Abstract
Experiment was carried out in 1952 on the varietal difference of the effect of high temp. upon the ripening period of soy-beans. Varieties used were Sango-wase (Kumamoto), Nakate-hadaka (Hokkaido), Kisaya (Kagoshima), Norin No. 2 (Ibaraki). Iwate Noi 2 (Iwate). Shiro-hachi'koku, (Yarnagata) & IVlejiro No. I (Fukushima). Sangowase & Kisaya are the veri(ties of short ripening period, Nakate-hadaka, Norin No. 2 and Shiro hachikoku are the varieties of middle ripening period a.nd lwate No. 2 and Mejiro No. I belongto the varieties of long ripening period. The plants were grown in soil by pot culture and half of them were grown in high temp. con dition(about 6'C higher than natural temp. cond.) during the period from blooming to maturity, and the rest were grown under the natural temp.condition. Moreover in both conditions, the natural day-length of 10 hrs day-length and 8 hrs day-length were maintained. The results obtained may be summarized as follows :
