52 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 101 lbs 



To Cottonseed meal plot 247 " 



To acid phoisphate plot 109 " 



To cottonseed meal and acid plios. plot. ... 94 " 



Ayerage increase with kainit 13S ** 



Phosphoric acid was the fertilizer constituent most ur- 

 gently needed by thisisoil. Nitrogen was moderately effect- 

 ive. The most profitable fertilizer wais a mixture of 200 

 pounds per acre of cottonseed meal, 240 pounds of acid 

 phosphate and 100 pounds of kainit. The favorable effect 

 of acid phosphate on the soil in this vicinity was shown in 

 1889 in an experiment made by Mr. A. V. Albright, of Tusca- 

 loosa county. (See Bui. 12 of this station.) 



Experiment Made isy J. W. Jarrett, ^ Mile South op Stek- 



KETT, Shelby County. 

 Soil gray ; very shallow ; slaty subsoil. 



This field was fresh land, cleared o'nly three years before, 

 and had produced only corn prior to the time of this experi- 

 ment. The soil is described as good cotton land, but as not 

 very retentive of either water or fertilizers. There was no 

 rust. The weather was dry. 



