Food for 

 Plants 



72 



Yield of Cured Hay Under Different Rates 

 of Nitrogenous Fertilization. 



Yield of Cured Hay. Average 



.,. , r c J V A 1899, 1900, 1901, 1902, Yields 



Nitrate or Soda applied. tu tu tu Ti-'-n 



^^ Lbs. Lbs. Lbs. Lbs. in 1 ons. 



* 



None 5,075 4,000 3,290 2,950 I . 9 



150 lbs. per acre* 6,300 5,600 5,55° 4,850 2.8 



450 lbs. per acre* 6,913 8,200 9,390 8,200 4.1 



*.\mount slightly reduced in 1901 and 1902. 



V/h t the These figures show a uniform, consist- 



T-v. cu^ ent and marked advantage from the use of 



Nitrate Nitrogen; and the efi-ect of its 

 absence is shown by the steady decline of the yields on the 

 no-Nitrate plat from year to year. In each year the use of 



Rock before Blasting with One Pound of Forty Per Cent. Dynamite. 



150 pounds of Nitrate gave increased yields over the plat 

 without Nitrogen, the gain varying from 1,200 to almost 

 2,300 pounds, an average gain of about seven-eighths of a 

 ton of hay. Three times this amount of Nitrate did not, of 

 course, give three times as much hay, but it so materially 

 increased the yield as to show that it was all used to good 

 advantage except, perhaps, in the second year. This was 

 an exceptionally dry year and but one crop could be cut. 



