OUT-DOOR PLANT FOR POT AND SUNKEN CYLINDER CULTURES, IMPERIAL CENTRAL AGRICUL- 
TURAL EXPERIMENT STATION, NISHIGAHARA, TOKYO, JAPAN. 
212 
In foreground, sunken galvanized iron cylinders, used for fertilizer experiments with upland-cultures. 
Similar cylinders made of terra-cotta are sunken in paddy-fields for experiments with wet-land rice. 
