A TEXT BOOK 



OF THE 



PHYSICS OF AGRICULTURE 



BY 



F. H. KING 



Formerly Professor of Agricultural Phys/cs In the University of Wisconsin 



Author of "The Soil;" "Irrigation and Drainage;" "Principles and 

 Movements of Ground Water" 



FOURTH EDITION. 



MADISON, Wis. 

 PUBLISHED BY THE AUTHOR 



1907 



All rights reserved 



