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Data and Reports

Soil Survey Geographic Database (SSURGO)

The Soil Survey Geographic Database (SSURGO) contains information about soil as collected by the National Cooperative Soil Survey over the course of a century. The information was gathered by walking over the land and observing the soil. Many soil samples were analyzed in laboratories.

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Guides and Instructions

Soil Survey Manual

The Soil Survey Manual (USDA, Agriculture Handbook No. 18) provides the major principles and practices needed for making and using soil surveys and for assembling and using related data. 

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Guides and Instructions

Soil Taxonomy

The second edition of Soil Taxonomy, A Basic System of Soil Classification for Making and Interpreting Soil Surveys is the result of the collective experience and contributions of thousands of pedologists from around the world.

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Education and Teaching Materials

Soil Texture Calculator

Learn how to calculate a single point texture class based on percent sand, silt, and clay. Including the optional sand fractions will refine the calculation.

Data and Reports

Soils

The Iowa NRCS Soils Program provides quality soil, geographic, and resources information, products, and services to internal and external customers.

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Education and Teaching Materials

Soils Planners

Download or order the 2024 Soils Planner.

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Data and Reports

Soils Tools

Select a category to see soils-related tools.

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Tech Tools

SPAW - Version 6.02

Soil, Plant, Atmosphere, and Water is a water budgeting tool for farm fields, ponds and inundated wetlands.

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