Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2000.1239.1241Zea mays L.)]]>AyubM. ChoudhryM. Adil TanveerAsif AminM.M.Z. AhmadImtiaz 8200038The effect of different NP sources viz., urea + single super phosphate (SSP), Ammonium nitrate (AN) + SSP, ammonium sulphate (AS) + SSP, Urea + Triple super phosphate (TSP), AN + TSP and AS + TSP on the growth and grain yield of maize was studied in the Agronomic Research Area, University of Agriculture, Faisalabad during the year 1997. A quadruplicated experiment was arranged in a randomized complete block design measuring a net plot size of 3m × 8m. The combination of ammonium sulphate and single super phosphate produced significantly higher plant height, leaf area plant1 and grain yield (5.41 t ha1) than all other combinations. The increased yield was mainly associated with higher 1000-grain weight. Number of cobs plant1 and number of grain rows cob1 were statistically similar in all combinations of NP sources. The combination of AS + SSP seems to be the most suitable one for obtaining higher grain yield of maize in Faisalabad conditions.]]>Anonymous,1998pp: 72pp: 72Khan, M.A.,19681968Muirhead, W.A., F.M. Melhuish and R.J.G. White,1985697109Osiname, O.A. and R.A. Sobulo,1985623337Raghuram, K., T.A. Singh and N.K. Vatsa,1977294043Singh, R.S.,198415373374Steel, R.G.D. and J.H. Torrie,19842nd Edn.,pp: 172-177pp: 172-177Thiagalingam, K. and N. Atanasi,199554516521Watson, C.J.,1987116978Yibirin, H., J.W. Johnson and D. Eckert,199660512518Zafar, M.,1996Zea mays L.).]]>1996Zia, M.S., M.A. Gill, M. Aslam and M.F. Hussain,1991113538