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 |
A field experiment was carried out during kharif season of 2016 at the research farm of Regional Rainfed Lowland Rice Research Station, ICAR-National Rice Research Institute, Assam to assess the response of nitrogen levels through neem coated urea in rice cultivars under shallow lowland ecosystem of Assam .The experiment was laid out in split plot design with four high yielding rice cultivars (‘Naveen’, ‘TTB 404’, ‘CR Dhan 100’, and ‘CR Dhan 310’) in main plots and five levels of nitrogen (0, 30, 45, 60 and 75 kg/ha N) through neem coated ureain subplots, replicated thrice. Cultivars of rice responded differently to nitrogen levels. ‘Naveen’ was found most productive and profitable followed by ‘TTB 404’ and ‘CR Dhan 100’. The lowest optimum economic doses of N were 71.1, 89.7, 133.7 and 186.1 kg/ha N for ‘Naveen’, ‘TTB 404’, ‘CR Dhan 100’, and ‘CR Dhan 310’, respectively. Among the nitrogen levels, 60 kg/ha N was found sufficient to achieve comparable productivity and profitability of rice cultivars under shallow lowland conditions.
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