Abstract

Field experiments were conducted at the Agricultural College and Research Institute, Tamil Nadu Agricultural University Killikulam for two years (1990, 1991) to find out the effect of crop geometry, intercropping and nitrogen management in summer irrigated cotton Results indicated that, seed cotton yield was influenced by geometry, intercropping and nitrogen management Sole crop of cotton planted in uniform row with a spacing of 75 x 30 cm recorded higher seed cotton yield Intercropping of black gram reduced the seed cotton yield to the tune of 12 to 18 per cent. Seed cotton yield was higher at 80 kg N/ha but it was comparable with 60 kg N + Azospirillum. Highest net monetary return of Rs. 17,208/ha and cost benefit ratio of 3.38 was recorded under paired row geometry of cotton with two rows of black gram as intercrop applied with 60 kg N + Azospirillum resulting in a saving of 29 kg N/ha.

Keywords: Summer Cotton, Intercropping, Nitrogen Management, Productity, Profitability