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- W4378649218 abstract "Cropland management practices that restore soil organic carbon (SOC) are increasingly presented as climate solutions that also enhance yields. But how often these benefits align at the farm level—the scale of farmers’ decision making—remains uncertain. We examined concurrent SOC and yield responses to cover cropping, including their direct connection, with a global meta-analysis. Cover cropping simultaneously increased yields and SOC in 59.7% of 434 paired observations. Increases in SOC directly increased crop yields in soils with initial SOC concentrations below 11.6 g kg−1; for example, a change from 5 g kg−1 to 6 g kg−1 increased yields by +2.4%. These yield benefits of SOC did not decline as nitrogen inputs increased or when legume cover crops were used, suggesting fertility inputs cannot substitute for SOC effects. Regardless of direct effects of SOC increases on yields, integrating legume cover crops into systems with simplified rotations or with nitrogen inputs < 157 kg ha−1 season−1 N led to the largest yield increases (up to +24.3%), with legumes also increasing SOC more than non-legumes (up to +1.5 g kg−1). By simultaneously increasing yields and SOC, cover cropping provides an opportunity to benefit both food security and climate, including via direct yield benefits from SOC increases on low carbon soils. A global meta-analysis examines concurrent soil organic carbon (SOC) and yield responses—including their direct connection—to cover cropping and suggests that targeting cover crops on low-carbon soils can lead to direct yield benefits from SOC increases." @default.
- W4378649218 created "2023-05-30" @default.
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- W4378649218 date "2023-05-29" @default.
- W4378649218 modified "2023-10-06" @default.
- W4378649218 title "Quantifying direct yield benefits of soil carbon increases from cover cropping" @default.
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- W4378649218 doi "https://doi.org/10.1038/s41893-023-01131-7" @default.
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