymouth Pine . ... . . . 220 Ash * . . ' . ' . '.''.•'.'". 221 Larch . . . . . . . * . _ 222, 223 Douglas Fir . . . . . . ' ~ * . 224 Sitka Spruce, Cupressus macrocarpa^ Willows and Poplars . 225 Yield from Standards over Coppice . ... 226 Yield from Coppice . . . . ..,,„• 227-230 CHAPTER XII. THE FINANCIAL ASPECT OF AFFORESTATION. Fallacious Methods of Presenting Financial Statements . 232-234 Initial Outlay Credited with the Income which is Receivable only after a Period of Years ... ,, . • * 232 Correct Methods of Presenting Financial Statements . 234-263 Statement of Income obtained on Average Accumulated Capital Sunk in Normally Stocked Areas . . 234 Statement of Gain in Capital after charging Compound Interest •. , . . . . .>*:; . 238 Statement of Rate of Compound Interest ** , ; . . 239 Statement of Yearly Rental Principle . . . . 244 Tables of Rentals yielded by different Crops in High Forest . 246 Advantages of Annual Rental Principle . . .251 The Financial Aspect of Underplanting . . . 252-257 The Financial Aspect of Coppice with Standards . . 257-261 Comparison of Actual Land Rentals with the Net Returns from Normally Stocked Areas . . . 261-262 Conclusion . . . . . . . • 263 xvi TABLE OF CONTENTS CHAPTER XIII. TIMBER MEASURING. PAGE Square of Quarter Girth Measurement . . ^ 264-276 (1) Measurement of Felled Timber . . . 265 Fraudulent Girthing . . . . .268 Booking Measurements < . . . . . 270 (2) Measurement of Standing Timber . . . . 272 Booking Measurements . . . . . 273 Other Methods of Computing Contents . . . 276-283 True Contents ....... 276 Calliper Measure ....... 277 Die Square Measure ..... 7T" 278 Board Measure . . . . ^ . 278 Table of Percentage Comparison of Contents computed by Various Methods . 282 CHAPTER XIV. THE MARKETING, SALE, AND TRANSPORT OF WOODLAND PRODUCE. Coppice Areas . . . < . . * 284-289 Conditions of Sale of Coppice . . . , * . 286 Uses to which Coppice Produce is put . * . . 287 High Forest Areas • • « '.-*' • • 289-304 (i) The Marketing of Thinnings . . : •« •*> . 289 (ii) The Marketing of Mature Timber . ,:;. -^ . 290 The Sale of Timber ...... 290 The Choice between Sales by Auction, Tender, and Private Contract ....... 295 Conditions of Sale of Timber ..... 298 The Marking and Lotting of Timber « . . . . 302 TABLE OF CONTENTS xvii PAGE The Felling of Timber . . . . 304-311 Season for Felling . , , . . . 307 Barking Trees . . . i' . . . 307 Extraction and Transportation of Timber . . . 311-323 Cost of Haulage by Horses ..... 312 Cost of Steam Traction . . • . . . .312 Forest Roads . . . . . . 313 Forest Tramway . . . . . .314 Timber Slides . . . . . . 316 Transportation by Canals . . . . .316 Railway Carriage of Timber . . . . 317 The Uses and Prices of Timber .... 323-333 CHAPTER XV. SYLVICULTURAL NOTES ON TIMBER TREES — BROAD-LEAVED TREES. Acacia . .- ^ . . .* . .^" . 334 Alder . . . . . . . . . 336 Ash . i ....... 338 Beech ......... 342 Birch ......... 346 Cherry . . . . . . . .348 Elm . . . '. ':.; • ' V1- . . . 349 Hawthorn ........ 352 Hazel . < . . •.;,: ..; ,-, :./, ^ ,;* _.-*• 353 Hornbeam ........ 354 Horse Chestnut . . . -i>-^.! *-'>*•-' • • 35^ Lime or Linden Trees . . . . . t •• 357 Oak . . . . . " . ^ . ^ . 359 Plane Trees . . . . . . . . 365 Poplars ........ 367 SpanishfChestnut ....... 372 Sycamore and Norway Maple . . . . -375 Tulip Tree . . . . . . • 377 Walnut . . . . . . . . 379 Willows . . . . . . . .381 xviii TABLE OF CONTENTS CHAPTER XVI. SYLVICULTURAL NOTES ON TIMBER TREES — continued. CONIFEROUS TREES. Cupressus . . . . . > • . 386 Douglas Fir . . . . . . . . 3^9 Larch v 392 Pines . . . . . . . . 400 Silver Fir ... v ' .- - . 4*4 Spruce . . . . . • • 418 Thuya .... ... 424 CHAPTER XVII. MEASUREMENTS FOR PURPOSES OF FOREST MANAGEMENT. Height of Trees ....... 426 Basal Area . . . . > ( . . . 427 Form Factor . . . . '. '. . , . 428 (1) Measurement of Sample Trees . : . * . . 429 Weise's method ....... 430 Other methods . . . . . . .431 (2) Measurement of Sample Plots ..... 432 (3) Estimation by Reference to Average Yield Tables . . 434 CHAPTER XVIII. ESTIMATION OF INCREMENT ON CROPS OF TIMBER. 1. Increment in Cubic Contents . . . •--•'• .• 437 Increment on Standing Timber . . .; . , 441 Pressler's Formula , . . . .- . 443 Schneider's Formula . . . . . . ' . 444 Maw's Formula . .- < . . . 446 Increment on Felled Timber . . * » ' . 448 Current Annual Increment * . ! . .• • 459 Average Annual Increment 4 •• . . . 451 2. Increment in Quality . * . i . .451 3. Total Increment on Invested Capital s v . . 452 TABLE OF CONTENTS xix APPENDICES. PAGE APPENDIX A. — Height Tables . . . . . 459 APPENDIX B. — Tables of Contents by Quarter Girth Measurement 467 APPENDIX C— Compound Interest Tables . . . 477 APPENDIX D. — Tables of Basal Areas for given Diameters . 