34 



The Bulletin 



''Old" Field and Field B show larger yields where one-half the normal 

 application of potash was used. The average increase for the three 

 years on Field A, however, shows a larger increase and also profit 

 from the application of three times the normal amount of potash. The 

 indications are that Plat 12, Field B, is naturally more fertile than those 



TABLE v.— RESULTS OF FERTILIZER EXPERIMENTS WITH CORN— 



Results in "Old Field" 



Number 



of 



Plat 



Fertilizer Application Per Acre 



bD 



a 



■5 ir! 



o 

 - S ° 



PL, Ph 



Yield in Bushels of 

 Shelled Corn Per Acre 



1903 



1904 



1909 Ave 



82 

 IP 



12 



122 

 132 



142 



Unfertilized 



34.6 Pounds 

 75 Pounds 

 11.2 Pounds 

 69.2 Pounds 



150 Pounds 



22.5 Pounds 



103.8 Pounds 



225 Pounds 



33.7 Pounds 

 138 .4 Pounds 

 300 Pounds 



45 Pounds 

 207 .6 Pounds 

 450 Pounds 



67.5 Pounds 



.0=.... 

 ^=4.5 



13% Blood i^N 



14% Acid Phosphate ^B 



20% Manure Salt ^R 



13% Blood.... N: 



14% Acid Phosphate P 



20% Manure Salt R 



13% Blood 1HN=13.5 



14% Acid Phosphate—- .-1J^P= 



20% Manure Salt... IJ^R 



13%, Blood 12 N: 



14% Acid Phosphate 2 P: 



20% Manure Salt 2 K- 



13% Blood 3 N: 



14% Acid Phosphate 3 P 



20% Manure Salt 3 K= 



10.5 



2.2 



21 



4.5 



31.5 



6.7 



18 



42 



27 



63 



22.9 

 22.5 



28.6 



25.7 



25.6 



20.8 



29.9 



28.8 I 



36.4 

 37.0 

 40.8 

 32.9 



13.5 



26.4 

 25.7 



32.5 



31.35 



.i33.2 



26.85 



Results in Field A 



1905 



1907 



1909 



Ave. 



72 

 7 



10 



82 



92 



102 



83 



11» 



Unfertilized O^ 



Unfertilized 0= 



69.2 Pounds 13% Blood N= 



1 150 Pounds 14% Acid Phosphate .P= 



22.5 Pounds 20% Manure Salt K= 



[103.8 Pounds 13% Blood 1>^N= 



1 225 Pounds 14% Acid Phosphate 1}'2P= 



33.7 Pounds 20% Manure Salt VAK= 



[138.4 Pounds 13% Blood 2 N= 



1300 Pounds 14% Acid Phosphate 2 P= 



45 Pounds 20% Manure Salt 2 K= 



[207.6 Pounds 13% Blood 3 N= 



{450 Pounds 14% Acid Phosphate '.- 3 P= 



67.5 Pounds 20% Manure Salt 3 K= 



Unfertilized 0= 



f 34.6 Pounds 13% Blood }^N= 



75 Pounds 14% Acid Phosphate KP= 



I 11.2 Pounds 20% Manure Salt \iK= 



21 



13.5 



31.5 



18 



42 



27 



63 



45 



10.5 



4.5 



6.7 



13.5 



2.2 



23.4 

 27.3 



23.6 



29.0 



28.0 



28.7 

 23.1 

 22.0 



26.5 

 32.5 



31.2 



29.3 



34.3 



35.0 

 25.9 

 27.1 



12.0 

 13.0 



20.2 



24.1 



29.0 



29.7 

 18.6 

 25.3 



20.6 

 24.26 



25.0 



27.46 



30.4 



31.13 

 22.5 



24.8 



