Abstract
This investigation has been undertaken to learn the influence of temperature on the germination of Japanese crop seeds. In the present paper, however, only results obtained with rice seeds are described. Others will be reported later. The investigation shows that the minimun temperature for the germination of rice seeds is about 10°C., the optimum 34°C and the maximum 42°-44°C. In the germination of rice seeds in water, as has aleady been reported by many in vestigators, the plumule is the first part of the seed to emerge from the seed-coat develops later. In this investigation it has been observed that the optimum temperature for the development of the root is 30°-32°C., which is 2°-4°C. lower than that for the plumule.