485 APPENDIX E.— Tables of Basal Areas for given Quarter Girths . 487 INDEX ........ 489 ERRATA Page 49, last line.— Read "culls" instead of "calls." 138, line 36.— Read "ditissima" instead of "ditissina. THE PRACTICE OF FORESTRY CONCERNING ALSO THE FINANCIAL ASPECT OF AFFORESTATION CHAPTER I. AN INTRODUCTION CONCERNING THE NATIONAL ECONOMIC IMPORTANCE OF WOODLAND AREAS AND OF THE AFFORESTATION OF LAND. WITHIN recent years the study of Forestry in this country has received no little attention. Many landowners have displayed a lively interest in the welfare of their woodlands ; and not a few politicians and other public men have seriously considered the possibility and advisability of adopting, on behalf of the public, certain schemes of afforesta- tion on a large scale. The economic importance of woodlands, and the desira- bility of the adoption of works of afforestation in this country, may be considered under three main headings, namely : — (1) The Effects of Woodland Areas upon Local Climatic Conditions, and upon the Locality. (2) The Effects upon the Labour Market. (3) The Financial Returns which Afforestation is likely to Yield. THE EFFECTS UPON CLIMATIC CONDITIONS, AND UPON THE LOCALITY. As regards the Temperature of the Air and Soil. — The existence of large areas of woodland has an appreciable effect upon the temperature of the atmosphere within such A 2 AN INTRODUCTION areas, when compared to the temperature of the atmosphere in the open country. As a general rule, it may be stated that the average temperature throughout the year is less within woodlands than that which obtains in the open. And furthermore, that the average summer temperature is con- siderably less in woodlands than in the open ; whereas the average -winter temperature is usually about the same or very slightly lower than in the open. Then again, extremes of heat and cold are lessened within woodland areas. It has been found that during the hottest days in the year, the maximum temperatures registered within woodlands are always far below those registered in the open; and conversely, the minimum temperatures registered within woodlands during the coldest days of the year are never so low as those registered in the open ; especially is this so in the case of woodlands consisting of ever-green trees. So also, there are daily variations in the temperature of the air within woodlands, when compared to the temperature of the air in the open. Within woodland areas, the night temperature is practi- cally always warmer than, and never falls so low as, the tem- perature in the open ; whereas, during the daytime, the average atmospheric temperature within woodlands is always less than the average temperature in the open. The chief reason for these differences can be ascribed to the fact that the canopy of the trees prevents the soil from being rapidly warmed by the sun's rays ; and also, when once the soil has become warmed, the canopy of the trees prevents any rapid radiation of heat from the soil. And so, also, in the case of -woodland soils, it has been found that the average temperature of such soils is always less than that of soils in the open country. The greatest difference is observed in the summer months, whereas in the winter the difference is practically nil. As regards the Moisture in the Atmosphere. — The presence of woodlands probably does not materially affect the absolute humidity of the atmosphere if the neighbouring EFFECTS OF FORESTS UPON LOCALITY 3 country consist of pasture land, or if it be under cultivated crops, though the absolute humidity would be increased, if the neighbouring country were a dry, more or less barren, waste. Now, inasmuch as the average temperature of the air is less in woodlands than in the open country, it follows that the relative humidity of the atmosphere is much increased by the presence of woodlands ; especially does this increase take place in the summer and early autumn, when the difference in the air temperatures is at its greatest. Hence, on account of this increase in the relative humidity, there is always, cceteris paribus, a greater likelihood of rain or mists occurring in a well-wooded area than in a treeless country. This tendency to an increased rainfall is usually only noticed at very high altitudes, or in dry, barren countries ; for in the former case the extremes of temperature by day and night are nearly always far greater than at low latitudes,1 and in the latter case the absolute humidity in the summer months, as well as the relative humidity, is generally much increased. Furthermore, when the surrounding country is dry and somewhat barren, the summer rainfall is more regular. So also, an increased dewfall may always be expected on grass-land or