National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Field experiments were conducted on a Typic Haplustert of Tamil Nadu by adopting the inductive cum targeted yield model developed for Bt cotton under rainfed situation. The basic parameters viz., NR, Cs, Cf and contribution of nutrients from FYM were computed from the field experimental data developed in the previous cropping season. Using these basic parameters, fertilizer prescription equations were developed under the Integrated Plant Nutrition System (IPNS) and nomograms were formulated for the desired yield target of Bt cotton for a range of soil test values. The quantity of nutrients that could be contributed by FYM at 12.5 t ha-1 was evaluated as 25, 20 and 26 kg N, P2O5 and potassium oxide K2O respectively, when applied along with the NPK fertilizers as per soil test and desired yield target. The fertilizer prescription equations developed for Bt cotton proved their validity under six numbers of farmer’s holdings under rainfed situation.
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