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Subject: Agronomy × Author: John Anurag, P. × End date: 2004 × Start date: 2004 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Evaluation of sustainable production model of wheat yield in rice-wheat cropping system
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2004-04) John Anurag, P.; Singh, R.K.
    To evaluate the wheat yield in different crop models due to integrated affect of different nitrogen levels, weed flora and soil physical and chemical properties, an experiment in randomized block design was laid out during kharif season of 2002-2003 at Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar. Four models viz., recommended dose of NPK and Zn (150, 60, 40 and 25 kg ha-1), nitrogen 180 kg ha-1 along with green manure of Sesbania and recommended dose of P, K and Zn, 10 per cent extra of recommended dose of fertilizer and recommended dose of NPK and Zn with direct seeding of rice followed by zero tillage wheat, were taken into consideration for their comparison. Models were considered as treatments and were replicated twenty one times. Wheat variety PBW-243 was sown on 12th of November using 100 kg seed ha-1. Experimental soil was silty clay loam in texture. Model subjected to higher fertilizer doses showed significantly higher yield and yield attributing characters. Green manuring in the previous rice crop was found to have a positive residual effect on succeeding wheat crop. Yield in recommended dose of fertilizer with conventional tillage, was at par with zero tillage model with recommended package of fertilizer doses. Improved soil physical properties were found due to green manuring, whereas results in this regard can be anticipated in zero tillage in long term. Except available nitrogen, available phosphorus and potassium in soil were found to be highest in green manuring model followed by zero tillage. Fertility status of soil reflected nutrient concentration in straw and grain of wheat. Thus, green manuring of Sesbania before rice crop can be regarded as the best model among the four models considered, followed by zero tillage after direct seeded rice in terms of wheat yield.