摘要：Plant density and nitrogen (N) are important factors which influence crop's growth regime. An experiment was planned to study two landraces of sweet corn (Zea mays saccharata) viz. Mansehra (MNS) and Swabi (SWB) in comparison to the local maize (Zea mays L.) cultivar (cv. Azam). The treatments also included four N levels along with four plant densities. The trial was performed at two locations; at the New Developmental Farm (NDF), University of Agriculture Peshawar, and at Cereal Crops Research Institute (CCRI), Pirsabak. Treatments significantly affected days to silking, plant height, crop growth rate (CGR) and absolute growth rate (AGR) of sweet corn. Landrace SWB, silked late with higher plant height, AGR and CGR. N-fertilization significantly increased plant height (31 %), AGR (25 %), and CGR (26 %) as compared to control (0-N). Increase in plant density increased plant height (5 %) and CGR (64 %), while AGR decreased by 6 % under highest density.
