33 



1907 1908, 



Lbs. Lbs. 



Average yield of seed cotton per acre, unfertilized 540 475 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 72 460 



To acid phosphate plot 856 880 



To kainit plote —120 190 



To acid phosphate and kainit plot 380 



Average increase with cotton seed meal 269 478 



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



To unfertilized plot 432 200 



To cotton seed meal plot 121 620 



To kainit plot — 120 



To cotton seed meal and kainit plot 70 



Average increase with acid phosphate 576 193 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 848 340 



To cotton seed meal plot; 656 70 



To acid phosphate plot 20 



To cotton seed meal and acid phoophate — 560—600 



Average increase with kainit 315 — 43 



Madison County, 5 Miles West of Huntsville. 



H. D. N. Wales, 1905. (See Table, p. 35.) 



Red soil, with red siibsoih 



This worn red lime soil responded freely only to applica- 

 tions of cotton seed meal. Other tests made in Madison 

 County indicate a general need on such soils for both nitro- 

 gen and phospahte. Results from potash have been varia- 

 ble, the majority of the tests showing that little or no pot- 

 ash is needed. 



