no 



the two groups of salts is not due entirely to an effect the more 

 soluble salts may have had upon the solubilities of the other 

 three. 



FIG. 7. Showing the effect of capillarity on the mean distribution of water- 

 soluble salts in 6 soil types under an earth mulch of 3 inches. The NO 3 , 

 SO 4 and Cl curve is plotted on one-third the scale of the other three. 



BEARING OF CAPILLARY MOVEMENT OF SALTS UPON SOIL 



MANAGEMENT. 



CULTIVATION TO MAKE WATER-SOLUBLE PLANT FOOD MATERIALS- 

 MORE AVAILABLE. 



It is evident, from the tendencies of good earth mulches to 

 restrain the rise of water-soluble salts to the immediate surface 

 of the field, which has been demonstrated by the series of experi- 

 ments of the preceding section, that in so far as the presence- of 



