MOVEMENT OF SOLUBLE SALTS 



123 



later was an inverted water bottle which was kept filled with 

 water. This maintained a constant level of water above the soil 

 in the top percolator. A bottle was kept below the bottom 

 percolator to catch all the water that passed through it. When 

 one bottle was filled with the drainage water another was put 

 in its place. 



Soluble 



<n each inch Section of So\( afTer J 7 Dau6 



Average 0? 3 ~^eaTmetiTs 



f> a.m /e,ooo 1.0,000 jo, 



7 poo 



SolTs in Pfm- ofDruS,,t 



The experiment was begun June llth and allowed to run 

 till September llth, a constant stream of water percolating 

 through the soils during the entire time. In all, about fifty 

 liters of water passed through the soil. This was caught in 

 sixteen bottles which held about three liters each. The soluble 

 salts were determined in each bottle separately. The results 

 are given in Table 3. 



The first leaching contained 651 parts per million of solids. 

 After this the salts dropped down to about 200 p. p. m. and 

 remained fairly constant during the remainder of the experi- 

 ment. The variations that occurred may have been due to 

 differences in temperature or other factors during the experi- 

 ment. 



The soil was allowed to remain in the percolators six months 

 after the leaching had been discontinued. The nitrates and sol- 

 uble salts were then determined in the soil of each percolator. 



