22 



Cottonseed meal apparently increased the yield of seed 



cotton per acre when added — 



Pounds. 



To unfertilized plots 310 



To kainit plot 9 



To acid phosphate plot 60 



To kainit and acid phosphate plot 8 b 



Average increase from cottonseed meal 116 



Kainit apparently increased the yield of seed cotton per 



acre when added — 



Pounds. 



To unfertilized plots 354 



To acid phosphate plot 115 



To cottonseed meal plot 53 



To acid phosphate and cottonseed meal plot 85 



Averag-e increase from kainit 151 



Acid phosphate apparently increased the yield of seed 



cotton per acre when added — 



Pounds. 



To unfertilized plots 60 



To kainit plot — 179 



To cottonseed meal plot — 190 



To kainit and cottonseed meal plot — 103 



Average decrease from acid phosphate 103 



The favorable effects of kainit and cottonseed meal and 

 the unfavorable effects of acid phosphate are probably not in- 

 dications that this soil is notably lacking in potash acd nitro- 

 gen and abundantly supplied with phosphoric acid. The most 

 profitable fertilizer in 1897 was the one which was best able to 

 fortify the plant against the attacks of the prevalent leaf dis- 

 ease. Under the weather conditions of ISiil kainit and cotton- 

 seed meal were best able to do this. Their favorable effect 

 was doubtless due largely to the fact that they tended to delay 

 maturity or to keep the plant growing longer than was the 

 case with acid phosphate. On the other hand, acid phosphate 



