Summary
This study applies X-ray computed tomography alongside conventional soil physical measurements to characterise soil pore architecture and hydraulic functioning in a native forest and adjacent sugarcane production systems in northeast Brazil, including a treatment with Brachiaria ruziziensis cover crop intercropping. By comparing three land-use types across multiple soil depths, the research provides insight into how conversion from native forest to sugarcane modifies soil structural properties and water dynamics, and whether cover crop intercropping can partially mitigate these effects. The work contributes to a growing body of CT-based soil science research in tropical agricultural contexts where such characterisation remains limited.
UK applicability
This study is conducted in a tropical northeast Brazilian context under sugarcane production, which has limited direct applicability to UK farming systems or policy. However, the methodological approach using X-ray CT to assess soil pore architecture and hydraulic functioning is transferable, and findings on cover crop intercropping effects on soil structure may offer broader conceptual relevance to UK discussions on arable soil health and cover cropping.
Key measures
Soil porosity; pore size distribution; macroporosity; tortuosity; saturated hydraulic conductivity; water retention; bulk density; X-ray CT-derived pore architecture metrics across soil layers (0–10, 10–20, 20–40 cm)
Outcomes reported
The study quantified soil structure, pore architecture, and hydraulic functioning across native forest, sole sugarcane, and sugarcane intercropped with Brachiaria ruziziensis, using X-ray computed tomography and conventional soil physical measurements. Key outcomes likely include differences in pore size distribution, macroporosity, tortuosity, and water retention and conductivity across land-use types and soil depths.
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