抄録
1. Observations were made on blooming and dropping of flowers and young pods of soy bean plants. 2. Rate of planting, soil moisture, and thinning young buds seeded to have no marked effects on dropping of flowers and pods, so far as the present experiment showed. 3. Soy bean plants cultivated in foot path of paddy fields (Azemame) showed smaller rate or flower and the pod dropping as compared with those grown on upland fields by usual practice. The cause for the difference in dropping may be atributed to the difference in the microclimatic environment. 4. A pronounced decrease in dropping rate was observed in plots under short day. The decrease, however, does not seem to be due to photoperiodism alone; it seemed highly probable to be due to the complex of photoperiodism, temperature, and humidity factors, although further experiments should be necessary before conclusion.
