A field experiment entitled “Effect of nutrient and irrigation levels on nutrient uptake, water and nutrient use efficiency, and kapas yield of cotton in Southern Dry Zone of Karnataka” was conducted during kharif 2016 at Zonal Agricultural Research Station, V. C. Farm, Mandya. The experiment was laid out in split plot design with 3 irrigation levels (0.6, 0.8 and 1.0 IW/CPE ratios) as main plots and 3 nutrient levels (75, 100 and 125% RDF-150:75:75 kg NPK/ha) as sub plots, and these treatments were replicated thrice. Irrigation at 0.8 IW/CPE ratio and nutrient level of 100 per cent RDF have significantly recorded higher growth and yield parameters viz., plant height, sympodial branches, LAI, dry matter production, number of bolls plant-1, individual boll weight, harvest index, water and nutrient use efficiency, and lint yield along with the kapas yield (22.94 and 22.49 q ha-1, respectively) as compared to irrigation at 0.6 IW/CPE ratio and nutrient level of 75 per cent RDF, respectively. But, they were at par with irrigation at 1.0 IW/CPE ratio and nutrient level of 125 per cent RDF, respectively and found optimum in enhancing the cotton growth and kapas yield.

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