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Minnesota/Wisconsin Upland Till Plain

Ecoregion in MN, WI

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The Minnesota/Wisconsin Upland Till Plain (50b) is an undulating stagnation and ground moraine plain, with broad areas of hummocky, acid, loamy and sandy till and outwash. The Minnesota/Wisconsin Upland Till Plain ecoregion has fewer lakes than ecoregions to the east, but a greater lake density than ecoregion 50a to the north. Extensive wetlands–in areas of poorly drained soils, peat over acid sedge and woody peat soils–are scattered throughout the ecoregion and are common in hummocky areas. The till plain of 50b supports a PNV mosaic of red and white pine, conifer swamps, and aspen/white birch/pine forests. Woodland and forest cover the majority of the ecoregion, although there is some limited agriculture with main crops of feed-grains and potatoes. This region also has one of the lowest densities of roads in the state. 50c. St. Croix Pine Barrens The St. Croix Pine Barrens (50c) ecoregion is characterized by jack pine, concentrations of red and white pine forests and barrens, and well-drained, pink sandy soils. Ecoregion 50c has a greater concentration of lakes, a higher percentage of clear lakes, and lakes with a lower trophic state than in surrounding ecoregions. The sandy soils and pine barren vegetation distinguishes ecoregion 50c from the silty lake plain and boreal forests of 50a and the till plain and more deciduous forest mosaic of 50b.

— EPA

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