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Green River-Southern Wabash Lowlands

Ecoregion in KY, IN

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The Southern Wabash Lowlands ecoregion is undulating to rolling and has many wide, shallow valleys. It lies to the south of Ecoregion 72b and its pre-Wisconsinan till plain; relict dunes and wind-blown silt deposits occur in the west, and shale and sandstone bedrock is exposed in the east. Ecoregion 72c is further characterized by its long growing season and neutral to acid soils. Originally, oak-hickory forests grew on the welldrained upland soils while western mesophytic forests occurred on more poorly-drained soils; some southern plants reached their northern distributional limit in Ecoregion 72c. Today, the woodland has been mostly cleared for corn, soybean, wheat, livestock, and vegetable farming as well as extensive surface coal mines.

— EPA

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Ecoregion