Soil Survey & Digital Soil Data: Soil Suitabilities & Interpretations

Key to Soils Within Major Soil Associations of Iowa

Corn Suitability Ratings

Weather Adjustment Factors for the Original Corn Suitability Ratings
by Soil Association Area

Soil Interpretations

Currently there are two different interpretations:

  1. Soil Map Units (SMU’s) requiring Tile Drainage to Achieve Optimal Agronomic Yields for Row Crops and \
  2. SMU’s suitable for Vineyards.

PDF files are available as one file containing all counties in the state or as one file for each individual county. Tables are updated through January 2010.

Soil Resources and Interpretations Maps and Tables:

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