100 



Total water-soluble salts in upper 18 inches of soil at commence- 

 ment of trials and the amounts added with the ivater, expressed 

 in pounds multiplied by 1.000,000. 



DISTRIBUTION OF SALTS IX MULCHED AND UXMLTLCHED SOILS 

 AFTER A CAPILLARY MOVEMENT OF 70 DAYS. 



In removing the soil from these cylinders at the close of the 

 trials the upper 3 inches were taken out in 1-inch layers, but 

 the balance, down to and including 18 inches, in 3-inch layers. 

 The lower 6 inches of soil in the cylinders were not examined. 



In the table which follows are given the amounts of the dif- 

 ferent water-soluble salts recovered from the cylinders carry- 

 ing the different soil types under the mulched and unmulched 

 conditions. These observations were made during the season of 

 1902, before the methods for the determination of bases had 

 been devised, and hence only the movement of the negative 

 radicles was observed : 



