69 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 234 lbs. 



To cottonseed meal plot 245 " 



To acid phoisphate plot 214 " 



To cottonseed meal and acid phois. plot. . . .373 " 



Average increase with kainit 267 " 



In this test kainit stands ahead of the other two fertili- 

 zers in effectiveness, a large and rather uniform increase in 

 yield occarring on every plot where kainit was used. In a 

 complete fertilizer 200 pounds per acre of kainit proved 

 better than 100 pounds. 



The fact that acid phosphate was only moderately effect- 

 ive, and that cottonseed meal was oaly slightly beneficial, 

 is probably due to the extremely unfavorable season in July 

 and August. 



It remains uncertain whether the favorable effects of 

 kainit are here due to (1) a deficiency of potash in the soil; 

 (2) to the tendency of this fertilizer to increaise the water- 

 holding power of the soil, or (3) to the rust-restraining ten- 

 dency of kainit. The experimenter reported ho marked dif- 

 ference in amount of rust on kainit plots and those receiv- 

 ing no kainit. 



ExPERiMEXT Made ijy J. W. Dykes, Three and a Halk 



Miles West of Union Springs, Bullock County. 



Red soil, 5 inches deep ; subsoil red clay. 



The land had been in. cultivation thirteen years, cotton and 

 ^•orn alternating. The crop in 1896 was cotton. The origi- 

 nal forest growth was hickory, pest oak, sweetgum, etc. 

 This soil is reported as especially liable to ''blight and 

 rust," and these leaf diseases were very destructive in 1897, 

 especially on plots 1, 2, 3, 5 and 8, the only plots on which 

 DO kainit was used. 



Replying to a question relative to the extent of the shed- 

 ding on the different plots, the experimenter writes: "The 



