<![CDATA[The objective of this study was to determine the impact of phosphorous (P) fertilizer on soybean seed dry weight andseed quality during seed development. Four genotypes of soybean ie; G1=Willis, G2=Malabar, G3=KM-19 BE, andG4=Kipas Putih were planted in an experiment arranged in a completely randomized block design consisting of threerates of P fertilizer including P0=0 kg P2O5/ha, P1=25 kg P2O5/ha, P2=50 kg P2O5/ha were applied to every genotype.Beginning 20 days after flowering, fresh weight and dry weight of the seed were collected every five days while seedquality components were observed every teen days from each plot. Fresh and dry weight were plotted to the graphs andanalysis of variance were performed to seed quality. The results showed that the seed development was slow until 20 daysafter flowering (DAF) but both tend to steadily increase then until around 40 DAF and then started to levelling off until50 DAF. Seed viability and seed vigor remained low until 30 HSP and achieved reached maximum values at around 40to 50 DAF. Applying P fertilizer at a rate of 50 kg P2O5 per ha accelerated grain filling and increased the germination rateof the seed harvested at beginning 20 DAF to 40 DAF on every genotype. This result implied that genotypes respondeddifferently to fertilizer P as indicated by differences in seed weight and seed quality during seed development.Keywords : seed development, viability, vigor, soybean]]>
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