Biological & Medical Serials LAWES AGRICULTURAL TRUST. Rothamsted Experimental Station, Harpenden. Annual Report for 1911 with the Supplement to the “Guide to the Experimental Plots,” containing The Yields per Acre, etc. In every case the page, table, and plot nut *rs refer to the “ Guide,” it being under- stood that no change is made in f ~“*anuring, etc., there described. rim - / 3 A. D. HALL, Direffor. Mp. ak SO Oy PST OF Tonos a nr PRINTED By D. J. JEFFERY, VAUGHAN ROAD 1912 HARPENDEN: Digitized by the Internet Archive in 2010 with funding from University of Toronto http://www.archive.org/details/report1911 roth LAWES AGRICULTURAL TRUST. Rothamsted Experimental Station, Harpenden. Annual Report for 1911 with the Supplement to the “Guide to the Experimental Plots,” containing The Yields per Acre, etc. In every case the page, table, and plot nut ~*rs refer to the * Guide,” it being under- stood that no change is made in f< *anuring, etc., there described. rim VY MV, , : ‘ee rei fe SY PRINTED BY D. J. JEFFERY, VAUGHAN ROAD HARPENDEN: 1912 Laboratory Staff. Director Chemist Goldsmiths’ Company’s Soil Chemist Bacteriologist Botanist Organic Chemist Biologist Assistant Soil Physicist Farm Manager Mackinnon Research Student, R.S. A. D. HALL, M.A., “eee . N. H.-J. MILLER, Phe E.. J. RUSSELE, | Barley Straw... Cwt 10°] Lies Lasy 16°9 18°7 23°8 1910 | Clover {Ist crop Cwt. — 16 24°1 — 32°2 | Hay (2nd crop Cwt. 15°8 = 40°0 — 44°5 | | 1911 ! Wheat Grain ... Bus. 23°9 24°5 31°9 37°8 3555 38°0 ) | (| Wheat Straw ... Cwt 20°4 21°4 28°6 3350 29°3 3273 . The plant almost entirely failed on this plot, and new seed was sown broadcast on May Ist, 1906. é 15 METEOROLOGICAL RECORDS, 1911. (See ‘* Guide,’ page 16, Table IX.) 2 ane | Rain. | =) eee | Drainage through rT | {Se ace emperature. Total Fall. Rainy Bright Days. Sun- ie ; 3 shine. Tos | S-inch | z900 roo 20 ins. 40 ins. | 60 ins. Mae: xe Funnel | Acre Acre deep. deep. deep. NAAN. | SNAIL Gauge. | Gauge. | Gauge. | cae ewes | Inches. | Inches. No. [| Inches. Inches. |Inches.}] Hours.} °F. | °F. Jan. ae 1°269 eon 15 1°163 LAT 1°266 64°74 41°9) 32°2 Feb. 1°782 1°878 15 0°776 OAlZ, 0741 764] 459) 33°] March 2°09C 2°267 20 1°245 1°356 1°370 85°2] 471 34°8 | April 1°501 1°594 1] Oi535 0°586 1091 New etsy) (eee ield | SS Viay/ May 3°688 3°788 10 2°020 1°856 1°878 2116] 65°11) 446 June 2°601 2°736 12 0°854 0°837 0°792 201°8] 67°4) 49°71} July 0°636 0°654 5 0°007 0°040 0°045 31950°9) ./6:3 | 53°3'] August ...| 0950! 