VALUE OF SWAMP LANDS. 9 



the soil. Not only was the potash in the soil deficient as 

 compared with other soils but what there was present was 

 unavailable to plants. When the kainit was used as a 

 fertilizer the corn received what it needed, and gave a fair 

 crop even on this poorly drained soil. Take the average of 

 the two plots and the natural soil gave only 17.35 bushels 

 of sound corn and 11.50 bushels of poor corn. The average 



CORN GROWN ON SWAMP SOIL. 



NO POTASH ON LEFT. WITH POTASH ON RIGHT. 



Experiment Conducted by the Illinois Experiment Station. 



of the plots where kainit was used shows 58.1 bushels of 

 sound and 3.35 of poor corn. There can be no question 

 that this increase was due to the potash in the kainit. The 

 use of lime alone was not satisfactory. We see from the 

 table that what the soil needed was potash. The lime 

 could not furnish potash or set it free in the soil and thus it 

 failed to produce the crop. Not only is this so but you 



