34 



profit, namely, $10.48 per acre, or 215 per cent on the invest- 

 ment in fertilizers. 



Increase of seed cotton per acre when cotton seed meal was added: 



To unfertilized plot 184 lbs. 



To acid phosphate plot 112 lbs. 



To kainit plot 176 lbs. 



To acid phosphate and kainit plot 284 lbs. 



Average increase with cotton seed meal 189 lbs. 



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



To unfertilized plot 160 lbs. 



To cotton seed meal plot 88 lbs. 



To kainit plot 60 lbs. 



To cotton seed meal and kainit plot 168 lbs. 



Average increase witii acid phosphate 119 lbs. 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 64 lbs. 



To cotton seed meal plot 56 lbs. 



To acid phosphate plot — 36 lbs. 



To cotton seed meal and acid phosphate plot 136 lbs. 



Average increase with kainit 55 lbs. 



Increase from use of different quantities of kainit: 



From use of 200 pounds kainit 136 lbs. 



From use of 100 pounds kainit 92 lbs. 



Increase from use of cotton seed meal 284 lbs. 



Increase from use of nitrate of soda 400 lbs. 



Nitrate better by 116 lbs. 



