36 



Lbs. 



Average yield of seed cotton per acre, unfertilized 232 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 48 



7o acid phosphate plot 225 



To kainit plot 161 



To acid phosphate and kainit plot 285 



Average increase with cotton seed meal ISO 



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



To unfertilized plot 40 



To cotton seed meal plot 217 



To kainit plot 198 



To cotton seed meal and kainit plot 314 



Average increase with acid phosphate 192 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 21 



To cotton seed meal plot 142 



To acid phosphate plot 179 



To cotton seed meal and acid phosphate plot 239 



Average increase with kainit 145 



Morgan County, 4 Miles West of Hartselle. 



J. O. Burleson, 1907-8. (See Table, p. 35.) 



In 1907, soil, red, lime table land; Suhsoil, red. The orig- 

 inal growth was hickory^ removed about 80 years before. 



The soil was the ordinary lime soil of the Tennessee Val- 

 ley Eegion. A complete fertilizer afforded the largest 

 yield. Apparently the greatest need was for nitrogen. 

 Ill 1908, typical sandy mountain land, dark gray soil ivith 



red subsoil. 



The original growth was shortleaf pine and hardwoods, 

 and the land had been in cultivation about 10 years. The 

 largest increase was afforded by a mixture of cotton seed 

 meal and acid phosphate. The chemical chiefly needed by 

 this soil was acid phosphate. 



