THE EFFECT OF DRYING SOILS ON THE 

 WATER-SOLUBLE CONSTITUENTS 



^//./^i.. 



Ir 



■X 



A THESIS 



PRESENTED TO THE FACULTY OF THE GRADUATE SCHOOL 

 OF CORNELL UNIVERSITY FOR THE DEGREE OF 



DOCTOR OF PHILOSOPHY 



BY 



A. F. GU5TAFSON, M.S. 



SEPTEMBER, 1920 



Reprinted from Soli Science, Vol. 13. No. 3. March, 1922. 



