196 



Physics of the Soil. 



creeping. From the subsoiled area 8 inches of the surface 

 were removed, the subsoil spaded to a depth of 13 inches 

 more, and the soil returned to its place. After taking 



FIG. 60. Method of demonstrating the influence of subsoiling on soil 



moisture. 



samples from the five places indicated by the dots, 1.36 

 inches of water were gradually sprinkled over the two 

 areas on June llth and they were allowed to remain cov- 

 ered until the 15th, when samples were again taken. The 

 changes in the water content of the soil in the two areas 

 are shown in the table which follows: 



Table showing the ability of sub-soiled ground to hold water 

 against gravity. 



