48 



1905 1906 1907 1908 

 Lbs. Lbs. Lbs. Lbs. 

 Average yield of seed cotton per acre unfer- 

 tilized 40S 256 &58 550 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 38.4 101 64 230 



To acid phosphate plot 104 85 60 142 



To kainit plot 96 21 —36 —18 



To acid phosphate and kainit plot 272 62 279 256 



Average increase with cotton seed meal 214 68 60 153 



Increase of seed cotton per acre when acid phosphate was added: 



To unfertilized plot 168 128 32 50 



To cotton seed meal plot —112 109 156 —38 



To kainit plot 16 36—101—142 



To cotton seed meal and kainit plot 192 77 214 132 



Average increase with acid phosphate 66 87 75 1 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 136 206 158 186 



To cotton seed meal plot —152 123 186—62 



To acid phosphate plot —16 114 25 —6 



To cotton seed meal and acid phosphate plot . .152 91 244 108 



Average increase with kainit 30 133 153 57 



