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Analysing reduced tillage practices within a bio-economic modelling framework.

Toby J Townsend1, Stephen J Ramsden1, Paul Wilson1

  • 1Division of Agricultural and Environmental Sciences, University of Nottingham, Sutton Bonington Campus, College Road, Sutton Bonington, Loughborough LE12 5RD, United Kingdom.

Agricultural Systems
|July 5, 2016
PubMed
Summary

Reduced tillage in agriculture offers financial and environmental benefits, even with yield reductions. Policy intervention, like CAP Greening, may be needed to encourage wider adoption of these sustainable farming practices.

Keywords:
Bio-economic modellingCAP, Common agricultural policyCT, conventional tillageDRT, deep reduced tillageGHG, greenhouse gasGM, gross marginNE, net energyNM, net marginRP, rotational ploughingRT, reduced tillageReduced tillageSB, spring barleySI, sustainable intensificationSRT1, shallow reduced tillage 1SRT2, shallow reduced tillage 2Sustainable intensificationWB, winter barleyWFB, winter field beansWOSR, oilseed rapeWW, winter wheatZT, zero tillage

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Economics

Background:

  • Sustainable intensification requires changes in farm practices, with reduced tillage as a key approach in arable cropping.
  • Previous studies focused on specific impacts of reduced tillage, neglecting a system-based analysis for sustainable intensification.

Purpose of the Study:

  • To quantify trade-offs between yield, cultivation costs, and crop protection costs using a bio-economic model.
  • To evaluate farm-level net margin, gross margin, net energy, and greenhouse gas emissions under reduced tillage systems.

Main Methods:

  • Utilized the bio-economic optimization model 'MEETA' to simulate different tillage intensities.
  • Extended the MEETA model to assess comprehensive farm-level economic and environmental indicators.

Main Results:

  • Zero tillage demonstrated financial benefits over conventional tillage, even with yield penalties of 0-14.2%.
  • Average yield reductions from zero tillage (0-8.5%) are within realistic ranges, showing potential for sustainable intensification.
  • While financial and environmental benefits exist, yield reductions may necessitate increased land use, potentially offsetting some environmental gains.

Conclusions:

  • Reduced tillage is a viable sustainable intensification strategy with clear financial and environmental advantages.
  • Policy intervention, such as extending CAP 'Greening', is likely necessary to promote increased adoption of reduced tillage practices.