Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2000.1274.1276AhmadS. YaseenM. SaboorA. 8200038Rice genotypes differed significantly in their growth response. Growth response in terms of paddy yield was influenced by P application, genotype and their interaction. Relative reduction in paddy yield ranged from none to 13%. The genotypes K. Basmati, NIAB-6, IRRI-6, Kernal, Basmati-370 and KSK-282 showed positive response to P application. Mostly genotypes with high P concentration had low P uptake, low phosphorus use efficiency and hence low paddy yield. NIAB-6 had used phosphorus efficiently at control P level. Rice genotypes NIAB-6, IRRI-6 and K. BASMATI were P responsive and productive and hence could be regarded as P-efficient rice genotypes. Phosphorus efficient genotypes could be grown under native or little P fertilizer application conditions.]]>Ahmad, N., M.T. Saleem and I.T. Twyford,19921992pp: 5992Chapman, H.D. and P.F. Pratt,1961Clark, R.B. and R.R. Duncan,199127219240Fageria, N.K. and M.P. Barabosa-Filho,19826146151Gourley, C.J.P., D.L. Allan, M.P. Russelle and P.R. Bloom,199357103110Iqbal, M.,19951995NFDC.,19981998Rajkhowa, D.J. and S.R. Baroova,199237781782Saric, M.R.,19813743766Siddique, M.,19981998Steel, R.G.D. and J.H. Torrie,19802nd Edn.,Pages: 633Pages: 633Zia, M.S., M. Aslam, Rahmatullah, M.B. Khan and A. Ali,199815159165Zia, M.S., M.A. Gill, M. Aslam and M.F. Hussain,1991113538