Abstract
(1) As the planting distance of soy-bean from the rice stand, becomes greater, the former shows better growing and ripening condition. However, on the contrary, rice shows poor conditions both in growing and ripening. There was not a difference on ripening and growing of soy-bean on both "the east-west ridge "and" the south-north ridge". (2) Soy-bean planting on the ridge affected rice crops only little in the 3rd row of the latter, but distinct effects were observed in the 1st and 2nd row of rice in the experimental plots with 6", 8" and 10" of distance. (3) From the standpoint of yleld, nutrients and income raised from soy-bean cultivation, it is presumed profitable to grow soy-dean on the ridge of paddy-field, since decreasbd rice yield would be met by income from soy-bean.
