Abstract: The cotton variety NIAB-78 showed the highest seed cotton yield of 2.96 t ha–1 when applied with 150 kg nitrogen while the higher weight per 100 seed and large boll size was observed in 180 kg N ha–1. Maximum number of monopidial and sympodial branches were observed in 150 kg N ha–1. Treatments differed significantly from one another in their growth behaviour. Maximum plant height and internodal length were recorded in 180 kg N ha–1. Among quality components of cotton, ginning out turn was significantly affected by different levels of N and found to be maximum at 150 kg N ha–1 while staple length was found to be non-significant. It is inferred that nitrogen application in the range of 150 to 180 kg ha–1 along with 60 kg P2O5, ha–1 is an optimum dose. Nitrogen application beyond 180 kg ha–1 will not be profitable.