The fertile soils of the Interior Plains are often referred to as Chernozem.

Chernozem is a rich, black soil that is highly fertile and found primarily in the Interior Plains. This soil type is characterized by its dark color, which is due to its high organic matter content, making it ideal for agriculture. Chernozem supports the growth of various crops, contributing significantly to the agricultural productivity of the region. Its nutrient-rich properties allow for successful farming, especially in areas that rely on the vast plains for crop cultivation, thus playing a crucial role in the economy of the Interior Plains.