Feb. II. 1918 Freezing-Point Method and Soil Solution 



373 



5^s>ls or Z2.'A moisturl) 



5IWKS TVHL FBOM 

 MAT\. PLANTING. 



(E>A.51t> OF 22% mOlSTUREL) 



lOWKS IZWK5 I6WKS Z4W1<:5 



JULIT JUL3I AUGZe. OCT. 30 



5EWK5 40WKS 

 DEC. 26 FtM9 



5IWKS TIME. fROn 

 f-WYT PLANT IN O 



Fig. 2.— Graphs of the depressions of the freezing point in soils 3 and 4, with and without crop. 



