Summary
This 2024 field study, published in Resources Conservation and Recycling, investigates how extended cereal-legume intercropping affects soil organic carbon distribution in dryland agricultural systems. The research suggests that whilst intercropping is often promoted for sustainability benefits, long-term practice may accelerate SOC losses in deeper soil layers, warranting reassessment of carbon sequestration assumptions. The findings contribute to understanding of how intercropping systems affect belowground carbon dynamics across the soil profile.
UK applicability
UK dryland and semi-arid regions are limited, but the findings are relevant to rainfed cereal-legume systems in lowland and upland areas. If intercropping becomes more prevalent in UK arable rotations for nitrogen cycling or agronomic benefits, subsoil carbon monitoring should be incorporated into soil health assessments.
Key measures
Soil organic carbon concentration and stock in topsoil and subsoil layers; long-term temporal changes in dryland intercropping systems
Outcomes reported
The study examined changes in soil organic carbon (SOC) stocks across soil profiles in long-term cereal-legume intercropping systems under dryland conditions. As suggested by the title, the research reports on the trajectory of subsoil organic carbon in response to sustained intercropping practices.
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