FIELD CROPS 



BY 



A. D. WILSON 



SUPERINTENDENT OF INSTITUTES AND AGRICULTURAL 



EXTENSION, COLLEGE OF AGRICULTURE, 



UNIVERSITY OF MINNESOTA 



AND 



C. W. WARBURTON 



AGRONOMIST, BUREAU OF PLANT INDUSTRY, UNITED 

 STATES DEPARTMENT OF AGRICULTURE 



1912 



EBB PUBLISHING 



ST PAUL.MINN 



ONIVEKSITY OF CALIFORNIA 



T TTDO A 0V 