1°048| 10 — 0°004 | 0°004] 227°3 75°9| 55°0| Sept. eisep') 15171 9 = = as 2229] 68°8| 47:2 Oct. 3°301 3°474 17 1°947 1°828 L723 98°8]— 561] 42°0 Nov | 3°266| 3°444| 21 2347 | 27I9 | (P6704 . CeSe 465) see Dec e 6°110 6°255 | 26 6164 5°97] 5'822 49°3} 48'°0| 37°0 Total or | 58-560 | 30°030| 171 | 177556 | 17°191| 17°404] 1785°6| 57°9| 41:9 Mean | | = — —< — — - — MANGOLDS, BARN FIELD, 1911. (See ‘‘ Guide,’ page 11, Table VI.) ion e eet) Cross Dressings. ’ =: | O. N. A. A.C. G& Strip. \ 2e3 ee ee - — ————| Manures. ay F Rape Cake & Nitrate of Ammonium : : None : Sap Ammonium Rape Cake.| Soda. Salts. A le Fy SP aS Salts. _ lies ee c? Tons. Tons. Tons. Tons. | Tons. ly (R. 13°41 14°87 9°14 14°53 15°77 pe ese only +) it 224| 5°32 4°12 360 3°55 | 2 | Dung, Super, | (R. 1494 12°29 12°45 20°30 21°19 | Potash (Wy, ..2"40 Sah. 5°34 4°73 3°97 (6-41) e 6°14 13°41 11°79 i Complete | R. 214) | agg | aia ralls Vier 28) de oe 4°27 612 3°97 | 4°02 | 5 Superphosphate, /R. 0:99 5 64 1°15 0:95 0°86 only (eee 1°20 4°45 Lthul j gs 1°04 6 | Super and (R. 1°56 518 4°53 8 23 813 Potash Heli. O0'99 3°82 3°45 5°24 4°02" al : ; poe ore, 1312 4°13 3°79 5°72 413 | Sodium (R. 0°80 2°30 1:09 114 0:51 | ' None «-- ++! (21. 0°99 2°55 1°43 1°47 093 | 16 HAY. THE PARK GRASS PLOTS, 1911. (See ‘‘ Guide,’ page 19, Table XI.) | Yield of Hay per acre. Plot. | Manuring. / —— == ——<—<—<$<<$<$<$<$== Ist Crop. | 2nd Crop. Total. | | es ~ ae SSS ee | Cwt. Cwt. 1 eee Unmanured : wih i 121 ape aay St 1) 490 190 2 | Unmanured (1) aH 2173 2553 1 | Ammonium Salts alone (1). Shp 214 Ai | 4-1 | Superphosphate of Lime... || 20°4 20°4 8 | Mineral Manure without Potash ... 23°6 23°6 . 7 | Complete Mineral Manure ... sei 31°9 31°9 6 | As 7, 1869 and since (2) ise Ame AN) re 288 15 | As 7, 1876 and since (3) Bee! 33°3 2 33°53 5 | Superphosphate and Potash, 1898 an and since... : aS a 16°7 = 16°7 17 | Nitrate of Soda alone. sii east 30°3 A 30°3 | 4-2 Superphosphate and Amm. Salts ... 26°5 Z 26°5 | 10 | Mineral Manure (without Potash) | = and Amm. Salts... csjilisll rea) Bs Jes! | 9 | Complete Mineral Manure and Amm. n Salts . “OF 415) 8, fe) cso} 8) | 13 | Dung and Fish Guano, ¢ once in 1 4 years 39°71 Zz 3971 | 11-1 | Complete Mineral Manure and extra | | Amm. Salts. Fs ae A 46°5 465 11-2 | As 11-1, and Silicate Soda... asd 52°9 52°9 16 | Complete sabes Manure and Nit. Soda= 43 lb. Se 39°9 39°9 14 | Complete sain Manure and Nit. Soua= 86 te =... stair ees 444 | ) 44°4 Quick Lime (ground) at the rate of 2000 Ib. per acre, applied to the South half of plots 1 to 4-2, 7 to 11-2, 13 and 16, in January, 1907. (1) Received Farmyard Dung, 8 years, 1856—63. (3) Nitrate of Soda alone previously. (2) Ammonium Salts alone previous to 1869. BOTANICAL COMPOSITION, PER CENT. First Crop, 1911. (See ‘‘ Guide,’ page 20, Table XII.) Plot. | Manuring. | Graminee. Leguminose. | Oe Orders. \ee a era FO : : | I’er cent. Percent. | Percent. 