26 



Increase in yield from cottonseed, acid phospJtate, and kainit 

 on Experiment Station Farm in ISOS. ISUU and 1900. 



Increase; lbs. seed cotton 

 per acre. 



Increase of nerd cot'o)i in r acrr irJwre cotton 

 seed meal was added 



To unfertilized ])lot 



To acid phosphate plot 



To kainit plot 



To acid phosphate .-md kainit plot 



Average increase with cotton seed meal. 



Increase of seed cotton per acre ivliere phos- 

 phate was added 



To unfertilized plot 



To cotton seed meal plot 



To kainit plot . . 



To cotton seed meal and kainit plot 



Average increase with acid phosphate. . . 



Increase of seed cotton p^'r acre where kainit 

 ivas add^d 



To unfertilized i)lot 



To cotton seed meal plot 



To acid phosphate j)lot 



To cotton seed meal and acid phos. plot. . 



Average increase with kaiuit 



1898 



1899 



1900. 



Average, 

 3 years. 



Lbs. 

 35 

 187 

 134 

 219 



144 



178 

 132 

 364 



—7 



167 



122 

 315 

 308 

 176 



145 



—3 



-33 



54 



41 



—78 



194 



—24 



61 



Lbs. 

 161 

 147 

 181 

 115 



151 



38 



235 



262 

 31 



84 

 S8 



116 



46 

 145 

 100 

 132 



106 



82 



80 



102 



36 



82 



143 

 164 

 164 

 132 



152 



III 1898 the greatest increase in yield was obtained by 

 the use of a mixture of cotton seed meal and kainit. 

 This mixture was a close second to the complete ferti- 

 lizer in 1899 and 1900 and its average increase for the 

 three years lackc^l only 36 pounds of seed cotton per acre 

 of equalling the increase due to a complete fertilizer. 



Quite unexpectedly, acid phosphate has not been very 

 effective. If this is due to the accumulation of a suffi- 

 cient supply of phosphoric acid in the soil from the 

 phosphate applied annually for many years before the 



