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Macon County^ 9 Miles West of Tuskegee. 

 Yancey Swearington, 1906. (See Table, p. Gl.) 



Gray sandy soil loith yelloio loam subsoil. 



This field was cleared of its growth of long leaf pine 

 about GO years ago. The stand was good on all plots. It 

 is notable that the complete fertilizer on plot 6 nearly quad- 

 rupled the yield on the unfertilized plots. This complete 

 fertilizer afforded the largest .yield and the greatest profit. 

 but was closely followed in yield and profit by plot 6, receiy- 

 ing a mixture of cotton seed meal and kainit. In this test 

 kainit was the most useful single fertilizer, a fact which 

 was probably due to its effect in restraining rust, as indi- 

 cated by Mr. Swearington's careful obseryations. By July 

 3 plot 5 was ruined by rust. Plots 4 and 6 suffered least 

 from rust and were the last to show it. The rust was con- 

 sidered worse on plots 9 and 10 than on plot 5. Apparently 

 rust was worse and earlier on plots receiying phosphate. 



Mr. Swearington draws the following conclusion from 

 this test : 



"Our lands need more li])eral use of potash." 



Lbs. 



Average yield of seed cotton per acre, unfertilized 220 



Increase of seed cotton per acre when cotton seed meal was ad- 

 ded: 



To unfertilized plot 40 



To acid phosphate plot 196 



To kainit plot 221 



To acid phosphate and kainit plot 184 



Average increase with cotton seed meal 160 



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



To unfertilized plot 48 



To cotton seed meal plot 204 



To kainit plot 91 



To cotton seed meal and kainit plot 54 



Average increase ivith acid phosphate 99 



