<;.s 



Bullock County^ 9 Miles East op Union Springs. 

 A. M. Cope, 1906. (See Table, p. 69.) 



Gray sandy soil ivith porous yellow sandy subsoil. 



The original growth of short-leaf pine had been cleared 

 many years before. The stand of cotton was very uniform 

 There was need of a complete fertilizer. Of the two com- 

 plete fertilizers the one containing the larger amount of 

 kainit per acre was more profitable. The need for nitrogen 

 and for phosphate was somewhat greater than for potash. 



The increase from the complete fertilizer on plot 9 was 

 760 pounds per acre, thus affording a net profit of .flS.6t 

 above the cost of fertilizer and above the cost of picking th>? 

 increase. Indeed every fertilizer, whether used singly or in 

 any combination whatsoever, gave a profitable increase. 



Lbs. 



Average yield of seed cotton per acre, unfertilized 240 



Increase of seed cotton per acre when cotton seed meal was ad- 

 ded: 



To unfertilized plot 256 



To acid phosphate plot 232 



To kainit plot 240 



To acid phosphate and kainit plot 400 



Average increase with cotton seed meal 282 



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



-ro unfertilized plot 288 



To cotton seed meal plot 264 



To kainit plot 168 



To cotton seed meal and kainit plot 328 



Average increase with acid phosphate 262 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 192 



To cotton seed meal plot 176 



To acid phosphate plot 72 



To cotton seed meal and acid phosphate plot 240 



Avrerage increase with kainit 170 



