Summary
This global meta-analysis of 260 and 1,970 paired studies synthesises the agronomic and soil carbon outcomes of no-till conservation agriculture relative to conventional tillage, stratified by regional climate. The findings reveal that conservation agriculture delivers a win-win outcome (enhanced carbon sequestration and increased yield) primarily in arid regions, whilst humid regions typically achieve SOC gains without yield improvement, and colder regions show variable responses. The authors conclude that climate assessment must inform adoption decisions alongside site-specific and management factors.
UK applicability
The United Kingdom's temperate maritime climate—cooler and more humid than the global mean—would likely align more closely with the humid and cold region responses documented in this analysis, suggesting that UK farmers may achieve soil carbon gains but should not assume automatic yield increases. UK policy support for conservation agriculture should account for these regional climate-dependent outcomes.
Key measures
Soil organic carbon (SOC) sequestration rates; crop yield changes; regional climate classification; paired study comparisons
Outcomes reported
The study analysed paired comparisons from 260 studies on soil carbon changes and 1,970 studies on crop yield changes under no-till conservation agriculture relative to conventional tillage across different climate regions. It quantified regional variations in soil organic carbon sequestration and yield responses by climate zone (arid, humid, cold regions).
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