Quantitative Relationships of Carbon, 

 Phosphorus, and Nitrogen in Soils 



PRESENTED TO THE 



FACULTY OF THE UNIVERSITY OF ILLINOIS 



URBANA, ILLINOIS, U. S. A. 



AS A 



Thesis for the Degree of Doctor of Philosophy 



JUNE, 1909 

 BY 



%L. *"/ 



ROBERT STEWART, B. S. 



PUBLISHED BY 



THE UNIVERSITY OF ILLINOIS 



AGRICULTURAL EXPERIMENT STATION 



AS BULLETIN No. 145 



