Lysimeter Experiments 81 



Magnesium was found in much smaller quantity in the drainage water 

 than was calcium. Its removal was decreased by cropping. Application 

 of lime resulted in a liberation of magnesium, as indicated by its greater 

 removal in the drainage water. Applications of sulfate of potash also 

 increased the removal of magnesium in the drainage water. 



The calcium-magnesium ratio was much wider in the drainage water 

 than in the soil, owing to the greater solubility of the calcium over that 

 of the magnesium. The application of lime, by making the magnesium 

 more soluble, narrowed the calcium-magnesium ratio in the drainage 

 water. 



Potassium was removed in smaller quantity by the drainage water 

 than by the crops, in which respect it differed from calcium, magnesium, 

 and sodium. The application of lime did not result in increase in the quan- 

 tity of potassium contained in the drainage water, nor in any increase in 

 the amount of potassium removed by the crops. Applications of sulfate 

 of potash did not cause increase in the removal of potassium in the drain- 

 age water. 



Sodium was taken up in small amounts by crops, but was removed 

 in larger quantity in the drainage water than was either magnesium 

 or potassium. Application of lime decreased the removal of sodium 

 both by crops and in the drainage water. 



The removal of sulfur in the drainage water was from three to six times 

 as great as in the crops. There was about as much carried off by the 

 drainage water from the unplanted soil as by both drainage water and 

 crops from the planted soil. The application of lime was accompanied 

 by an increase in the quantity of sulfur in the drainage water. Of the 

 sulfur added to the soil in the form of sulfate of potash, more than half 

 was removed in the drainage. 



There has never been more than a trace of phosphorus in the drainage 

 water from any of these tanks. There appears to have been no relation 

 between the lime applications and the quantities of phosphorus removed 

 in the crops. 



6 8i 



