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McGrath Till Plain and Drumlins

Ecoregion in MN, WI

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This ecoregion is a transition from hardwood forest and hay farming in the north to corn and soybeans farming in the south. The topography is undulating and gently rolling with sections of elongated hills or drumlins; elevations vary from around 300 m in the river valleys in the east and south to 400 m or more in the northwest, but varies in the northern section from lower elevation outwash areas to higher elevation glacial drift. The presettlement vegetation was prairie in the southwest, aspen-oak woodlands and oak openings and savanna in the southeast, and hardwoods and aspen-oak woodlands in the north (north of the Sauk River). The soils in the north are primarily forest Udalfs, and a mix of Udalfs and moist prairie Udolls in the south. There are few lakes in this ecoregion. This ecoregion is entirely in the “Dairy Belt” of Hart and Ziegler (2008) where, especially in the northern section, the rolling topography is more likely to be planted with hay crops which then provide feed for dairy cattle. About 30% of this ecoregion was corn and soybeans, 20% deciduous forest, and 20% wetlands in 2013.

— EPA

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Ecoregion