on crops in the neighbourhood of woodlands. Then again, as air rises and gets more rarified, it becomes cooled, and, if its relative humidity were already near the saturation point, the moisture contained therein will consequently be precipitated either as mist, dew, or rain. On the other hand, at low altitudes in fertile districts large unbroken stretches of woodland may actually tend to lessen the rainfall, for although the average relative humidity is generally greater, yet the relative humidity at night-time, in the summer months, is usually less in woodlands than in 1 However, at the lowest altitudes, or those relatively lowest in a locality, there are often greater extremes of temperature by day and by night, than are experienced at medium altitudes. Especially is this the case in the spring and autumn, when, in the lowlands and coombes, frosts are often experienced at night ; whereas, at somewhat higher altitudes, these frosts do not occur. 4 AN INTRODUCTION open ground, since the temperature by night in woodlands is higher. As regards Soil Moisture. — Woodlands exert a consider- able influence upon soil moisture. For the canopy of the trees and the layer of humus prevent rapid evaporation of soil moisture; and the layer of humus, which is hygroscopic, also absorbs moisture, as it were, like a sponge. On account of this latter property, the layer of humus, assisted also by the obstruction afforded by the roots and crowns of the trees, prevents the rapid disappearance of any rainfall ; and it prevents the consequent flooding of streams and rivers ; and it prevents also the washing away and denuda- tion of the soil. Consequently, the duration of the beneficial effects of rainfall is prolonged ; especially is this the case in the early spring, before active transpiration has begun. It should be noted that in the summer months, an area covered by trees will utilise a far greater quantity of water than is lost by evaporation from the surface of bare land. For although soil evaporation is less in woodlands than on bare, open land, an enormous quantity of water is transpired by the trees. Another effect produced by trees is that the water table is lowered ; and, for this reason alone, the liability to floods is lessened ; for a greater quantity of water must be absorbed before flooding can take place. As regards Protection against Erosion and Denudation. — The beneficial effect which trees exert with respect to any direct erosion by rainfall has just been noticed. But losses sustained by erosion and denudation from other causes, such as that characterised by landslips and caused by the action of underground water or other agencies, can often be avoided, or at any rate lessened, by the judicious planting of trees and shrubs ; for their roots will help to bind the soil together. In this connection, the planting of stoloniferous shrubs, or trees which shall afterwards be kept coppiced, will generally be more advantageous than if an attempt be made to grow mature timber. As regards Shelter and Protection from Storms. — The presence of woodland is often of the greatest value, in exposed EFFECTS OF FORESTS UPON LOCALITY 5 localities, to agricultural interests. It is most advisable that as much shelter as is possible should be provided for farms in exposed districts. As regards the Salubrity of the Atmosphere. — The atmosphere in woodlands is always more free from impurities than the atmosphere in more thickly populated districts. It usually shows a remarkable absence of bacteria and of carbonic acid gas ; and on the other hand, it usually contains more oxygen and ozone than the atmosphere near towns. Then again, in the neighbourhood of Pine woods or forests of Silver Fir or Douglas Fir, it is probable that the atmosphere will contain more ozone than is found in other forest areas, and there will usually be found also appreciable quantities of hydrogen peroxide (H2O2), owing to the oxida- tion of turpentine. Conclusion. — Now, with reference to the foregoing, it is evident that afforestation may sometimes be judiciously carried out, even though there be no direct pecuniary returns by the sale of timber. For instance, the planting of -water catchment areas is in practically all cases desirable, not only on account of any probable increase in the rainfall, but chiefly because any sudden floods are largely avoided and the water is more gradually drained from the land, and the supply is thus more constant. And inasmuch as this is so, smaller reservoirs will suffice for any given supply ; and thereby the expenses of the whole undertaking can usually be greatly reduced. And then again, the planting of trees will often be advis- able in order to provide shelter for farms or houses in exposed localities. And