13 



fertlizer on plot 10, which afforded a profit of $18.30 per acre, 

 or 341 per cent on the cost of fertilizers. 



The average estimated increase of seed cotton per acre 

 where cotton seed meal was applied was 122 pounds ; 210 

 pounds for acid phosphate, and 30 pounds for kainit. Nitrate 

 of soda applied July 3 was less effective than was cotton seed 

 meal. One hundred pounds of kainit was better than a larger 

 amount. 



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



To unfertilized plot 200 lbs. 



To acid phosphate plot 40 lbs. 



To kainit plot 80 lbs. 



To acid phosphate and kainit plot 168 lbs. 



Average increase with cotton seed meal 122 lbs. 



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



To unfertilized plot 200 lbs. 



To cotton seed meal plot 40 lbs. 



To kainit plot 256 lbs. 



To cotton seed meal and kainit plot 344 lbs. 



Average increase with acid phosphate 210 lbs. 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 000 lbs. 



To cotton seed meal plot — 120 lbs. 



To acid phosphate plot 56 lbs. 



To cotton seed meal and acid phosphate plot 184 lbs. 



Average increase with kainit 30 lbs. 



Increase from use of different quantities of kainit: 



To use of 200 pounds kainit 184 lbs. 



To use of 100 pounds kainit 500 lbs. 



