40 



Increase of seed cotton per acre when kainit was 

 added : 



To unfertilized plot 13 lbs. 



To cotton seed meal plot Tl lbs. 



To acid phosphate plot — 44 lbs. 



To cotton seed meal and acid phospliate ph)t. . . — 50 lbs. 



Average increase with kainit — 3 lbs. 



Experiment made un the farm of the South East 

 Alabama Agricultural School, Jack- 

 son^ Clarke County. 



Stiffs dark red, or ''mulatto'^ soil; subsoil, red clay. 



The experiment of 1899 w^as conducted by J. L. Bal- 

 lard, that of 1900 by Prof. J. W. Culver. The field con- 

 sisted of upland, cleared at least 10 years before the ex- 

 periment began of its growth of long leaf and short leaf 

 pine and oak. The land used for the experiment of 1900 

 had hen pastured for two years. No report was made 

 of crops preceding the experiment of 1900. 



The results of the two experiments may be found in 

 the table on page 42 and in the analysis of that table 

 given below. 



In 1899 phosphate w^as by far the most effective fer- 

 tilizer, though both cotton seed meal and kainit, as w^ell 

 as phosphate, were profitable when employed in a com- 

 plete fertilizer. 



In 1900, on ground not fertilized for several years 

 previous to the experiment, all three fertilizing materials 

 w^ere exceedingly effective, all being of practically equal 

 importance. This soil is unusually responsive to com- 

 mercial fertilizers. A complete fertilizer afforded much 

 the largest profit, both in 1899 and 1900. 