so, also, afforestation may often advisedly be embarked upon in order to render the adjoining country fit for agricultural purposes. And though such opportunities are not very frequent in this country, partly on account of the moist climate which already naturally prevails, yet they do exist. In this connection, it may be well to note that in Belgium, and in other places in Europe, certain tracts of land, formerly useless for agriculture, have been rendered fertile in conse- 6 AN INTRODUCTION quence of the shelter afforded, and of the increased rainfall and humidity of the atmosphere, resulting from the afforestation of a part of the area. And on the other hand, the evil effects of the destruction of forests have in places been very evident. Districts which once were very fertile have become almost barren ; the rainfall in the growing season has almost vanished ; and the summer temperature has become greatly increased. Such examples are to be found in parts of Austria, in Cyprus, and the Russian Steppes. THE EFFECTS UPON THE LABOUR MARKET. As to the Direct Effects of Afforestation with respect to Labour. — When considering this aspect of the question, it is necessary to have regard to the annual cost of labour which a normally stocked forest area involves. This of course will vary a great deal, according to the cost of labour per day, the length of rotation under which the timber is grown, the kind of timber grown, etc., etc. But, on an average, it may be taken that normally stocked areas under high forest, which are regenerated artificially (by planting), will involve a minimum expenditure per acre per annum of 8s. 6d.1 for labour only ; and that normally stocked areas under coppice with standards, or high forest with coppice, will involve a minimum expenditure per acre per annum of us. 9d. for labour only. This latter price includes the " making up " of the underwood. In neither case, however, do these sums include the cost 1 The labour expenses in high forest are made up as follows : — General expenses in respect of ditches, roads, fences, thinning and pruning (labour only), etc. ,£023 Labour on planting, fencing, and cleaning young crops o i o Felling timber and making up cordwood and faggots ° 5 3 Equals £,0 8 6 Add, for Haulage 040 Total cost .£0 12 6 COST OF MANUAL LABOUR IN FORESTS 7 of labour spent in raising young nursery plants, nor the average labour cost per acre per annum, of hauling the produce to the merchants' yards or to the railway station, etc. Such extra cost for manual labour only would probably average about 43. per acre per annum, if the average distance along which the timber, etc., had to be hauled were from 3-i- to 4|- miles. Hence the minimum cost of all manual labour expenses incurred on nominally stocked areas of forest land (including haulage to market) may be reckoned at from 12s. 6d. to 15s. 6d. per acre per annum. Now these labour expenses per acre are very much below those which are incurred on an ordinary " mixed " farm, or even on a purely " grass " farm. And hence any afforestation of land (other than mere " sheep runs " ) which is at all adapted to farming, would result in diminishing the amount of labour that could otherwise be directly employed in the district. And on the other hand, the afforestation of purely waste land, or land used merely for sheep runs, would necessitate the permanent employment of additional labour. However, notwithstanding that a permanent loss of employment is incurred if afforestation be carried out on land now farmed in the ordinary manner, it may be advisable, if there be only a small area of woodlands in any neighbour- hood, to afforest a portion of such land. For, whereas the demand for labour on a farm is usually greatest during the summer months, and is very small during the winter months, the greater part of the work required to be done on forest areas can be executed in the winter, late autumn, and early spring. Hence regular employment all the year round, could be found for a given number of men ; and this con- dition of affairs is infinitely preferable to that of having a considerable number of men out of employment during the winter months, even though a somewhat greater number might find employment during the summer. However, the financial aspect of afforestation will usually have to be considered before such side issues as the effect upon the labour market. 