Abstract: The flowering and fruiting progress of Zogsia japonica Stend. has been studied in southernShandong Province and northern Jiangsu Province,where late June was believed to be the optimal collection period of the caryopsis.It was found that the unit weight of the caryopsis(x)could be used anidex to evaluate the percentage of filled seeds in them (y),i.e.,Y=0. 36x-94 (r= 0. 68). The Percentages of filled seeds, 45 % in 1991 and 50% in 1992, were raised up to 90% and 98%, respectively, by flotation and winnowing.Alkali scarification with either 20% NaOH for 20 min. or 20%KOH for 40 min.was very effective to overcome the impermeability of the pericarp.Viability of seedsamples tested with 1 % TTC solution for 24h.,where only the completely stained embryos were considered as viable,was very close to their germination Percent.