Summary
This narrative review synthesises evidence for Conservation Agriculture as a sustainable intensification approach, reporting that CA had spread to approximately 106 million hectares globally by 2009 at an annual expansion rate of 5.3 million hectares since 1990. The authors argue that CA's counterintuitive ecological mechanisms—promoting soil health, productive capacity and ecosystem services—require deeper understanding for effective implementation. The paper positions CA as a knowledge-intensive system capable of optimising resource use and protecting ecosystem processes over the long term.
Regional applicability
The study is global in scope and identifies CA adoption across diverse geographies. While the paper does not focus specifically on United Kingdom conditions, CA principles are applicable to UK arable and mixed farming systems, though uptake in the UK remains limited compared to global adoption rates. Transferability to UK contexts depends on localisation of knowledge systems and farmer engagement with reduced-tillage approaches.
Key measures
Global area under Conservation Agriculture (hectares), annual rate of increase since 1990, agricultural benefits, environmental benefits, ecosystem services
Outcomes reported
The study estimated global adoption of Conservation Agriculture at 106 million hectares of arable and permanent crops grown without tillage as of 2009, with an annual increase of 5.3 million hectares since 1990. It assessed both agricultural and environmental benefits of CA adoption and discussed its role in sustainable production intensification.
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