PORTO RICO AGRICULTURAL EXPERIMENT STATION, 
D. W. MAY, Agronomist in Charge, 
Mayaguez, P. R. 
BULLETIN No. 27. 
Under the supervision of the STATES RELATIONS SERVICE, 
Office of Experiment Stations, U. S. Department of Agriculture. 
YAM CULTURE IN PORTO RICO. 
BY 
C. F. KINMAN, Horticulturist. 
Issued May 24, 1921. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1921. 
