Summary
This global meta-analysis compared sustainability outcomes between organic and conventional farming systems, examining not only mean effects but critically also the variability of key metrics. Organic farms demonstrated reliable environmental benefits (higher biotic abundance, richness, and soil carbon with lower variability) and greater profitability despite lower yields, whereas conventional farms achieved higher yields with lower yield variability. The findings suggest that organic certification successfully ensures environmental reliability but that reliance on ecological processes introduces greater predictability challenges in crop production.
UK applicability
These global findings are likely applicable to UK organic farming, where certification standards similarly aim to promote environmental outcomes. However, UK-specific research on yield stability and profitability would be needed to validate whether organic premiums and cost structures align with those observed in this global dataset.
Key measures
Biotic abundance, biotic richness, soil organic carbon, soil carbon stocks, crop yield, total production costs, profitability, and yield variability
Outcomes reported
The study measured and compared seven sustainability metrics between organic and conventional farming systems: biotic abundance, biotic richness, soil organic carbon, soil carbon stocks, crop yield, total production costs, and profitability. Results characterised both the average magnitude and variability of these metrics across farming systems.
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