GO 



ceding that of 1905 were cotton, fertilized with 200 pounds 

 of guano per acre. 



In 1905 cotton rust was severe and a complete fertilizer 

 was most profitable, (plot 9 and 10) ; this year every fer- 

 tilizer, whether applied alone, by twos, or all three together, 

 greatly increased the yield. 



In 1906 the test was conducted on land that had been in 

 oats the year before. This was a rainy season on this farm. 

 Plot 10, with a complete fertilizer gave the largest increase 

 and greatest profit, while plot 9, receving a complete fer- 

 tilizer with double this amount of potash, dropped lower 

 in yield. There is no question of the effectiveness of phos- 

 phate and meal. But the results with kainit are here con- 

 tradictory, this fertilizer making a satisfactory increase 

 when used alone and also when used in the complete fer- 

 tilizer on plot 10: but in other combinations kainit failed 

 to increase the vield to anv notable extent. 



1905 1906 

 Lbs. Lbs. 



Average yield of seed cotton per acre, unfertilized 500 621 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 320 127 



To acid phosphate plot 128 104 



To kainit plot 40 — 26 



To acid phosphate and kainit plot 160 88 



Average increase ivith cotton seed meal . 162 73 



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



To unfertilized plot 264 189 



To cotton seed meal plot 72 166 



To kainit plot 16 —35 



To cotton seed meal and kainit plot 136 79 



Average increase tvith acid phosphate 122 100' 



Increase of seed cotton per acre when kainit was added : 



To unfertilized plot 336 224 



To cotton seed meal plot 56 71 



To acid phosphate plot 88 



To cotton seed meal and acid phosphate plot 120 — 16 



Average increase with kainit 150 70 



