MAIZE RESPONSE TO TIME AND RATE OF NITROGEN APPLICATION

To find out effective use of nitrogen (N) in autumn planted maize (Zea mays L.) hybrid, a field experiment was conducted during 2009 at Agronomic Research Area, University of Agriculture, Faisalabad. Three N split application timings depending upon various development stages were kept in main plots and five rates of N; N-1 (100 kg ha(-1)), N-2 (150 kg ha(-1)), N-3 (200 kg ha(-1)), N-4 (250 kg ha(-1)) and N-5 (300 kg ha(-1)) were randomized in sub plots. Results revealed that maximum plant growth, number of kernels per cob (419) and grain yield (8.27 t ha(-1)) were recorded in N-4 treatment. Contrary maximum days to maturity (103.3 days) and biological yield (16.56 t ha(-1)) were recorded in N-5 treatment. Based on the results, it was concluded that application of N in three split (at V2, V16 and R1 stage) @ 250 kg ha(-1) can be recommended for achieving optimum grain yield under semi arid environment of Pakistan.