Fig. 4. Amino sugar C in macroaggregate-derived size classes on a whole soil basis for (A) conventional tillage (CT) and (B) no-tillage (NT) soils at Horseshoe Bend, GA (0–5 cm depth). Bars with different letters are significantly different (P < 0.05) across aggregate size classes for a given amino sugar. An * indicates a significant difference between CT and NT within an aggregate size class and amino sugar.