52 



T. Lyttleton Lyon and James A. Bizzell 



The concentration of magnesium also was greater in the drainage water 

 from the limed soil than in that from the unlimed soil, as is to be expected 

 from the foregoing results. The data are given in table 35: 



TABLE 35. Magnesium in Drainage Water from Limed and from Unlimed Tanks 



Tanks 



3, 5, 6. 

 7, 9, 10 



4 



8 



Soil treatment 



Not limed, cropped 

 Limed, cropped . . . 

 Not limed, bare . . . 

 Limed, bare 



Magnesium 



(parts 

 per million) 



9.0 

 12.0 

 10.9 

 14.6 



Effect of lime and potassium sulfate on removal of magnesium 



The application of lime to the soil treated also with sulfate of potash 

 did not increase the quantity of magnesium in the drainage water, but 

 in the crops there was a slight increase, as shown in table 36: 



TABLE 36. Average Annual Removal of Magnesium from Limed and from Unlimed 



Tanks Treated with Sulfate of Potash 



(In pounds per acre) 



The removal of magnesium in the drainage water of these tanks was 

 very considerably greater than for those not treated with potassium 

 sulfate, and this fact may account for the failure of the lime to still further 

 increase the liberation of magnesium. 



The effect of the sulfate of potash applications was to increase the 

 removal of magnesium, as was the case with calcium. This is shown 

 by table 37: 



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