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Resource-conserving agriculture increases yields in developing countries.

J N Pretty1, A D Noble, D Bossio

  • 1Department of Biological Sciences and Centre for Environment and Society, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK. jpretty@essex.ac.uk

Environmental Science & Technology
|April 1, 2006
PubMed
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Sustainable agricultural practices boost crop yields by 79% and improve environmental services. These methods enhance farm productivity and benefit poor households, offering cautious optimism for future food security.

Area of Science:

  • Agricultural Science
  • Environmental Science
  • Development Studies

Background:

  • Hunger, poverty, and environmental damage persist despite progress.
  • Agricultural sustainability aims for practices with no adverse environmental effects and improved food productivity.

Purpose of the Study:

  • To assess the impact of 286 agricultural interventions in 57 developing countries.
  • To evaluate increases in farm productivity and improvements in environmental services.

Main Methods:

  • Analysis of 286 interventions across 57 countries, covering 37 million hectares.
  • Evaluation of crop yield, water use efficiency, carbon sequestration, and pesticide use.

Main Results:

  • Average crop yield increase of 79% (geometric mean 64%).

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  • Improvements in water use efficiency for all crops, especially rainfed.
  • Potential for significant global carbon sequestration (0.1 Gt C y(-1) if widely adopted).
  • 77% of projects showed reduced pesticide use (by 71%) alongside yield growth (by 42%).

    • Conclusions:

    • Sustainable agricultural interventions show significant potential for increasing productivity and environmental benefits.
    • These practices offer cautious optimism for meeting future food needs, with notable benefits for poor farm households.