Soil Survey & Digital Soil Maps

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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 Vinyards.

PDF files are available as one file containing all counties in the state or as one file for each individual county.

Soil Resources and Interpretations Maps and Tables:
Major Land Resource Areas	Soil Associations of Iowa
Slope Class Table	Iowa Carbon Index
Soil Regions of Iowa

DATA SOURCE:

ISPAID 7.2

Many of the above linked documents are in Adobe Acrobat PDF format. To download the free Acrobat Reader, go to ISU's PDF Help Section.