29-2 34-2 I5T> KiG 3320 3712 



G. A. CowiE 133 



Table VIII. Field Trials with Barhfi. Foster's Field, 1918. 

 Previous Crop — Wheat. 



Grain per acre. Straw per aero, Total produce 



Treatment bushels cwt. per acre, lbs. 



, « , , « , , ^^ , 



Plot A Plot B Plot A Plot B Plot A Plot B 



Control (No N) 14-9 24-2 10-5 13-3 2C00 2811 



1. Ammonium sulphate ... 27-4 34-5 14-4 17-2 3078 3807 



2. Cyanamide 305 284 15-9 1.5-7 3435 3299 



3. Cyanamide 9 part.s 

 Dioyanodiamido 1 part 



4. Cyanamide 1 part "1 



TV r J n . ^ 250 21-6 I3-4 123 2898 2509 



JJicyanodiamido 9 parts j 



Amount of N applied in I, 2, 3, 4 = that supplied in IJ cwt. ammonium sulphate. 



REFERENCES. 



(1) MoRRErx and BiTROEN. Jouriml of llie Chemical Societij, TransnHiotis, 105, 1, 

 1914. 576. 



2) Werner. Journal of the Chemical Society, Transactions, 107. 1, 1915, 7I."i. 



3) HoFMANN. Ber. d. Chem. Ges. Bd. 18, 2782, Bd. 19, 208(;. 



4) Baumann. Ber. d. Chem. (Jes. Bd. 7, 446. 



5) Bamberger. Ber. d. Chem. Ges. Bd. 16, 1074, Bd. 26, 159.3. 

 G) Rathke. Ber. d. Chem. Ges. Bd. 18, 3102. 



7) POHL. Chem. Ztg. Sepert. 1908, 321. Journ. f. praki. Chemie (2), 77, 533. 



8) Miyake. Journal of the American Chemical Society, 39, No. 11, 2378. 



9) Immendoeff. Filhlincjs Landw. Ztg. 1905, 787. 



0) Kappen. Cent, fur Bait. Abt. n, Bd. 22, 1909. 



1) Brenchley, Winifred E. '"Inorganic Plant Poisons and Stimulants." 

 Organic Plant Poison.?, Annals of Botany, 31, Ncs. 123 and 124, 32, No. 12(i. 



2) Gerlach and Wagner. Deutsche Landw. Presse, 1903, 367. 



3) Immendorff. Fiihlings Landw. Ztg. 1905, 792. 



(14) Seelhobst and Muther. Journal fur Landwirtschaft, Bd. 53, 1905, 349. 



(15) Perotti, R. Centralblatt fur Bald. Abt. n, Bd. 18, 1907, 55. 



(16) Ulpiani. Cent, fiir Bald. Abt. ii, Bd. 19, 1907, 337. 



(17) LoEW. Chem. Zeit. 1908, No. 57, 1909, No. 3. 



(18) Aso. Journal of the College of Agriculture, Tokyo, 1, 1909-13, 211. 



(19) Inouje. Journal of the College of Agriculture, Tokyo, 1, 1909-13, 193. 



(20) Stutzer and Reis. Journal fur Landw. Bd. 58, 1910, 73. 



(21) Brioux. Annates de la Science Agronomique, ni, Serie 5, Annee 1910, Tome 



I, 280. 



(22) Tbuninger. Chem. Zeit. 1916, 40, 812-813. 



(23) Pfeiffer and Simmermacher. Landw. Ver. St. Bd. 90, 415-430. 



(24) Voelckee, J. A. Journal of the Royal Agricultural Society, 11, 1916, 254; 



78, 1917, 237. 



(25) RD.SSELL, E. J. Journal of Agricultural Science, 6, 53. 



(26) Potter and Snyder. Journal Indus. Engin. Chem. 7, 221-226. 



