Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.1999.791.793Glycine max (L.) Merr.) Genotypes]]>Ullah ChaudhryAman Rashid GoheerM.A. 3199923A field experiment was conducted to determine the effect of seed size on soybean performance. Amongst the three genotypes under study, 95-1 gave highest average seed yield of 2065 kg ha1 followed by FS-85 which produced 1820 kg ha1. Williams-82 produced the lowest average seed yield of 1282 kg ha1, among the seed size categories, maximum average seed yield of 1991 kg ha1 was produced by medium (4.9 mm-6.2 mm) seed followed by an average produce of 1976 kg ha1 by large sized seed. Lowest produce (1171 kg ha1) was obtained from small size seed. Besides seed yield, the yield components like number of pods per plant, number of seeds per pod and number of seeds per plant were significantly affected both by genotypes and seed size. Similarly photo biomass producing contributors (number of plant, plant height, biological yield and harvest index) were also found responsive to genotypes and seed size categories. Genotypes also showed significant results regarding phenology but less pronounced results on phenology were shown by seed size. Quality of oil, however, was increased by large seed size which remained 22.40 percent.]]>AOAC.,198010th Edn.,Anonymous,19971997Bhardwaj, H.L. and A.S. Bhagsari,199017109113Hatim, M. and G.Q. Abbasi,19941994pp: 330-351pp: 330-351Kazmi, A.A., Farhatullah and Saeed-ul-Hassan,1991795103Kolak, I., R. Henneberg, S. Milas, J. Radosevic and Z. Satovic,199257519526Longer, D.E., E.J. Lorenz and J.T. Cothren,1986Glycine max (L.) Merrill] emergence under simulated soil crust conditions.]]>14371375Low, N.H.,19901990Rana, M.A. and M. Yousaf,198896771Reddy, P.N., K.N. Reddy, S.K. Rao and S.P. Singh,1989Glycine max (L.) Merrill).]]>17289295Shukla, A., Y.K. Sharma and M. Bargale,1987Vicia faba (L)) as compared to soybean (Glycine max L. Merrill) with special reference to their seed size.]]>24353357Steel, R.G.D. and J.H. Torrie,19842nd Edn.,pp: 172-177pp: 172-177Sung, F.J.M.,199220527532TeKrony, D.M., T. Bustamam, D.B. Egli and T.W. Pfeiffer,19872710401045