17 



Increase of seed cotton per acre when kainit was 

 added : 



To unfertilized plot 38 lbs. 11 lbs. 



To cotton seed meal plot — 35 lbs. — 126 lbs. 



To acid phosphate plot — 54 lbs. — 35 lbs. 



To cotton seed meal and acid phosphate 



plot 231 lbs. 145 lbs. 



Average increase with l<ainit, - - 63 lbs. —I lb. 



Phosphate was the material of most importance for 

 the gray soil and it was also needed on the darker soil. 

 Cotton seed meal was first in importance in 1900 and 

 second in 1899. Kainit was useless except in a complete 

 fertilizer, in which combination it was slightly profit- 

 able, but never so important as phosphate or cotton seed 

 meal. 



Experiment Conducted by E. J. Daffin, 3 miles s. of 

 Tuscaloosa^ Tuscaloosa County. 



This test was made in 1900 on the F. S. Moody farm. 

 The soil is described as second bottom, sandy, and of a 

 reddish gTay color; the subsoil, as red clay. The origi- 

 nal growth, removed more than half a century ago, is 

 sweet gum, black gum, persimmon, and sassafras. The 



preceding crop Avas cotton. 



June and July brought an excessive rainfall, interfer- 

 ing with cultivation and August was very dry. There 

 were 1,065 plants per eighth-acre plot. "Ked rust" was 

 reported as injurious alike on all plots. 

 ••' Both cotton seed meal and acid phosphate, whether 

 used alone, or in any combination, greatly increased 

 the yield and afforded a good profit. Kainit was prac- 

 tically ineffective except in combination with the other 

 two fertilizers, where it seems to have increased the 

 yield to a profitable extent ; the complete fertilizer, con- 



