130 HATCH EXPERIMENT STATION. [Jan. 



The phosphatic slag, Mona guano, South Carolina phos- 

 phate and Florida phosphate were applied at the rate of 850 

 pounds per acre ; dissolved bone-black at the rate of 500 

 pounds per acre. Nitrate of soda was applied at the rate of 

 250 pounds per acre and potash-magnesia sulphate at the 

 rate of 390 pounds per acre. 



Potatoes were raised upon the plats in 1890 ; in 1891 

 winter wheat was employed (for details see ninth annual 

 report) ; in 1892 serradella was the crop experimented with 

 (see tenth annual report) ; and in 1893 a variety of Dent 

 corn, Pride of the North (see eleventh annual report). 



1894. — During the preceding season it was decided to 

 ascertain the after-effect of the phosphoric acid applied 

 during previous years by excluding it from the fertilizer 

 applied. In addition, to secure the full effect of the phos- 

 phoric acid stored up, the potassium oxide and nitrogen 

 were increased one-half, as compared with preceding seasons. 

 A grain crop (barley) calling for a liberal amount of phos- 

 phoric acid was chosen for the trial. The field was ploughed 

 April 17, the fertilizer being applied broadcast April 20, 

 and harrowed in. Below is given a statement of fertilizer 

 applied : — 



„.,,.,„, _„ , ,, I 64 i pounds of nitrate of soda. 



Plat 1(6,494 square feet) | 87 pounds of potash-magnesia sulphate. 



r>i . , c Ka . _ . «„ t , ( 651 pounds of nitrate of soda. 



Plat 2(6,560 square feet), j 88 pounds of potash-magnesia sulphate. 



r>i * q /« «"c - ,„_ t „.n \ 66 pounds of nitrate of soda. 



Plat 3 (6,606 square feet) j g9 £ ounds f potash-magnesia sulphate. 



r>i * a /c tat „„ ,„,„ <•„„*% ( 66 i pounds of nitrate of soda. 



Plat 4 (6,707 square feet), j 90 pounds of potash-magnesia sulphate. 



t>,„. - , A --a „ . ., I 674 pounds of nitrate of soda. 



Plat 5 (6,778 square feet) • | 90> pounds of potash-magnesia sulphate. 



Yield of Crop (1894). 



Plats. 



Plat 1, 

 Plat 2, 

 Plat 3, 

 Plat 4, 

 Plat 5, 



Grain and 



Straw 

 (Pounds). 



490 

 405 

 290 

 460 



Grain 

 (Pounds). 



169 

 148 

 78 

 144 

 118 



Straw and 



Chaff 

 (Pounds). 



221 

 251 

 212 

 216 



272 



Percentage 

 of Grain. 



34.49 

 34.07 



26.89 

 31.30 

 30.26 



Percentage 

 of Straw. 



65.51 

 65.93 

 73.11 



68.70 

 69.74 



