50 



Chilton County^ 1-2 Mile tSouxH of Verbena. 

 G. H. Caffby, 1907-S. (See Table, p. 4J9.) 



Rather stiff, dark, sandy soil, ivith a red clay sahsoll. 



This piece of high upland was cleared 60 or 70 years ago 

 of its original growth of longleaf pine, oak, hickory, and dog- 

 wood. The results for the two years suggest that the fer- 

 tilizer which pays best one season is not necessarily the one 

 most effective in a different season. In 1907 there Avas need 

 for a complete fertilizer, in which the most effective con- 

 stituent was nitrogen, closely followed by potash; phosphate 

 was also helpful when used in combination, with hoth of 

 the other constituents. 



In 1908, on the contrary, kainit was of practically no value 

 nitrogen being most important, followed by phosphate. A 

 mixture of cotton seed meal anfl "'-ospliate gave the greatest 

 profit. 



In 1907 the complete fertilizer on plot 9, costing |o.6S pei' 

 acre, increased the yield of seed cotton by 464 pounds per 

 acre, worth at 3.2 cents. $14.85. This leaves a net profit of 

 S8.17 due to the complete fertilizer. Likewise in 1908 the 

 increase on plot 5. with meal and phosphate costing $4.28, 

 afforded a net profit of $5.96. 



1907 1908 

 Lbs. Lbs. 



Average yield of seed cotton unfertilized ^•5'^ 580 



Increase of seed cotton when cotton seed meal was added: 



to unfertilized plot 144 160 



To acid phosphate plot 2^8 240 



To kainit plot 18 130 



To acid phosphate and kainit plot 861 200 



Average increase with cotton seed meal 198 183 



