抄録
The plant growth of soy-bean at the seedling stage is influenced by the size of seed, and the after effects of seed size continue for the whole life when the seed is planted on a poor field or the early variety is used. The plant growth is affected by cutting-off treatment of the seed before seeding. But there is no differences in the growth and yield ability between the large and the small seeds when the former is cut off to the same size as the latter.The influence of cutting-off cotyledons after germination is as follows: i) The earlier the cutting time or the beeper the part cut off, the more evitent the effect; ii) The nutritive function of the cotyledons continues at least for 5 days after germination.
