r 



FIELD AND LABOKATOR\ 



STUDIES OF SOILS 



A'N ELEMENTARY MANUAL 

 FOR STUDENTS OF AGRICULTURE 



BY 



A. Q. McCALL 



Professor of Agronomy, Ohio State Ufiiversity 



FIRST EDITION 



FIRST THOUSAND 



NEW YORK 



JOHN WILEY & SONS, Inc. 

 London: CHAPMAN & HALL, Limited 



1915 



