Lisa A. McCauley and David G. Jenkins. 2005. GIS-based estimates of former and current depressional wetlands in an agricultural landscape. Ecological Applications 15:1199–1208.

Appendix B (Fig. B1). A diagram showing hydric soils including soils with hydric inclusions.

FIG. B1. Hydric soils, including soils with hydric inclusions, which are typical of drainage ditches and depressions. The combination of the two classes of soils includes 92.3% of Champaign County, Illinois, USA