8 AN INTRODUCTION As regards Afforestation as a Means of affording Work for the Unemployed. — Within recent years there has been some considerable discussion as to the advisability of adopting schemes of afforestation as a means of providing work in the winter months for those who may be out of employment. It has been urged that even if such schemes did not pay financially, they are justified and advisable, inasmuch as " relief works " of some sort must be embarked upon, and the planting up of land gives employment in the winter months. Now, apart from the financial losses which will probably result from most schemes of afforestation embarked upon in order to provide " relief works," a careful consideration of the whole matter should convince even the most enthusiastic supporter of such schemes, that the afforestation of land is singularly unsuited as a means of affording winter employ- ment for those who may be seeking work. Among the more important reasons why afforestation "relief works" cannot be considered advisable, may be mentioned the facts that the cost of the manual labour required in the winter months, in order to establish a crop on maiden land (including cleaning for the first few years), represents only about one-third l of the total outlay expended in planting, fencing, cleaning, etc. ; and that about an acre of land must be acquired for every £2 2 that can be distributed as wages in the winter months. Hence, supposing that land could be acquired for £8 an acre, and that the cost of planting, fencing, and cleaning the young crop, etc., were £6 per acre, then, for every £2 that can be distributed as wages in the winter months, a capital of £14 is required. So that, in order to provide 100 men with winter work for 16 weeks, at £1 per week, it would be 1 This, however, must vary a great deal. 2 This depends upon whether planting be done in pits or by notching, etc. ; i acre to £2 in wages has been taken as an average, though if the notching of seedlings were adopted, a greater acreage would be required. On ordinary waste land trees should seldom be planted in pits. UNDESIRABILITY OF RELIEF WORKS 9 necessary to acquire 800 acres of land, and to expend a total sum of .£11,200. And although ultimately some return on this money may be looked for, yet many years must elapse before any revenue is derived from the money thus expended. It is a sine qua non that the expenditure on any more or less unnecessary work, undertaken in the nature of "relief work," should be almost entirely on behalf of the cost of the manual labour required for such work. There are, moreover, several other objections to any schemes of afforestation undertaken in the nature of relief works, amongst the more important of which may be mentioned the following: — (1) In frosty weather, when the distress arising from unemployment is most severe, all planting operations must be suspended. (2) There is usually no suitable land for afforestation near the big cities and towns ; and if land be acquired at a distance, all expenses will be greatly increased, as, for instance, the cost of railway fares, living and sleeping accommodation, etc., etc. (3) If somewhat high-priced agricultural land be acquired in the vicinity of the cities or towns, the chances of obtaining any ultimate profit will be very much lessened ; and the amount of the annual labour, at present employed on such land, will be much reduced, thereby increasing rural depopulation and lack of employment for the doubtful benefit of providing employment for others for a few weeks in the winter months. (4) Planting requires considerable skill, and the casual labour of inexperienced " hands " can only be bene- ficially made use of to a slight extent. THE FINANCIAL RETURNS WHICH AFFORESTATION IS LIKELY TO YIELD. The Financial Aspect of Afforestation, on the assump- tion that the prices obtainable for timber will remain at their 10 AN INTRODUCTION present levels, is fully considered in another portion of this book (vide Chapter XII). It is there shown that if money be borrowed at 4 per cent, interest, a direct loss will usually be incurred by planting land, the soil and situation of which may be classed as Quality II., with such trees as Beech, Norway Spruce, Silver Fir, Scots Pine, Oak, and Weymouth Pine, and this even though the land could be acquired rent free. The losses are greatest in the case of the first mentioned trees. If, however, money could be borrowed at 3j per cent, interest, the losses would not be so great, and, in the case of Weymouth Pine, a small rental equivalent of is. 2d. per acre per annum would be returned for the land, if the cost of establishing the crop, including fencing and cleaning for the first few years, were £8 an acre. If, however, the cost of establishing the crops could be reduced to £$ an acre, small rentals could be earned by all the crops, except Beech. So, also, if money could be borrowed at 3 per cent, interest, still better results would be achieved. On the other hand, it is shown that such crops as Douglas Fir, Larch, and Ash, will, if all goes well, not only pay 4 per cent, interest on