18 



HATCH EXPEEIMENT STATION. 



[Jan. 



The materials supplied to plats 1 and 3 would furnish 

 per acre the quantities of nitrogen, phosphoric acid and 

 l)otash found in 1,200 pounds of fertilizer having the aver- 

 age composition of the " special " corn fertilizers upon the 

 market at the time the experiment was commenced, viz., 

 1891. The average price per plat for 300 pounds of such 

 fertilizer (the amount needed per plat to equal the above 

 materials) is about $5.25. 



The yields the past year are shown below : — 



Plat 1, "special" fertilizer: stover, 935 pounds; ear corn, 1,110 



pounds. 

 Plat 2, fertilizer richer in potash: stover, 995 pounds; ear corn, 



1,030 pounds. 

 Plats, " special " fertilizer : stover, 790 pounds ; ear corn, 1,135 



pounds. 

 Plat 4, fertilizer richer in potash: stover, 865 pounds; ear corn, 



1,065 pounds. 



Computed to the acre and the grain in bushels, the 

 averages are : " special," stover, 3,450 pounds ; grain, 56.1 

 l)ushels ; fertilizer richer in potash, stover, 3,720 pounds; 

 grain, 52.4 bushels. It will be noticed that the " special" 

 fertilizer gives rather more grain and less stover than the 

 fertilizer richer in potash. This result is in entire accord 

 with the results of previous years, and the indications are 

 strong, therefore, that our mixture " richer in potash " needs 

 modification to make it equal in grain-producing power to 

 the "special" fertilizer for coiUinuous corn culture. It is 



