59 



Increase of seed cotton per acre when aci<i phosphate was added: 



To unfertilized plot — 34 lbs. 



To cotton seed meal plot 219 lbs. 



To acid phosphate plot 114 lbs. 



To cotton seed meal and acid phosphate plot ..103 lbs. 



Average increase with kainit 100 lbs. 



Exi'KUiMENT Made by C. A. Hatchkr, Two Miles Southeast 

 OF Exterprise. Coffee County. 



(Irai/. sandi/ louin, icith stiff (jray siihsoil. 



The longk'af pines had been cut on this field about 18 

 years before. There were 7.360 plants per acre on all plots. 

 For yields and increase see table on page 60. The crop 

 preceding the experiment was corn with cowpeas in the 

 drill and peanuts between the corn rows. It is not stated 

 whether the peanuts were consumed as usual by hogs on 

 the land, or removed. 



In spite of these preceding leguminous crops and of the 

 fact that the corn had been fertilized with eight bushels of 

 cotton seed per acre, the application of cotton seed meal to 

 cotton was decidedly profitable. The material most needed 

 was acid phosphate. The greatest increase in yield, 616 

 ] fMinds of seed cotton worth $16.01 net, resulted from 

 the use of 640 pounds of a complete fertilizer, and this 

 complete fertilizer afforded a net profitof $10.63 per acre. 



Kainit was distinctly advantageous and profitable when- 

 ever combined Avith acid phosphate. The complete fertilizer 

 combining 200 pounds of kainit was more profitable thaa 

 the one with 100 pounds. 



No mention is made of rust. 



