Soil Survey Technical References

These references are maintained on other NRCS Web sites.

• Ecological Site Information System
• Keys to Soil Taxonomy
• National Soil Characterization Data
• Plants National Database
• Soil Order Photos & Extent Maps
• Soil Quality
• Soil Taxonomy

The National Soils Technical References contains links for the following:

• Field Book for Describing and Sampling Soils
• Field Indicators of Hydric Soils
• Lab Methods Manual
• Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin
• National Forestry Handbook
• National Forestry Manual
• National Instructions
• National Range and Pasture Handbook
• National Soil Survey Handbook
• Soil Classification
• Soil Survey Manual
• Technical Notes
• Testing Methods for Phosphorus and Organic Matter

Last Modified: 01/24/2012