Lysimeter Experiments 



47 



The concentration of calcium was appreciably greater in the drainage 

 water from the limed than in that from the unUmed soil, both when 

 planted and when kept free of vegetation, as is shown in table 27 : 



TABLE 27. Calcium in Drainage Water from Limed and from Unlimed Tanks 



Tanks 



3, 5, 6 

 7, 9, 10 

 4 



Soil treatment 



Xot limed, cropped 

 Limed, cropped . . . 

 Not limed, bare . . . 

 Limed, bare 



Calcium 



(parts per 



million) 



43.8 

 50.4 

 63.8 

 74.9 



As somewhat less water percolated thru the limed soil than thru the 

 unlimed, it seems likely that the greater concentration of calcium in 

 the drainage water from the limed soil was due to that cause rather 

 than to any other. 



Effect of potassium sulfate on removal of calcium 



Tanks 11 and 12 were both treated with an application of 200 pounds 

 of sulfate of potash annually, but tank 11 was not limed while tank 12 

 received 3000 pounds of burnt lime in the spring of 1910 and again in 

 1914. Since the conditions were somewhat different from those previously 

 considered, the removal of calcium in crops and in drainage water is 

 here tabulated (table 28): 



TABLE 28. Average Annual Removal of Calcium from Limed and from Unlimed 



Tanks Treated with Sulfate of Potash 



(In pounds per acre) 



From these tanks also there was no greater removal of calcium from 

 the limed soil than from the unlimed. 



47 



