Summary
This meta-analysis, published in Soil Biology and Biochemistry, synthesises findings from the peer-reviewed literature to assess whether cover cropping consistently enhances the soil microbiome. By pooling effect sizes across studies, the authors likely found that cover crops generally increase microbial biomass and activity, though the magnitude of benefit may vary with cover crop species, climate, and soil type. The paper provides a quantitative evidence base for evaluating cover cropping as a management strategy to support soil biological health.
UK applicability
Although the meta-analysis draws on global literature, its findings are broadly applicable to UK arable systems, where cover cropping is increasingly promoted under agri-environment schemes and the Sustainable Farming Incentive as a means of improving soil health between cash crops.
Key measures
Microbial biomass carbon (MBC); microbial biomass nitrogen (MBN); soil enzyme activity; microbial diversity indices; effect size (Hedges' d or response ratio)
Outcomes reported
The study quantified the effects of cover crops on soil microbial biomass, diversity, and activity relative to bare or fallow controls. It synthesised effect sizes across multiple studies to determine whether cover cropping consistently benefits the soil microbiome.
Topic tags
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