102 



age of leaves which were shed prematurely as a result of 

 rust: 



. Plot 1 (cottonseed meal) 50^ 



Plot 2 (acid phosphate) 33j^ 



Plot 3 (no fertilizer) 75^ 



■Plot 4 (kainit) 00^ 



Plot 5 (meal and phosphate) 20^ 



Plot 6 (meal and kainit) 00^ 



Plot 7 (phosphate and kainit) 00^ 



. Plot 8 (no fertilizer) .60^ 



Plot 9 (meal, phosphate and kainit) 00^ 



Plot 10 (meal, phosiphate and kainit) 1^ 



Here both 100 and 200 pounds per acre of kainit effect- 

 ually checked rust. 



Above we have the reports which show a decided rust- 

 restraining effect of kainit. 



Five experiments, as follows, show that kainit, under 

 their prevailing local conditions, failed to reduce the injury 

 from leaf diseases. At Tuskaloosa the amount of rust was 

 as great on the kainit plots as on any others. ThLs field 

 had been subsoiled by following the turn plow with a 

 scooter. At Abbeville there was apparently no uniform 

 effect on rust due to kainit. At Prattville "plot 1 was worse 

 affected, and commenced to drop the leaves about five or 

 six days sooner than the others. All the rest dropped the 

 leaves about the same time." 



At Jackson rust was detected only on plot 1 (cotto-nseed 

 meal) and plot 3 (unfertilized). At Greensboro there was 

 some rust on all plots, but no marked difference. 



It is evident from the preceding paragraphs that kainit 

 did check leaf diseases in eight of the thirteen experiments 

 affording definite data. This is equal to 61 per cent, of fa- 

 vorable results. 



It is not strange that the effect of kainit on rust was wide- 

 ly different under different conditions of soil and weather. 



