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Current Research in Agricultural Sciences

December 2020, Volume 7, 2, pp 84-99

On-Farm Evaluation of Conservation Agriculture Practice on Weed Control and Yield of Wheat in Northern Bangladesh

Mobarak Hossain

,

Mahfuza Begum

,

Richard Bell

Mobarak Hossain 1

Mahfuza Begum 2
Richard Bell 3

  1. Rice Breeding Platform, International Rice Research Institute, Manilla, The Philippines. 1

  2. Department of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh. 2

  3. School of Veterinary and Life Sciences, Murdoch University, WA, Australia. 3

Pages: 84-99

DOI: 10.18488/journal.68.2020.72.84.99

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Article History:

Received: 18 September, 2020
Revised: 14 October, 2020
Accepted: 09 November, 2020
Published: 02 December, 2020

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Abstract:

On account of rural labour shortages, smallholder farms in South Asia are seeking labour saving strategies for planting and weed control. To overcome this challenge, conservation agriculture practices involving mechanized planting and crop residue retention together with the application of herbicides are being developed. But their effectiveness for weed control is still uncertain. The present study was undertaken to determine the effectiveness of residue retention relative to herbicides and hand weeding for weed control and yield of wheat in strip planted soil in northern Bangladesh. The on-farm experiment was conducted during November-March in 2014-2016, with wheat cv. BARI Wheat 26 grown after monsoon rice under two tillage types combined with the six weed control practices [P1: conventional tillage (CT)+three hand weedings (HW) (Control), P2: Glyphosate (Gly)+strip planting (SP)+one HW, P3: Gly+SP+pre-emergence (PE) herbicide, P4: Gly+SP+post-emergence (PO) herbicide, P5: Gly+SP+PE+PO, P6: Gly+SP+weed-free (WF); and two levels of rice residue retention, R0: no-residue and R50: 50% residue (by height). The CT consisted of two primary tillage operations by a two-wheel tractor, anwhiled SP had done by a Versatile Multi-crop Planter in a single-pass process. A pre-plant herbicide (glyphosate), a PE herbicide (pendimethalin) and PO herbicide (carfentrazon-ethyl) was applied at recommended doses. The combination of applied glyphosate, SP, followed by sequential application of PE and PO herbicides and the retention of 50% of rice straw achieved the highest weed control efficacy. Furthermore, this practice produced the 24% higher yield and 40% higher economic returns relative to control without exerting any phyto-toxicity in wheat.
Contribution/ Originality
This study is one of the very few studies in Bangladesh which have investigated the effect of conservation agriculture principles on weed and crops. Results highlighted the impact of herbicides together with crop residue mulching on weed control and yield of wheat in strip planted soil.

Keywords:

Conservation agriculture, Crop residues, Herbicides, Strip planting, Weed control, Yield.

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Funding:

This research was funded by the Australian Centre for International Agricultural Research (Project LWR/2010/080).

Competing Interests:

The authors declare that they have no competing interests.

Acknowledgement:

The present study was a part of the principal authors Ph. D. research, who acknowledges the Australian Centre for International Agricultural Research and Murdoch University, Australia, for funding and technical support.

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