3 | Unmanured ie we aay 45°7 4°5 49°8 4-1 | Superphosphate of Lime a 45°2 10°0 44°8 8 | Mineral Manure without Potash | Dire 90 39°5 7 | Complete Mineral Manure ae 65°3 10°4 | 24°3 6 | As 7, 1869 and since (2)... ... 58°83 0 121 —. 15 | As 7, 1876 and since (3) ... veal 61'8 | 48 | 334 Li WHEAT. BROADBALK FIELD, 1911. (See ‘‘ Guide,”’ page 26, Table XIV.) Dressed Grain. wey, Plot. Manuring. : ao a Straw. ; Weight ble _ per Bushel. Bushels. lbs. Cwt. 2 | Farmyard Manure ... ae: a 35:2 66°7 36:9 — 3 | Unmanured ... ae ic et NA] 64°4 9°8 5 | Complete Mineral Manure ... Say 14°8 65°1 12°8 6 | As 5, and single Amm. Salts oe lye 63'3 17:9 7 | As 5, and double Amm. Salts aol 25°6 66'0 27°6 8 | As 5, and treble Amm. Salts a 304 | 66°6 35°7 9 | As 5, and single Nitrate Soda oo 29°9 \ 6576 29°0 10 | Double Amm. Salts alone ... ae 22°8 65°1 L732 11 | As 10, and Superphosphate .. e 20°1 63°2 Lanz 12. As 10, and Super and Sulph. Soda | 27°0 648 | 20°6 13. | As 10, and Super and Sulph. Potash 29°7 66°0 27°4 14 | As 10, and Super and Sulph. May. Aad 64+°4 18°9 15 | Double Amm. Salts in Autumn, and _ Minerals... mee 24°1 65'8 223 16 | Double Nitrate and Minerals oA 404 | 60'8 CN 17 | Minerals alone, or double Amm. Salts esses *64°9 lly) 18 (| _ alone, in alternate years ... ea ie niche: | t66°1 +24°6 19 | Rape Cake alone ae 28 °6 ) 65°8 24°7 20 (1) | As 7, but excluding Superphosphate | 21°6 65°7 18°0 * Produce by Minerals. + Produce by Ammonium Salts. (1) Commenced in 1906. BARLEY. HOOS FIELD, 1911. (See ‘‘ Guide,’ page 33, Table XVI.) Dressed Grain. Plot. Manuring. TSE ae RINE | Straw. ; zs Weight / . — _ per Bushel. . _ Bushels. | lbs. Bahn OF} Unmanured ... : ane el 49 54°4 575 | 20 | Superphosphate only ae ei, 11°9 55'8 F1 30 | Alkali Salts only ae Sa EY ok 8s. 54°9 53 -40O | Complete Minerals ... As -22)| 59 56'1 78 1A | Amm. Salts only 23s :; el 13°8 52°9 eS 2A | Superphos. and Amm. Salts ae 10°3 5315 11°6 3A | Alkali Salts and Amm. Salts a 11°8 556 141 4A | Complete Minerals and Amm. Salts | 28°5 56°3 22°9 | 1N | Nitrate of Soda alone e srs 16°2 53°8 17°8 ~2N | Superphos. and Nitrate Soda ee 261 ) 55°4 24°7 | 3N | Alkali Salts and Nitrate Soda ae 12:5 543 14°5 | 4N | Complete Minerals and Nitrate Soda 28°9 55'8 23°7 | 1C | Rape Cake Ree : ze 27°4 56'8 20°7 | 2C | Superphos. and Rape Cake ... x 28°2 57 