47 



Increase of seed cotton per acre wlien kainit was 

 added : 



To unfertilized plot . 106 lbs. 201 lbs. 



To cotton seed meal plot — 23 lbs. 238 lbs. 



To acid phosphate plot 125 lbs. 23 lbs. 



To cotton seed meal and acid phosphate 



plot 138 lbs. 84 lbs. 



Average increase with kainit, ... 87 lbs. 139 lbs. 



In l)oth experiments a complete fertilizer afforded the 

 largest increase in yield. A showing almost as favor- 

 able was made bv the mixture of cotton seed meal and 

 kainit. 



The slight benefit from cotton seed meal in 1900 is 

 probably due to the fact that peanuts were grown be- 

 tween the corn rows the year before. The experiment 

 of 1900 makes the fourth test of fertilizers on cotton 

 made on this farm. All these results point toward the 

 need of all three of the fertilizer materials tested, kainit 

 giving the largest average increase for the four years, 

 viz. : 168 pounds of seed cotton per acre per annum. A 

 similar average shows the increase with cotton seed meal 

 to be 134 pounds, and with phosphate to be 122 pounds. 



It is not surprising that this land, which has been 

 in cultivation less than 10 years should be less respon- 

 sive to cotton seed meal than are most of the soils of re- 

 gions that were settled earlier. It also seems less re- 

 sponsive to phosphate and more so to kainit than do 

 most of the soils on which tests have been made. 



