Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.1999.1623.1625MaqsoodMuhammad AhmadShakeel AhmadAamir IrshadM. 4199924The present study was undertaken to determine a suitable growth stage of maize crop for the application of nitrogen fertilizer for maximising yield and yield components of maize under agro-climatic conditions of Faisalabad. Maximum grain yield (5.27 t ha1) alongwith highest harvest index (37.00%) per hectare was obtained for the crop raised by split N fertilization i.e. 1/3 at sowing + 1/3 at lst irrigation + 1/3 at flowering and lowest grain yield (2.93 t ha1) and harvest index (23.50%) in control.]]>Anonymous,19971997Bangarwa, A.S., M.S. Kairon and K.P. Singh,199858854856Gaur, B.L., P.R. Mansion and D.C. Gupta,199237816817Gautam, O.P., Y. Singh and V.H. Shah,19649110Gill, M.A.,19781978Hussain, W.N.,19911991Schmitt, M.A. and R.H. Beck,19914546550Steel, R.G.D. and J.H. Torrie,19842nd Edn.,Tiwary, S., M.N. Shahani and R.D. Singh,197044397400