Fig. 2. Mean annual soil N concentrations by depth in Cells 1 and 2 of Wetland System 1 (WS1, Schoenoplectus/Scirpus/Juncus) and in Cells 3 and 4 of Wetland System 2 (WS2, Typha/Sparganium). Means for each soil depth followed by the same letter are not significantly different (P < 0.10) within the same year.