59 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 168 lbs. 



To cottoniseed meal plot 184 " 



To acid phosphate plot — 54 " 



To cotton.seed meal and acid phois. plot. . — 144 " 



Average increase with kainit 3il " 



The chief need of this soil was for phosphoric acid. Ni- 

 trogen was decidedly more beneficial than kainit. 



These results accord with Mr. McGregor's experiment in 

 1896. 



The greatest profit from fertilizers, |9.82 per acre, was 

 obtained by a mixture of acid phosphate and cottonseed 

 meal. 



Experiment Made by George O. Sellers, Lumber Mill, 



Butler County. 

 Gray, sandy soil, 10 inches deep ; red clay subsoil. 



This field, on which the original growth had been yellow 

 pine and blackjack oak, had been cleared eleven yeare be- 

 fore. 



The season was dry until the middle of August, when 

 there occurred ten dayg of rainy weather, favoring rust. 

 which caused shedding of leaves on all plots where no kain- 

 it was need. The stand ie reported as uniform. 



