Fig. 1. Resident concentration of the four anionic tracers (Br^–, pentafluorobenzoate [PFBA], 2,6-diflurobenzoate [DFBA], and trifluoromethylbenzoate [TFBA]) at the end of experiment in surface layers (a) LA1, (b) LA2, and (c) LA3. Depth is relative to the infiltration surface, which was located 3 cm below the actual soil surface.