Soil Management and Greenhouse Gas Emissions

Soils represent both a major source and a vital sink for greenhouse gases, notably carbon dioxide, methane and nitrous oxide. Biological processes driven by soil microbes release these gases through respiration and denitrification, while physical and chemical interactions can sequester carbon within stable organic matter pools. Agricultural management—including tillage intensity, residue handling, crop rotations and organic amendments—modulates soil structure, moisture and nutrient availability, thereby altering gas fluxes. Conservation practices such as no-tillage, cover cropping and judicious fertiliser use can enhance soil organic carbon stocks and improve soil aggregate stability, restraining emissions and mitigating global warming potential. Conversely, intensive tillage and excessive nitrogen inputs often accelerate organic matter mineralisation and amplify nitrous oxide release. Understanding the interplay between soil physics, chemistry and biology under different management regimes is essential to balance crop productivity with climate goals. Emerging strategies focus on optimising residue retention, diversifying crop sequences and integrating legumes to promote nitrogen use efficiency, while advancing measurement approaches—from chamber methods to remote sensing—to quantify spatial and temporal variability in emissions.

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Soil Management and Greenhouse Gas Emissions publication trend

The graph below shows the total number of articles in soil management and greenhouse gas emissions across all publications each year (not limited to Nature Index journals).

Technical terms

Global warming potential (GWP): A metric comparing the heat-trapping ability of different greenhouse gases over a specified time frame, expressed in carbon dioxide equivalents.

Soil aggregate stability: The capacity of soil particles to bind together into aggregates that resist disintegration by water or mechanical disturbance, affecting aeration, water retention and microbial habitats.

No-tillage: A cultivation practice that avoids soil inversion and minimises disturbance, preserving surface residues and soil structure to enhance organic matter retention.

Soil organic carbon (SOC): The fraction of carbon in soil derived from decomposed plant and microbial residues, critical for soil fertility and a principal sink for atmospheric CO₂.

References

1. Different responses of agroecosystem greenhouse gas emissions to tillage practices in a Chinese wheat–maize cropping system. Carbon Research (2023).
2. Soil aggregate stability governs field greenhouse gas fluxes in agricultural soils. Soil Biology and Biochemistry (2024).
3. To till or not to till in a temperate ecosystem? Implications for climate change mitigation. Environmental Research Letters (2021).