42 



Marion County^ Hamiltoon. 



Sixth District Agricultural School, 1906. (Table, p. 30.) 



Sandy land loith yellow clay suhsoil. 



For 3 or 4 years preceeding the experiment this land 

 had been uncultivated and occupied by weeds. 



The largest and most profitable yield was afforded by 

 plot 5, fertilized with cotton seed meal and acid phosphate. 

 A test made on the same farm in 1903 (Ala. Station Bul- 

 letin No. 131) showed a need for a complete fertilizer, in 

 which, however, potash was less effective than either nitro- 

 gen or phosphate. 



Lbs. 



Average yield of seed cotton per acre, unfertilized 272 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 32 



To acid phosphate plot 298 



To kainit plot 131 



To acid phosphate and kainit plot 42 



Average increase with cotton seed meal 126 



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



To unfertilized plot : 64 



To cotton seed meal plot 330 



To kainit plot 213 



To cotton seed meal and kainit plot 124 



Average increase with acid phosphate 133 



Increase of seed cotton per acre when kainit was added: 



Averge yield of seed cotton per acre, unfertilized 397 



To unfertilized plot 49 



To cotton seed meal plot 148 



To acid phosphate plot 198 



To cotton seed meal and acid phosphate plot — 58 



Average increase with kainit 84 



