Abstract

A field experiment was conducted during the rainy season of 1996 and 1997 on a shallow typic ustochrept to evaluate the response to N and plant density requirements for CNH, 36 upland cotton (Gossypium hirsutum. L.). The experiment was conducted in split plot design with 3 planting densities (Dl, 74,100 D, 49, 400 and D, 37,050 plantslha) as main plots and 4 N (0, 50, 75, , 100 kg Nlha) levels as subplots. At high plant population (Dl), significant response could be obtained up to 75 kg Nlha and interaction of 13X N was , signikant. The economic optimum dose at Dl, D, and D, was 84, 88 and 62 kg Nlha respectively. The apparent recovery of applied N was highest with D, (31.3 47.6%), intermediate with D, (29.5 31.8%) and least with D, (1 7.8 26.8%). The petiole nitrate nitrogen was low at higher planting densities.

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