1915. 



PUBLIC DOCUMENT — No. 31. 



31a 



Average Yields per Acre, 1914 {Oat Say). 



Plots. 



Limed 

 (Pounds). 



Unlimed 

 (Pounds). 



Average 

 (Pounds). 



Nitrate of soda, 1 and 2, 

 Dried blood, 3 and 10, 

 Sulfate of ammonia, 5, 6 and S, 

 No nitrogen, 4, 7 and 9, 

 Manure, 0, ... 



4,350 

 3,550 

 3,533 

 2,533 

 3,200 



2,700 

 2,500 

 2,107 

 1,433 

 2,100 



3,525 

 3,025 

 2,850 

 1,983 

 2,650 



These figures show that the application of lime increased the 

 yield on each plot. 



On the basis of 100 for nitrate of soda, the relative standing 

 of the different nitrogen plots and no-nitrogen plots, as measured 

 by total yield during the past season, was as follows : — 



Oat Hay 

 (Per Cent.). 



Nitrate of soda. 



Dried blood, . 



Sulfate of ammonia. 



Manure, 



No nitrogen, . 



100.00 

 85.81 

 80.85 

 75.18 

 56.25 



The relative standing of the different materials as indicated 

 by total yield for the twenty-five years during which the experi- 

 ment has continued is as follows : — 



Per Cent. 



Nitrate of soda, 100.00 



Manure, 93.53 



Dried blood, 93.21 



Sulfate of ammonia, . . . . . . . . .88.38 



No nitrogen, 72.35 



On the basis of increase as compared with the no-nitrogen 

 plots the relative standing for the different fertilizers for the 

 twenty-five years is as follows : — 



Per Cent. 



Nitrate of soda, 100.00 



Manure 76.60 



Dried blood, 75.44 



Sulfate of ammonia, 57.97 



