抄録
Rice plants on the so-called fall droppen paddy field show low yielding efficiency. This experiments were done in three different plots, that is, normal paddy field: Ninomiya, semi fall droppen field: Tomioka, and the heavy fall droppen field: Idoori, Growth rate, increase of fresh and dry matter in unit area, and nitrogen %, total sugar% and crude ash% in plant samples of eyery plot were examined. It is recognized that the fall droppen phenomena in rice plants arise not only from earing stage, but from early vegetative stage in paddy field. The fall droppen phenomena is not peculiar, but it is due to the nutritious deficiency of the plant on the habitat
