202 



MOVEMENTS OF SALTS IN THE SOIL 



After standing undisturbed for a week, 1 20 grams of water 

 were placed on the surface of the soil, and the same application 

 of water was continued daily till the end of the experiment. 

 Each day about 1 20 grams of drainage water were collected, 

 and examined for chlorides. No pump being used, nearly 

 twenty- four hours were required for the percolation of 120 

 grams of water. The results of the analysis of the successive 

 drainage waters are shown in Table XXXIII. 



TABLE XXXIII 



COMPOSITION OF DRAINAGE WATER AFTER CHLORIDE OF 

 SODIUM HAD BEEN APPLIED TO THE SOIL 



It appears from the facts mentioned in the table that the 

 chloride of sodium commenced to appear in the drainage 

 water after 480 grams of water had been applied to the soil. 

 It is evident at once that the chloride of sodium must have 



