67 



Increase of seed cotton per acre when kainit was added: 



■To unfertilized plot 51 Ybs. 



To cottonseed meal plot 250 " 



To acid phosphate plot 53 " 



To cotto-niseed meal and acid phos. plot. . . .182 



Averasre increase with kaiuit 122 



»» 



In spite of the wide variation in the yields of the two 

 fertilized plots, there is suflScient evidence to prove that this 

 isoil was especially deficient in phosphoric acid, and that ni- 

 trogen and potash were also needed. In ISOG, when the 

 yield on the unfertilized plots was only about half that of 

 1897, nitrogen afforded the greatest increase in yield. 



GROUP n. POTASH MOST EFFECTIVE. 



Experiment Made by T. M. Borland, Doth an, Henry 



County. 



Soil sa?idi/ ; subsoil clay. 



This piney woods field had been in cultivation for eight 

 years, corn and cotton alternating. 



Cotton on all plots died prematurely, wh'ch the experi- 

 menter attributed, not to "rust," but to unusually hot 

 weather in the latter part of July. 



