A Study, by the Crop Survey Method, of 



Factors Influencing the Yield 



of Potatoes 



A THESIS 



PRESENTED TO THE FACULTY OF THE GRADUATE SCHOOL OF 



CORNELL UNIVERSITY FOR THE DEGREE OF 



DOCTOR OF PHILOSOPHY 



BY 



EARLE VOLCARTJHARDENBURG 



Published as Memoir 57 

 Cornell University Agricultural Experiment Station, June 1922. 



517499 



