Summary
This paper by Six and colleagues provides a comprehensive historical narrative review of the scientific literature linking soil aggregate dynamics — at both macro- and micro-aggregate scales — to soil biota and the cycling and stabilisation of soil organic matter. It traces the evolution of conceptual and empirical understanding from early aggregate research through to more mechanistic models involving fungi, bacteria, earthworms, and other soil organisms as drivers of aggregate formation and organic matter protection. The review is widely cited as a foundational reference for understanding how biological and physical soil processes interact to regulate carbon sequestration and nutrient cycling.
UK applicability
Although not UK-specific, the mechanistic principles reviewed are broadly applicable to UK arable and mixed farming soils, and the findings are directly relevant to UK policy discussions on soil health, reduced tillage, and carbon sequestration under schemes such as the Sustainable Farming Incentive.
Key measures
Soil aggregate stability; soil organic matter fractions; microbial biomass; fungal and bacterial community activity; macro- and micro-aggregate turnover rates
Outcomes reported
The paper reviews the historical development of research linking soil aggregate structure (macro- and micro-aggregates) to soil biological communities and soil organic matter stabilisation and turnover. It synthesises how understanding of these relationships has evolved over decades of soil science research.
Topic tags
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