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Effect of green manuring crops on fertilizer economy and monetary advantages of green manure – T. aman-mustard cropping pattern

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Research Paper 01/06/2020
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Effect of green manuring crops on fertilizer economy and monetary advantages of green manure – T. aman-mustard cropping pattern

Israt Jahan Irin, Parimal Kanti Biswas
Int. J. Agron. Agri. Res.16( 6), 1-6, June 2020.
Certificate: IJAAR 2020 [Generate Certificate]
Key: Fertilizer economyGreen manuringMonetary advantagesRice equivalent yieldSoil quality

Abstract

Three experiments were conducted at the Agronomy farm of Sher-e-Bangla Agricultural University, Bangladesh, at 2015 to 2016 to increase cropping productivity by inclusion of green manure in existing cropping pattern, monetary advantages and fertilizer economy as well. Total productivity of different cropping pattern was evaluated in terms of rice equivalent yield (REY) and it was calculated from yield of rice combined with yield of mustard (rice equivalent yield). The highest REY (9.60 t ha-1 in 1st year) and (11.49 t ha-1 in 2nd year) was recorded from the cropping pattern; S. rostrata – T.aman – Mustard followed by C. juncea – T.aman – Mustard and S. aculeata – T.aman – Mustard respectively in 2015 and 2016. The lowest REY (6.02 t ha-1 in 1st year) and (6.98 t ha-1 in 2n year) was obtained from the cropping pattern; Fallow-T. Aman – Mustard. Inclusion of mustard during rabi season in S. rostrata (59.47% and 64.61% in 2015 and 2016 respectively) and C. juncea (41.47% and 49.14% in 2015 and 2016 respectively) increased REY that followed by V. unguiculata (45.70% and 54.15% in 2015 and 2016 respectively) and S. aculeata (40.86% and 32.0% for 2015 and 2016 respectively) compared to Fallow-T. Aman-Mustard cropping pattern. It is noted that inclusion of crops likes S. rostrata, C. juncea, S. aculeata and V. unguiculata showed higher REY than other crops as GM in GM-T. Aman-Mustard cropping pattern. The cost of production in situ green manure was lower than addition of similar quantities from external sources. This would also reduce the N requirement by 50% to obtain similar yields.

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