Fig. 1. Reduction in (A) sediment mass, (B) organic N, and (C) NO₃–N by distance from source area (0.7, 4, and 8 m) in (A) fescue filter strips under interrill flow (FS) and fescue filter strips under concentrated flow (CF-FS). Error bars represent the standard deviation of the mean (s/). Because there were no significant differences in sediment and nutrient reduction between interrill and concentrated flow within grass barriers, graphs were not depicted for the corresponding treatments.