53 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 24 34 12 



To cotton seed meal plot — 16 — 195 — 54 



To acid phosphate plot 56 — 130^153 



To cotton seed meal and acid phosphate plot 112 77 — 41 



Average increase with kainit 44 — 53 — 59 



Marengo County, 2 Miles South of Faunsdale, 



W. C. McKnight, 1905. (See Table, p. 54.) 



YelloioisU, gravelly, prairie upland. 



The largest increase and the only plot showing any decid- 

 ed profit from fertilizers was plot 10, which received 

 550 pounds of a complete fertilizer. 



Lbs. 



Average yield of seed cotton per acre, unfertilized 41i 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 62 



To acid phosphate plot 170 



To kainit plot 48 



To acid phosphate and kainit plot 210 



Average increase with cotton seed meal 122 



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



To unfertilized plot —82 



To cotton seed meal plot 56 



To kainit plot —42 



To cotton seed meal and kainit plot 120 



Average increase with acid phosphate 13 



Increase of seed cotton per acre when kainit was added : 



To unfertilized plot — 20 



To cotton seed meal plot 56 



To acid phosphate plot 20 



To cotton seed meal and acid phosphate plot 30 



Average increase with kainit 21 



