Abstract
This experiment was carried out in order to ascertain the after-effect of temperature and daylength treatment, given during the seed-ripening period of soybean, on the plant growth and yield in the following generation and also to clarify its ecological significance. It was carried out on the Kanto-Tosan Agricultural Experiment Station, Ministry of Agriculture and Forestry. The seeds exposed to the different temperature and day-length treatrr]ent during their ripening period were sown in 1953. The results obtained may be summarized as follows : 1. Seeds obtained from the different treatments were q'u:ite different in size and weight. In experiment of series X, seeds to be sown were selected for seed weight so as seeds of almost same weight were used throughout all the plots, iri. order to eliminate the effect of different weight of seeds. In series Y on the other hand seeds of representatlve (mean) weight of each plots were used respectively.
