Fig. 4: Relationships between albedo/∆α and soil organic carbon on snow-free days during the dormant season (Nov. to Mar.) in Indiana.

a–c Compare soil organic carbon to the albedo of no-till fields, the albedo of conventional till fields, and the albedo differences between them (∆α). These county-scale estimates are aggregated from transect field-level data. The shaded area is 95% Confidence Interval of the fitted model. We did not extend the model beyond 20% SOC due to poor data representation in this range.