Integrated Nitrogen Management in Bt Cotton (Gossypium hirsutum L.) Patel M.G., Patel D.M.*, Patel K. M. Department of Agronomy, C. P. College of Agriculture, S.D. Agricultural University, Sardarkrushinagar-385 506, Dist: Banaskantha, Gujarat, India *email: dinesh.ruppur@yahoo.com
Online published on 2 January, 2017. Abstract A field experiment was conducted to study the integrated nitrogen management in Bt. Cotton (Gossypium hirsutum L.) on sandy loam soil at Agronomy Instructional Farm, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar during kharif season of 2013–14. Application of 100% recommended dose of N through inorganic fertilizer + 25% RDN through castor cake along with seed inoculation with Azotobacter and PSB recorded taller plants at 30, 60, 90 and 120 DAS, higher number of monopodial branches per plant at 60 and 90 DAS and sympodial branches per plant at 60, 90 and 120 DAS, number of balls per plant at 120, 150, 180 and at last picking, weight of seeds per boll, seed index, weight of seed cotton per boll, seed cotton yield, stalk yield and oil yield. However, different integrated nitrogen management practices did not reach to the level of significance with respect to number of seeds per boll, oil content of cotton seed, ginning percentage and mean fibre length. It also gave maximum net returns and BCR. Top Keywords Azotobacter, PSB, Castor cake, Inorganic fertilizer, Bt. cotton. Top |