71 



Lbs. 



Average yield of seed cotton per acre, unfertilized 464 



Increase of ?eed cotton when cotton seed meal was added: 



To unfertilized plot 288 



To acid phosphate plot 218 



To kainit plot 13 



To acid phosphate and kainit plot 290 



Average increase with cotton seed meal 196 



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



To unfertilized plot 192 



To cotton seed meal plot 122 



To kainit plot — 115 



To cotton seed meal and kainit plot 188 



Average increase tvith acid phosphate 97 



Increase of seed cotton per acre when kainit was added : 



To unfertilized plot 265 



To cotton seed meal plot — 36 



To acid phosphate plot — 42 



To cotton seed meal and acid phosphate plot 30 



Average increase with kainit 54 



Henry County. 3 1-2 Miles North of Columbia. 

 Thos. Z. Atkeson, Columbia^ 1908. 



Light gray soil loith yellow loamy subsoil. 



The field had been cleared about 40 years, the principal 

 growth having been long leaf pine. There was very little 

 rain from the time the seed were planted, and cotton wilt 

 and root knot further reduced the yield under these unfavor- 

 able conditions. All fertilizers increased the yield, but none 

 to any large extent. 



Yet the increase on plot 5 was sufficient to pay a fair 

 profit over the cost of the fertilizer. 