the cost of establishing the crops, but will yield in addition a handsome rental for the land. Other trees which pay well in most cases to grow at present prices are Black and White Poplars, Willows, for cricket bats, and Spanish Chestnut. Also, although their value in this country has not been proved, such trees as Black WTalnut, Sitka Spruce, Tulip Tree, Thuya gigantea, Cupressus macrocarpa, Oregon Ash, and the White Ash, will probably yield excellent results ; although any planting of such trees must, at present, be looked upon in the light of an experiment. Furthermore, with reference to the yearly rents which crops of timber may be expected to return, as shown in Chapter XII., it should be noticed that these data have reference, for the most part, to crops grown on land, the soil and situation of which is classed as Quality II. If the soil and situation were Quality I., the crops would yield much FINANCIAL CONSIDERATIONS 11 better yearly rentals ; but if the soil and situation were Quality III. or IV., the yearly rentals yielded would be much less, and any losses sustained would be much greater. And therefore, when contemplating afforestation, it is most important to accurately gauge the quality of the soil and situation. In this connection it may be stated that there is very little land which can be classed as Quality I. for any of the valuable trees, except the Pines, which is not already profit- ably employed for farming or otherwise. There are of course vast areas of " waste lands " in Great Britain ; but these, for the most part, are only suitable for the growth of coniferous trees, and must generally be classed as Quality II., or III., or IV. The total area of waste lands in this country which is at all suitable for tree growth, is purely a matter of conjecture. One writer1 suggests about 2j million acres in Great Britain, and f of a million acres in Ireland. But whatever the amount may be, any attempt at afforestation of waste lands on any large scale, must, if the present prices which are obtainable for timber remain unaltered, result in a colossal failure, unless indeed money can be borrowed at a very much lower rate of interest than is at present possible. Financed at 3 per cent, or 3^ per cent, interest, such schemes can never pay with trees such as Scots Pine, Norway Spruce, Silver Fir, Weymouth Pine, Beech, or Oak. However, there are certain areas of waste land, especially on the northern aspects, which may often be profitably planted with Douglas Fir, Larch, Poplars, or Ash. Indeed, the Douglas Fir, along perhaps with Sitka Spruce or Thuya gigantea, may prove most valuable for planting extensively on waste lands, and will, in all probability, often render advisable the afforestation of land which could otherwise only be afforested at a great monetary loss. But, of the utility of these trees on the poorer classes of land, it is as yet too soon to speak ; though it is certain that, unless indeed the atmosphere be continually very 1 Nisbet, in the Forester ; vol. i., p. 95. 12 AN INTRODUCTION moist, they will only succeed on fairly deep soil containing plenty of moisture. As regards the choice l of trees that may be planted on waste lands, it may be accepted as a general rule that land which is covered with heather, or at any rate on which the heather has long been established, is almost always too acid for the growth of any valuable broad-leaved trees ; and therefore the choice must be confined to the conifers. However, apart from the afforestation of waste lands, it will nearly always pay well, even at present prices, to replant any land from which a crop of timber has just been removed. For such land will generally be suitable for planting some of those species of trees which are very profitable, even though an unprofitable species may have just been cleared. And even if it be necessary to replant with a species which is not at present profitable if planted on maiden land, yet, if the land be clean, a profit may often be realised owing to the decreased cost of establishing the crop. Land from which a crop has been removed is usually practically worthless except for replanting ; for the cost of converting it into farming land is nearly always prohibitive. So also, there are large areas of land now let to farmers at low rents of about 53. to 73. an acre, which are very inferior for farming purposes, but which, if afforested, should easily return rentals equivalent to 93. or los. an acre, or considerably more, if suitable for the growth of Douglas Fir or Black Poplars. Considerable quantities of such land exist on most estates on the northern aspects, on which, it should be noted, tree growth usually flourishes best ; whereas land with a northern aspect is always inferior for farming