62 



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



To unfertilized plot 200 lbs. 



To cotton seed meal plot 300 lbs. 



To kainit plot 140 lbs. 



To cotton seed meal and kainit plot 193 lbs. 



Average increase with acid phosphate 208 lbs. 



Increase of seed cotton per acre when kainit was added: 



1 o unfertilized plot 70 lbs. 



To cotton seed meal plot 227 lbs. 



To acid phosphate plot 10 lbs. 



To cotton seed meal and acid phosphate plot . . 20 lbs. 



Average increase with kainit 81 lbs. 



Experiment Made in 1901, by G. L. McLure^ Two Miles 

 East of Garland^ Butler County. 



This gray upland pine soil had been cleared about ten 

 years. The original growth was longleaf pine and black 

 jat'k oak. The preceding crop was oats. Acid phosphate 

 was highly profitable and cotton seed meal effective. Kainit 

 was effective only when combined with the other two. The 

 largest increase, 560 pounds of seed cotton per acre, was 

 obtained from the use of a complete fertilizer. This, on 

 plot 9, gave a net profit of |9.4G per acre. For yield see 

 table on page 60. 



Two experiments previously made by Mr. McLure and 

 two made near by at Lumber Mills, accord with the results 

 here recorded in showing that the pineywoods soils of that 

 region are highly responsive to a mixture of acid phosphate 

 and cotton seed meal, and that kainit is highly beneficial 

 onlv when rust is severe. 



