The purpose of this study was to make clear the effect of soil heaping at the lower part of stem on bud-, flower- and pod-shedding in soy-bean plant. The results obtained were summarized as follows : (1) Percentages of the total of bud-, flower- and pod-shedding in the plots of no-, one time-, and three times-heaping were 55.2, 51.1, and 44.9 %, respectively. The peak of the time of flower-and pod-shedding in the flowers which bloomed in period from flowering time to two weeks later was delayed by soil heaping. (2) The number of pods per plant at ripening time was increased by such treatment, especially with three times soil heaping, so yield of seeds was the highest in the plant heaped three times and the lowest in control plant.
展开▼