purposes. Such land, also, usually exists in considerable quantities in districts where the surface soil is shallow, but where there is a very disintegrated subsoil rock. However, unless a rise in the price of home grown timber be assured, it is hardly likely that any considerable number of landowners will deem it expedient to sacrifice an existing present rental for the ] This matter is fully dealt with in Chapter V. FINANCIAL CONSIDERATIONS 13 equivalent of a small increased rental, the accumulated value of which can only be realised after the lapse of a considerable number of years ; since, until such time, a considerable capital must be locked up, without any yearly income being received. Furthermore, the profitable production of timber is penalised by the present incidence of local taxation ; the ever growing tendency to a rise in rates ; and the levying of charges for "extraordinary traffic," occasioned by the removal of timber. A consideration of the foregoing leaves little doubt that, generally speaking, there is little inducement from a financial point of view to afforest land on any large scale, except when such crops as Douglas Fir or Poplars, or (in many cases) Larch or Ash can be grown, unless, indeed, sub- stantial rises in the prices of timber should occur and be maintained. As to the Possibility of Permanent Advances in the Price of Timber. — Inasmuch as any great schemes, relative to the general afforestation of waste lands, must end in failure unless greater prices for timber be realised in the future than at present prevail, almost all advocates of such schemes have persuaded themselves, and endeavour to persuade others, that a timber famine is imminent, or at any rate a famine in coniferous timber ; and that, in the near future, the prices realised for home-grown timber will be infinitely greater than those which have prevailed for the last few years. Now, that there is some possibility of a general rise in prices, it is impossible to deny. But the whole question is such a very complicated one, and depends upon so many widely different circumstances, that it is at present impossible to arrive at any definite conclusion upon the subject. Nevertheless, this matter concerning the probable trend of prices and the available timber supply in the future, should receive the earnest attention of all who may be interested in the welfare of British Forestry. Stated briefly, the following are some of the chief con- siderations which may be urged on behalf of, and against, 14 AN INTRODUCTION the adoption of general schemes of afforestation, from a purely financial point of view : — Considerations in favour of General Afforestation Schemes in this Country : — (1) The climate of this country is admirably suited for tree growth. (2) This country at present imports enormous quantities of coniferous timber, which, if grown at home, would represent the yearly production of about 10 million acres of land. (3) The easily available supplies for export, in the chief exporting countries in Europe, are rapidly diminish- ing ; and European countries do not at present supply the total requirements of the whole of Europe ; and these requirements are continually increasing. (4) The prices of timber will probably rise when the produce of virgin forests is no longer forthcoming. (5) In the advent of a change in the fiscal policy of Great Britain, prices of home-grown timber would advance if an import duty were levied upon foreign timber. (6) As areas become afforested, so, it is asserted, will new local industries, utilising wood as their raw material, be established ; and thus, better prices should be obtained for timber. This, however, is very problematical, for it has not occurred in many well-wooded districts where there is a difficulty in marketing the timber. (7) Improved methods could be adopted to some extent in the marketing of timber ; thereby securing to the grower a better price. Such methods would include the semi-conversion of timber in the locality where grown. (8) The price of certain kinds of timber will probably rise considerably owing to special circumstances. For instance, Poplar wood,1 on account of its fire- 1 The non-inflammability of Poplar wood has long been recognised by land agents in hop districts, and used, in consequence, for the FINANCIAL CONSIDERATIONS 15 resisting properties, should be largely used for all internal boarding in house building — e.g. boards for flooring, lining, sarking, etc. Hence an increase in the price of the timber may be anticipated. Considerations which point to the Inadvisability of General Afforestation Schemes in this Country : — (1) The present forest area in Europe is far greater than is necessary to supply the amount of timber annually required