GOGKLEBUR 



.ALBERT A. EL\NSEN 



Agronomist, Office of Forage-Crop Investigations 



UMTED STATES DEPARTMENT OF AGRICULTURE 

 DEPARTMENT CIRCUU\R 109 



Contribution from the Bureau of Plant Industry 



( Office of Forage-Crop Investigations ) 



WM. A. TAYLOR, Chief 



Washington, D. C. July, 1920 



WASHINGTON : GOVERNMENT PRINTING OFFICE : IMO 