1 20°8 3C | Alkali Salts and Rape Cake .. as 21°6 560 18°6 ~4C | Complete Minerals and Rape ‘Cake 25°7 56°6 20°1 ; 7-1 +| Unmanured (after Dung, ee eee 9°5 564 10°5 | 7-2 | Farmyard Dung 5h : Loe 23°0 56°2 240 | | BARLEY. HOOS FIELD, 1911. (Previous Cropping: Potatoes, 1876-1901; Barley, 1902 and 1903; Oats, 1904; Barley, 1905 and since.) (See ‘‘ Guide,’ page 40, Table XIX.) Manures applied Dressed Grain. 2 to the Potatoes, : : Total P lot. 1876-1901. l Weigel a Produce. Unmanured since | Yield cles tpee ; “i ‘| Bushel. | Bushels. lbs. Cwt. lbs. 1 | Unmanured . | (36 lbs.) | —- 12 175 2 Unmanured 1882 to 1901, ae 54°71 510 797 previously Dung only 3 | Dung 1883 to 1901 10°8 56°3 es 1919 4 | Dung 1883 to 1901 1) E86 57°0 13°5 2337 WHEAT AFTER FALLOW (without manure 1851 and since). HOOS FIELD, 1911. (See ‘‘ Guide,’ page 41, Table XX.) Dressed Grain Straw Total produce { Yield—17°0 Bushels. { Weight per Bushel—64°2 lbs. 13°7 Gwe 2687 Ibs. 12 COMPARATIVE TEST OF NITROGENOUS FERTILISERS. MANGOLDS (after Wheat in 1910, and Barley in 1909). LITTLE HOOS. FIELD, 1911. Manuring in 1911. 3 cwt. Superphosphate, and 200 lb. Sulphate of Potash Bee As 1 and 6, and Nitrate of Soda= 50 Ib. N. : rs =e As 1 and 6, and Nitrate of Lime= 50 lb. N. a2 ~ ok As 1 and 6, and Sulphate of Ammonia =50 Ib. N Pee an ee As land 6,and Cyanamide=501b.N. As land 6, and equal parts Nitrate of Lime and Cyanamide=50 lb. N. As 1 and 6, and a mixture of 1 part Nitrate of Lime and 2 parts Cyan- amide=50 lb. N. ah, Produce per acre. | Leaves Total | Tons. Tons pea 11°9 2°4 12°2 31 | 207 27 15°8 6 17°6 ie’ 14°7 aH pe aye! 2-4 11°9 aio 14°9 24 11°9 S je | 12°7 24 123 3-1 130 20 10°4 20 LITTLE HOOS FIELD, 1904-1911. RESIDUAL VALUE OF VARIOUS MANURES. (See ‘‘ Guide,’ pages 41 and 42.) TOTAL PRODUCE-— Grain and Straw, or Roots and Leaves, per acre. Gascon = Man- | Sprine Man- ae Manuring. Swedes Barley} golds Rw heal Swedes |Ban golds Plot. 1904. | 1905. | 1906. | 1907. | 1908. | 1909. | 1910. | 1911. Tons. | lbs. | Tons.} lbs. | Tons. | Ibs. Ibs. | Tons. | 1A] Unmanured ee ue SOF | 2320 | 17°1 | 3650 14'0 -| 3792 | 2270) 116 2 Dung (ordinary), 1904 and 1908 13:1 4649 | 18°2 | 4673 19 1 5128 | 2572 | 13°9 3 - 4 1905 and 1909 88 | $501 | 17°5 | 5393] 145 | 5544 | 2681 | 141 4 a “ 1906 and 1910 S28. 12269 ese a 71 15°5 | 4057 | 2406 | 12°5 5 1907 and 1911 | 9°8 | 2402 | 14°9 | 6903] 17°3 | 4581 | 2358 | 15°8 a. ; a+ ae By Dung (cake fed), 1904 and 1908 | 15°7 | 4177 | 19°4 | 4319 | 224 | 5362 | 2386 | 141 2 Unmanured np or 10'0 2417 |. 