Summary
This paper, published in Agriculture, Ecosystems & Environment, investigates the contribution of cover crops to soil carbon and nitrogen cycling in arable rotations. Drawing on field-based measurements, Poffenbarger et al. (2017) likely assess how cover crop species choice — including legumes, grasses, and brassicas — affects the accumulation or retention of soil C and N. The findings are broadly relevant to efforts to improve soil health and reduce nitrogen losses in row-crop agriculture.
UK applicability
Although the research was likely conducted in the US Midwest context, the principles governing cover crop effects on soil C and N cycling are transferable to UK arable systems, where cover cropping is increasingly promoted under agri-environment schemes and post-Brexit agricultural policy. Species selection and rotation design may differ under UK conditions.
Key measures
Soil organic carbon (g/kg or Mg/ha); total soil nitrogen (g/kg); potentially C:N ratio; soil carbon fractions; cover crop biomass nitrogen content
Outcomes reported
The study examined how cover crop species and mixtures influence soil organic carbon and nitrogen stocks or fractions. It likely reported changes in soil C and N pools under cover-cropped versus bare fallow or cash-crop-only rotations.
Topic tags
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