Lysimeter Experiments 



63 



The concentration of sodium in the drainage water also was somewhat 

 less for the limed soil than for the unlimed, as is shown in table 52: 



TABLE 52. Sodium in Drainage Water from Limed and from Unlimed Tanks 



The difference in concentration of the drainage water from the limed 

 and the unlimed planted soil was slight, but in the drainage water from 

 the unplanted soil there was a notably more dilute solution in the Hmed 

 soil, as was also the case with potassium. 



Effect of potassium sulfate on removal of sodium 



The effect of the application of sulfate of potash fertilizer on the removal 

 of sodium, as shown in table 53, was not exactly the same as that on 

 the removal of any of the other bases: 



TABLE 53. Average Annual Removal of Sodium from Soil Treated and from 

 Soil Not Treated with Sulfate of Potash 



(In pounds per acre) 



Tanks 



3, 5, 6. 



11. . .. 

 7, 9, 10 



12. . .. 



Soil treatment 



No lime, no K2SO4 

 No lime, K2S04 . . . 

 Lime, no K2SO4 . . . 

 Lime, K2SO4 



Sodium removed in 



Drainage 

 water 



83.5 

 84.1 

 73.4 

 79.8 



Crops 



9.5 

 6.5 

 8.6 

 6.3 



Total 

 sodium 

 removed 



93.0 

 90.6 

 82.0 

 86.1 



The table shows that there was a shght liberation of sodium in the drain- 

 age water as the result of the fertilizer applications, but this was less than 

 the liberation of calcium or of magnesium (tables 29 and 37). Where 



63 



