THE 



OHIO STATE UNIVERSITY 



BULLETIN 



Volume XXV January 20, 1921 Number 9 



CONTRIBUTIONS IN BOTANY NUMBER 117 



THE RELATION OF PLANT 



SUCCESSION TO CROP 



PRODUCTION 



A Contribution to Crop Ecology 



By 



ADOLPH E. WALLER, Ph. D. 



Instructor in Botany in 

 The Ohio State University 



Papers from the Department of Botany, Number 117 



PUBLISHED BY THE UNIVERSITY AT COLUMBUS 



Entered aa second-class matter November 17, 1905, at the post-office at Colambus, 

 Ohio, under Act of Congress, July 16, 1894. 



