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 |
The present investigation was conducted during kharif 2017-18 with a view to study the nitrogen dynamics and soil nutrient status as influenced by tillage and INM practices under soybean - cotton rotation in Vertisol at Akola. The experiment was carried out with main plot comprises two treatments i.e. conservation tillage and conventional tillage and eight sub plot treatments of IPNS consisting of control, 100 per cent RDF and use of chemical fertilizer along with organic source of nutrient in which 50 per cent N applied through organic sources (FYM, wheat straw, glyricidia leaf manuring (GLM), composted cotton straw, vermicompost and phosphocompost) and remaining N was applied through chemical fertilizers. The experiment was framed in randomised block design with three replications. The results of present experiment indicated that, significantly highest seed cotton yield was recorded with the application of phosphocompost in conjunction with chemical fertilizers (13.71 q ha-1). Among tillage practices, the seed cotton (12.95 q ha-1) and cotton stalk (25.62 q ha-1) yield was recorded with the adoption of conservation tillage as compared to conventional tillage. The improvement in organic carbon (6.47 g kg-1) and available N (253.8 kg ha-1) was noted with the conservation tillage in combination with 50 % N through FYM + remaining RD through chemical fertilizer. The overall improvement in available P, K and S was noted with the application 50 % N through FYM + remaining RD through chemical fertilizer. However, the various inorganic N fractions viz; NH4-N (12.58 mg kg-1), NO3-N (16 mg kg-1) and mineral-N (28.58 mg kg-1) were increased significantly with the application of 50 % N through FYM + remaining RD through chemical fertilizer. Among tillage practices, conservation tillage was found promising for higher retention of NH4-N (12.83 mg kg-1), NO3-N (14.66 mg kg-1) and mineral-N (27.49 mg kg-1).
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