in Europe ; and a small advance in present prices would enable the timber on immense areas to be profitably marketed. The same result would follow if increased facilities for transport were provided in districts from which it is impossible, at present, to profitably export timber. And moreover, apart from such industries as the manufacture of wood pulp, a woodland area of } of an acre, of average quality, per head of population will easily provide enough timber for all domestic requirements — the requirements of Great Britain are about one-half of this amount — and, on the basis of f of an acre per head of population, the forest area of Europe, exclusive of Russia and Finland, is more than sufficient. Furthermore, the forest area of Russia and Finland shows a surplus of 400 million acres of forest land, after deducting f of an acre per head of population of these countries ; how- ever, much of this forest in Russia and Finland is practically worthless, and must always remain in- accessible. (2) The forest area of Canada, producing, or capable of producing, good marketable timber, is about 300 million acres. This area, if properly managed and exploited, could perpetually supply, according to battens of the floors of hop oasts. It is greatly to be desired that the model bye-laws of the Local Government Board, and also the bye-laws of the Local Authorities of all big towns and cities, should specify the compulsory utilisation of Poplar wood, in preference to Deal and Fir, for use, wherever possible, in building construction. 16 AN INTRODUCTION present demands, all the timber required by the whole of Europe, in addition to Canada's domestic requirements. (3) The forest area of Siberia is immense, and must in future generations help to prevent any shortage in the world's timber supply. (4) The majority of waste lands in this country are far removed from all consuming centres, and, owing to the fact that the transport of timber must generally be by rail or road, the cost of marketing home- grown timber will, in many cases, exceed the cost of marketing in Great Britain that which is grown in foreign countries. For instance, Swedish timber, grown within two miles of the banks of one of the rivers flowing into the Baltic, will probably not have cost in transportation, from the place where the log was felled to any large British port, more than about 4d. to 5d. a cubic foot, and sometimes even less. But on the other hand, British grown timber will often have cost twice or thrice that amount before it can be delivered at a large consuming centre. For, often, the British grown timber has to be hauled 6 to 8 miles to a station, and then perhaps 50 to 60 l miles to some large town ; whereas the Swedish grown timber, as instanced, would be taken on sleighs to the river's edge, or perhaps shot down a timber slide into the river, and then it would be floated down the river to the saw-mills, at an almost infinitesimal cost, and then shipped direct to a British port.2 So again, timber can be felled near the coast of British Columbia, or in parts of Vancouver Island, and can be delivered at a British port at a cost for 1 It should be noted that if large areas were afforested, any small local markets would soon be glutted, and the large consuming centres at a greater distance would have to be sought. 2 Timber can be shipped from a Baltic port to London at about 2£d. to 2|d. per cubic foot. FINANCIAL CONSIDERATIONS 17 transportation l which will not exceed that which is often incurred in the case of British grown timber. Furthermore, with reference to the cost of the importation of Canadian timber, there is every probability that, on the completion of the Panama Canal, the rates from the Pacific coast to Great Britain will be less than they are now. So also, much timber may, in the future, find its way to this country via Hudson's Bay, at a very low rate. (5) Even if a timber famine were certain, it would often be preferable, from a financial point of view, to re- afTorest easily accessible areas in foreign countries than to afforest waste land at home. For, apart from the question of transportation already referred to, it will often be possible, especially in countries with a cold winter climate and a short growing season, or wherever the surface of old forest land is clean, to raise crops from seed at a minimum expense ; whereas, owing to the warm, moist winter climate in this country and the long growing season for most vegetation, it is usually very expensive, and often almost impossible, especially on maiden land, to raise crops from seed. And then again, in foreign countries there is often no necessity to fence a young crop from rabbits, whereas in this country it is practically always necessary. Now, a sum of 3