60 T. Lyttleton Lyon and James A. Bizzell 



TABLE 47. Potassium in Crops on Limed and on Unlimed Soil 

 (Annual average of four years) 



The indications, on the whole, are opposed to the conclusion that 

 potassium is liberated by the application of lime to this soil, when the 

 quantity used corresponds rouj2;hly to the lime requirement of the surface 

 eight inches as determined by the Veitch method. 



Effect of potassium sulfate on removal of potassium 



Potassium was unlike calcium and magnesium in that there was no 

 liberation of the former produced by the application of sulfate of potash, 

 as is evident from table 48: 



TABLE 48. Average Annual Removal of Potassium from Soil Treated and from 

 Soil not Treated with Sulfate of Potash 



(In pounds per acre) 



There are no significant differences in the figures for the removal of 

 potassium, either in the drainage water or in the crops, from these tanks. 

 It may be concluded that, while the applications of sulfate of potash 



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