Abstract
Field experiment was carried out at the Department of Millets, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu during kharif 2019 to study the response of pre-release late maturity maize hybrids to different planting densities and NPK levels and their interactions. The experiment was laid out in a split-split plot design. In the main plot two planting densities viz D1: 60 cm x 25 cm and D2: 60 cm x 20 cm and in the sub-plot, two nutrient levels viz N1: 100 per cent RDF (200:65:80 NPK kg/ha) and N2: 150 per cent RDF (300:97.5:120 NPK kg/ha) and in the sub-subplot, two hybrids viz G1: ADV 1390064 and G2: CMH 08-287 were tried. Based on the results of two years of experimentation, it was concluded that among the late maturity maize hybrids, G1 (ADV 1390064) was found to be the promising hybrid under 60 cm x 20 cm spacing with 100 per cent RDF (200:65:80 NPK kg/ha) which recorded higher grain yield (9,595 kg/ha), net return (Rs 94,704/ha) and B-C ratio (2.51).
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