Vol. Xyi IVIARCH 31, 1919 No. 13 



JOURNAI> OF 



AGRICULTURAI/ 



RESEARCH 



CONTENTS AND INDEX 

 OF VOLUME XVI 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



^'^ASHINOTON, D. C. 



WASHINQTON S OOVERNMENT PRINTINQ OPFIOB I IMt 



