29 



Increase of seed cotton per acre when kainit was 



added : 



To unfertilized plot 183 lbs. 79 lbs. 



To cotton seed naeal plot 27 lbs. 107 lbs. 



To acid phosphate plot 33 lbs. 66 lbs. 



To cotton seed meal and acid phosphate 



plot —85 lbs. lib. 



« 



Average increase with kainit 39 lbs. 63 lbs. 



The figures for the two years agree closely and show 

 that a larger increase was afforded by cotton seed meal 

 than by any other single material. The most profitable 

 of all the fertilizers was a mixture of cotton seed meal 

 and phosphate. Kainit was unprofitable. 



Experiment Conducted by Judge T. J. Thomason, 2 



MILES SOUTH OF EaNBURNE (NEAR KAYLOR)^ 



Kandolph County. 



This experiment was made in 1899 on gray land, with 

 yellow subsoil. The soil is described as table land rather 

 retentive of moisture. The preceding crop was cotton. 



This is the third experiment on a uniform plan con- 

 ducted by Judge Thomason. (See Bulletin No. 107; p. 

 274) . If we take the average increase of each fertilizer 

 under all conditions we have for the entire period of 

 three years an average increase of 187 pounds of seed 

 cotton per acre attributable to cotton seed meal, 197 to 

 phosphate, and only 31 to kainit. The inference is plain 

 that a mixture of cotton seed meal and phosphate was- 

 all that cotton needed on this soil, and that the addi- 

 tion of kainit, at the rate of 200 pounds per acre, was 

 usually unprofitable. The results for 1899, when kainit 

 afforded a slight profit, were more favorable to potash 

 than Avere the results of the two previous tests on this- 

 soil. 



