24 



The Bulletin 



Table II- 



Results in Field B 



Number 

 * of 

 Plat 



Fertilizer Application Per Acre 



bO 

 O 



Ph 



' ft.'" 



■ o 

 ^■ 

 PmO 



(77 



o 



ipLi 



12 



11 



13 



14 



15 



34.6 Pounds 13% Blood HN: 



; 150 Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt K= 



69.2 Pounds 13% Blood N= 



1 150 Pounds 14% Acid Phosphate F 



22.5 Pounds 20% Manure Salt K= 



Unfertilized 0= 



fl38.4 Pounds 13% Blood 2 N= 



1 150 Pounds 14% Acid Phosphate P 



22.5 Pounds 20% Manure Salt.. K 



('207.6 Pounds 13% Blood 3 N= 



! 150 Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt K= 



4.5 



18 



21 



4.5 



21 



21 



27 



21 



O 



o 



PL, 





4.5 



Yield in Bushels of 

 Shelled Corn Per Acre 



1906 1908 1909 Ave 



4.5 



4.5 



15.1 



19.3 

 16.6 

 23.1 



29.8 



17.1 



19.0 

 15.1 

 25.1 



29.8 



16.1 



19.2 



15.85 



24.1 



29.8 



Average Results for Seven Years 



82-7-13 



22-11-12 



IMO-U 



3^12-14 



42-13-15 



Unfertilized O- 



34.6 Pounds 13% Blood.. H N=!4.5 



150 Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt K=|..-. 



21 



69.2 

 1 150 



22.5 

 [138.4 

 1150 



22.5 

 [207.6 

 150 



Pounds 13% Blood -N=i 



Pounds 14% Acid Phosphate P=i 



Pounds 20% Manure Salt K= 



Pounds 13% Blood 2 N= 



Pounds 14% Acid Phosphate P 



Pounds 20% Manure Salt R 



Pounds 13% Blood 3 N= 



Pounds 14% Acid Phosphate P= 



22.5 Pounds 20% Manure Salt. 



.K= 



18 



21 



27 



21 



21 



4.5 



4.5 



4.5 



4.5 



[Ave. 



-I 



23.3 

 22.6 



25.5 



29.9 



37.5 



Effect of Varying Quantities of ISTitrogen. 



The experiments in table 2 were planned to test the effect on yield of 

 com and stover of varying quantities of nitrogen leaving the phosphoric 

 and potash constant. 



On one plat the nitrogen was reduced to one-half the normal quan- 

 tity, making the application 41/2 pounds of nitrogen per acre, or practi- 

 cally 11/2 per cent in the fertilizer mixture. On two of the plats it was 

 increased by two and three times the normal quantity (9 pounds per 

 acre), making the application 18 and 27 pounds per acre, respectively^ 

 or on the four plats 4I/2, 9, 18, and 27 pounds of nitrogen per acre. 



