Distribution of Mollisols in Iowa
Author: Bradley Miller
This map shows the distribution of Mollisols across Iowa. Mollisols are fertile, dark-colored mineral soils formed under prairie vegetation and are characterized by a thick, organic-rich surface horizon. They are among the most agriculturally productive soils in the world, supporting much of Iowa’s corn and soybean production. The extent of Mollisols reflects both native prairie history and underlying parent material.
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Source:
Catherine DeLong, Burras Pedology Group
Department of Agronomy
Iowa State University
Interpretation:
Mollisols dominate Iowa’s landscape, particularly in the Des Moines Lobe and Loess Hills regions. Their high base saturation and organic matter content contribute to excellent soil structure and fertility. This map provides insight into regional soil productivity and landscape history.
Resolution:
10-meter raster resolution; displayed as a statewide static image
Suggested Use:
Supports soil classification, land valuation, agricultural planning, and ecological restoration efforts. Valuable for understanding native prairie soil distribution and informing soil management practices.
References:
Natural Resource Conservation Service (2013) and Iowa Soil Properties and Interpretations Database (7.3)