46 



a loss of 76 pounds from the use of kainit. Acid phosphate 

 used alone gave a net profit of $9.44 per acre, or 562 per cent 

 on the investment in fertilizers. The mixture of phosphate and 

 cotton seed meal gave a profit of $9.40 per acre, or 201 per cent 

 on the investment in fertilizers. 



Nitrate of soda applied June 24 was more effective than was 

 cotton seed meal. 



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



To unfertilized plot 232 lbs. 



To acid phosphate plot 80 lbs. 



To kainit plot 72 lbs. 



To acid phosphate and kainit plot — 32 lbs. 



Average increase with cotton seed meal 88 lbs. 



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



To unfertilized plot 360 lbs. 



To cotton seed meal plot 208 lbs. 



To kainit plot 216 lbs. 



To cotton seed meal and kainit plot 112 lbs. 



Average increase with acid phosphate 224 lbs. 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 64 lbs. 



To cotton seed meal plot — 96 lbs. 



To acid phosphate plot — 80 lbs. 



To cotton seed meal and acid phosphate plot — 192 lbs. 



Average increase with kainit — 76 lbs. 



