I9I9] 



ALWAY, MCDOLE, &■ TRUMBULL— SUBSOIL 



197 



For the period June 7-September 27, 1909, Shantz determined 

 the moisture content twice a day in a grama-buffalo grass associa- 

 tion, recording it in 6-inch sections to a depth of 3 ft. and in foot 

 sections through the succeeding 3 ft. From his data we find that 

 on August 7-8 and lo-ii the ratio of the moisture content to the 



TABLE VIII 

 Data from H. O. Ranxh in different years, rNCLUDiNG the favorable 



SEASONS OF 1907 AND I908 



hygroscopic coefficient in the 7-12 and 13-18 inch levels fell to 

 approximately i.o (10, p. 35); while from July 22 to September 9 

 the ratio at the latter depth was almost continuously much below 

 1.5. From August 7 to 13 the sixth foot, and to a less extent the 

 fifth, showed ratios close to i . o. In each of the 4 months included 

 in the study the rainfall was much above the normal for Akron, 

 the excess varying from 25 to more than 100 per cent (8), and 



