Summary
This global meta-analysis synthesises 260 studies on soil carbon and 1,970 on crop yield to demonstrate that the benefits of no-till conservation agriculture are highly climate-dependent. Arid regions show the most favourable outcomes—simultaneous soil carbon gains and yield improvements—whilst humid regions tend to increase soil organic carbon at the expense of yield, and colder regions show inconsistent results. The findings underscore that successful adoption of conservation agriculture requires careful climate-specific assessment rather than universal implementation.
UK applicability
The UK's temperate, relatively humid climate suggests no-till may increase soil organic carbon but potentially compromise yields, aligning with the study's humid-region findings. Regional trials and farm-specific assessments would be needed to validate these projections and determine optimal conservation agriculture strategies for British farming conditions.
Key measures
Soil organic carbon (SOC) sequestration rate; crop yield change (absolute or relative); climate classification (arid, humid, cold regions)
Outcomes reported
The study analysed 260 paired studies on soil carbon changes and 1,970 paired studies on crop yield changes under no-till conservation agriculture relative to conventional tillage across different climate zones. It found regional climate is a critical determinant of whether no-till delivers both soil carbon gains and maintained or improved yields.
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