Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2000.989.990Helianthus annuus L.)]]>GhaniAbdul HussainDr. Mumtaz Anwar-ul-Hassan 6200036The interactive effect of nitrogen and water stress on leaf area of sunflower (Helianthus annuus L.) was studied in Pots. Nitrogen and sporadic stress was induced by a cycle of ten-days watering and ten-days stress period after 20, 30, 40 and 50 days of sowing. Data revealed that the sporadic stress and nitrogen had highly significant response. When either the stress period was increased or nitrogen level decreased, the leaf area significantly decreased. The highest leaf area values were recorded with full dose of nitrogen, intermediate with 1/3rd dose and the lowest with 1/8th dose of nitrogen at all sporadic stress levels.]]>Akhtar, M., M. Zubair, M. Saeed and R. Ahmad,1993Helianthus annuus L.).]]>307376Carleton, A.E. and W.H. Foote,19655602603Jamro, G.H. and A.S. Larik,1991Glycine max L.]]>31926Karamanos, A.J., J. Elston and R.M. Wadsworth,1982Vicia faba L.) in the field: Water potentials and laminar expansion.]]>49815826Menzel, C.M., D.R. Simpson and A.J. Dowling,198629239249Monayeri, M.O., A.M. Hegazi, N.H. Ezzat, H.M. Saleem and S.M. Thoun,198420807807Palmer, S.J., D.M. Berridge, A.J.S. McDonald and W.J. Davies,1996Helianthus annuus L.) by nitrogen nutrition.]]>47359368Sarwar, M., N. Ahmed, G. Nabi and M. Yasin,199112275280Steel, R.G.D. and J.H. Torrie,19802nd Edn.,Pages: 633Pages: 633Wolfe, D.W., D.W. Henderson, T.C. Hasiao and A. Alvino,198880865870