26 



The Bulletin 



The other three applications were also made at a loss. In the case of 

 Field B the three times normal application shows the hest return, the 

 yield of corn being 29.8 bushels, and the profit $2.21, over the cost of 

 fertilizer, on the basis of com alone and $6.06 on the basis of corn and 

 stover. As an average for the seven years, 4^/2 and 9 pounds of nitro- 

 gen per acre (I/2 normal and normal) were applied at a loss; 18 pounds 

 barely paid for itself; but 27 pounds (three times normal) gave a profit 

 of $4.63. 



TABLE III— RESULTS OF FERTILIZER EXPERIMENTS WITH CORN— 



Results in ' ' Old Field " 



69.2 Pounds 13% Blood N= 



5* -{75 Pounds 14% Acid Phosphate }41?= 



22,5 Pounds 20% Manure Salt K= 



69.2 Pounds 13% Blood N= 



P -{150 Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt K= 



69.2 Pounds 13% Blood N= 



62 -^300 Pounds 14% Acid Phosphate 2 P= 



22.5 Pounds 20% Manure Salt K= 



69.2 Pounds 13% Blood N= 



72 -(450 Pounds 14% Acid Phosphate ...3 P= 



j [ 22.5 Pounds 20% Manure Salt K= 



8« I Unfertilized .0= 



27.4 35.6 



28.6 



36.4 



26.9 37.5 



22.9 

 22.9 



35.8 

 29.9 



31.5 



32.5 



32.2 



29.35 

 26.4 



Results in Field A 



1905 1907 1909 



Ave. 



69.2 Pounds 13% Blood.. N= 



1« -I 75 Pounds 14% Acid Phosphate }^P= 



[ 22.5 Pounds 20% Manure Salt K= 



Unfertilized. O^ 



69.2 Pounds 13% Blood N= 



10 i 150 Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt. K= 



69.2 Pounds 13% Blood. N= 



22 -^300 Pounds 14% Acid Phosphate 2 P= 



22.5 Pounds 20% Manure Salt K= 



69.2 Pounds 13% Blood.. N= 



32 -1 450 Pounds 14% Acid Phosphate 3 P= 



22.5 Pounds 20% Manure Salt K= 



72 Unfertilized 0= 



10.5 



21 



42 



63 



17.8 24.4 



4.5 



4.5 



4.5 



4.5 



27.3 

 23.6 



17.6 



32.5 



27.3 



17.2 29.6 



12.8 

 13.0 



31.2 20.2 



11.2 



17.2 



18.3 



24.26 



25.0 



18.7 



21.3 



