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Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
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Beyond conservation agriculture.

Ken E Giller1, Jens A Andersson2, Marc Corbeels3

  • 1Plant Production Systems, Wageningen University Wageningen, Netherlands.

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|November 19, 2015
PubMed
Summary
This summary is machine-generated.

Conservation Agriculture (CA) adoption shows pragmatic success on large farms but limited uptake by smallholders. A context-sensitive Systems Agronomy approach is needed for sustainable intensification.

Keywords:
climate smart agriculturelegumesmulchsoil erosionsustainable intensificationsystems agronomy

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Area of Science:

  • Agronomy
  • Soil Science
  • Sustainable Agriculture

Background:

  • Conservation Agriculture (CA) is promoted for Sustainable Intensification.
  • CA principles include no-till, soil cover, and crop rotation.
  • Widespread adoption on large farms contrasts with disappointing results for smallholders in the tropics.

Purpose of the Study:

  • To analyze the adoption and effectiveness of CA.
  • To challenge claims of universal CA benefits like increased yields and soil carbon.
  • To propose a new approach for sustainable intensification.

Main Methods:

  • Analysis of CA adoption patterns.
  • Evaluation of evidence on CA's impact on crop yields and soil carbon.
  • Application of Systems Agronomy principles.

Main Results:

  • Pragmatic CA adoption observed on larger, mechanized farms.
  • Limited uptake and disappointing results for smallholder farmers in developing countries.
  • Increased stability of crop yields in dry climates is evident, but yield increases and soil carbon build-up are challenged.

Conclusions:

  • CA adoption is context-specific, succeeding on large farms but struggling with smallholders.
  • A shift from prescriptive to rigorous, context-sensitive Systems Agronomy is crucial.
  • Developing tailored soil and crop management options is essential for sustainable agricultural intensification.