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Not AvailableAdoption of drip system in ha land of cotton is higher. In view of this it was proposed to develop/standardize a low cost drip system through rigorous testing procedures for optimum efficacy under farm situation and higher profitability. Therefore a field trial was conducted consecutively for three years from 2004 to 2007 at CICR, Coimbatore for comparisons of microtube and polytube - 150, 300 and 450 micron (u) thickness - against the existing drip/conventional ridges-furrow irrigation. The experiment was laid out in completely randomized block design replicated five times. Results showed that the existing drip system resulted in maximum seed cotton yield (2.71 t/ha) and economics being at par with those obtained under low cost microtube drip systems and poly-tube systems (150, 300 and 450 u thickness) found significantly superior to ridge-furrow irrigation with respect to seed cotton yield. Existing drip system has high annual irrigation cost (Rs.12,594/ha) and it was the least in polytube of 150 u (Rs 7, 273/ha). Moderately higher yield (2.62 t/ha) with all the positive effects (of drip) along with lower cultivation cost (Rs 27,190/ha) were incurred in poly tube drip system with 150 u and ultimately resulted into higher net return (Rs 38,310/ha) and B:C ratio (2.41).Not Availabl