16°2 |°4025 14°3 3862 | 2261 | 12°0 | 3 Dung (cake fed), 1905 and 1909 9°5 §530 | 18°5 | 5497 14°2 6641 | 2921 | 142 | 4 y 1906 and 1910 11°4 2772 | 25°6 | 6489 16°9 4400 | 3502 | 1474 | 5 1907 and 1911 | 9'4_-| 2649 | 14°4 | 9407] 19:0 | 4208 | 2369 | 171 ml Shoddy, 1904 and 1908 ois 14:7 3656 | 21°0 | 4667 19°7 | 3969 | 2295 | 11-4 | 2 7 ~ 1905 and 1909 < abe 4365 | | 23°6 | 4550 16'3 4558 | 2387 | 11°6 | 3 Unmanured a Be at \« 10°6 2588 | 17°7 | 4334 i Ms ys | 3850 | 2561 ) LAF 4 | Shoddy, 1906 and 1910 ... | 10°7 | 2512 | 242 | 6231 | 19°11 | 4466 |;SSGIaieo 5 1907 and 1911 oo 10°3 2615 | 169 | 7495 | 22:2 5448 | 2560 | 14°7 | ; D 1 Guano, 1904 and 1908 ae 146 2550 | 20'1 | 4056 | 20°9 3608 | 1742 | 10°5 2 1905 and 1909 i 11°0 | 5176 | 19°7 | 4165 | 15°3 | GS345\ oie 3 be 1906 and 1910 »- 10°9 2857 | 256 | 4846 15°9 4053 | 5392 | 111 | 4 Unmanured ae 46 a3. 106 2985 | 18°7 | 4618 174 | 4510 | 2739 |} ais 5 | Guano, 1907 and loll. Fed ORE | 2680 | 17°4 | 7375 | 15°7. | 4014 | 2374 | 142 1 Rape Cake, 1904 and 1908 ... | 141 | 2674 | 17-8 | 3887] 19:7 | 3750 | 2180 | 10°7 2 1905 and 1909... 1) Dae 4185 | 17:9 4326 oa | 5203 | 2242 | 11°7 3 1906 and 1910... 9°5 | 2645 | 22°7 | 4584] 14°5 | 3866 | 3486 | 11°5 4 iB 1907 and 1911 ...| 10°5 | 2734 | 19°4 | 6619:§ 15°2 | 4661 | 2516 145 | 5 Unmanured Bee ox Seen Me Wie. 2769 | 19'5 | 4527 14°7 | 4155 | 2784 ie bbe aaa F 1 | Unmanured.. 11:7 | 3132 | 22.9 | 4749] 141 | 4814 | 3le6) 87 | | 2 | Superphosphate, 1904 and 1908 122 3025 23°2 | 5064} 169 | 4726 | 3223 | 109 | 3 ‘ 1905 and 1909 | 10°2 | 3949 | 23°6 | 4956 | 146 | 4975 | 2922 |) 107 | 4 1906 and 1910 9°7 3913 241 | 5419 16:0 5280 | 2682 | 12°8 | 5 1907 and 1911 9°7 | 4221 | 23°6 | 5698 |. 16°4 | 5641 | 3190 | 14:2 | Gl Bone Meal, 1904 and 1908... 129 3176 1.250. | 5205 16:7 4445 | 3345 99 2 1905 and 1909... 10°1 5656 | 22°1 | 5821 14:3 | 4922 | 3657) 9°9 | 3 Unmanured ee bes ss 10°2 3495 | 20°6 | 5491 Lai 4247 | 3701 9°2 4 Bone Meal, 1906 and 1910... Q°9 3450 226 6043 14°2 4711 | 3263 , 10°5 5 “4 1907 and 1911... 9°2 3525 | 22°71 | 6276 19°9 5286 | 3512+) §2°6- | I Basic Slag, 1904 and 1908... 118 4400 | 20°5 | 6285 13°8 | 4182 | 3564 | 115 ya ic 1905 and 1909... ~=—-10°4 | 4002) 213) 5030] 13°6 | 4530 | 3596 | 12°0 | 3 1906 and 1910... 9°4 | 3662 | 214 | 5860 | 13°6 | 4431 | S843) 125 | 4 # 1007 and 1911... Y"] 36241770 | 5816 14°4 3860 3804 | 12°0 5 Unmanured aN Eso., M.A., D.Sc), F.RS- : Sis). EL. 1 HOROLD, BART. . J. A. VOELCKER, EsoQ., M.A., Ph.D. SIR JULIUS WERNHER, BART. J. MARTIN WHITE, Eso. — eo aie eS ee ew ee COU mh CO —— —— P + ee VOL PAST IO WORT ot ‘ eis ed =. > h