Northern Prairie Wildlife Research Center
|46n. James River Lowland||Level IV Ecoregion|
|The Northern Glaciated Plains
ecoregion is characterized by a flat to gently rolling landscape
composed of glacial drift. The subhumid conditions foster a grassland
transitional between the tall and shortgrass prairie. High concentrations
of temporary and seasonal wetlands create favorable conditions for duck
nesting and migration. Though the till soil is very fertile, agricultural
success is subject to annual climatic fluctuations.
The boundary between the James River Lowland and the Drift Plains (46i) to the north represents a broad phenological and climatic transition zone. This ecoregion is characterized by mesic soils, warmer temperatures, and a longer growing season than the Drift Plains (46i). These differences are reflected in the crop types of the region. Winter wheat, corn, and soybeans are more prevalent in this ecoregion's milder climate.
Area (square miles): 9227
Surficial Material and Bedrock
Order (Great Groups)
Precipitation - Mean annual (inches)
Potential Natural Vegetation
Western wheatgrass, green needlegrass, big bluestem, blue grama.
Land Use and Land Cover
Extensively tilled for spring wheat, sunflowers, corn, and soybeans.