Fig. 1: Site distribution and overall cover crop effects.
From: Optimizing cover cropping application for sustainable crop production
a World map showing the locations of the 271 primary studies included in this study. b Overall effects of legume and non-legume cover crops (CCs) on SOC, yield, and N2O emissions compared to no cover crop. Numbers in parentheses are observations in each grouping, followed by the number of corresponding unique sites. Center dots indicate mean effect sizes, and error bars indicate 95% confidence intervals. The figure is drawn using ArcGIS and R project.
