44 



Walker County, 3 Miles South of Cordova. 



G. L. Alexander, 1908. (See Table, p. 39.) 



Gray sandy upland with red clay sulsoil. 



This field had been cleared for about 40 years. Evidently 

 the land had been kept in a high state of fertility. 



The stand was nniform. 



It is clear that the chief need of this soil was for acid 

 phosphate. There was no need for potash. The figures for 

 nitrogen are confusing, probably due to the relatively pro- 

 ductive condition of this land. Apparently plot 10 was on 

 richer soil than the otlier plots. 



Average yield of seed cotton per acre, unfertilized 1165 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 320 



To acid phosphate plot — 80 



To acid phosphate and kainit plot — &0 



Average increase rvith cotton seed meal 54 



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



To unfertilized plot 420 



To cotton seed meal plot 20 



To kainit plot 330 



Average increase with acid phosphate 257 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot • 120 



To acid phosphate plot 30 



To cotton seed meal and acid phosphate plot 30 



Average increase v'tiJi kaivi'-. 



60 



