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Hydric Soils Technical Notes

Hydric Soils Technical Notes contain National Technical Committee for Hydric Soils (NTCHS) updates, insights, and clarifications of the publication "Field Indicators of Hydric Soils in the United States" (USDA, NRCS, 1996 and 1998). Comments and suggestions for additional notes are encouraged. Each note has the name of the compiler and an email address to send comments. Notes available are:

Technical Note 13: Altered Hydric Soils (PDF; 606 KB)

Technical Note 12: More changes to "Field Indicators of Hydric Soils in the United States" (Version 4.0, March 1998).

Technical Note 11: Technical Standards for Hydric Soils (PDF; 384 KB)

Technical Note 10: More changes to "Field Indicators of Hydric Soils in the United States" (Version 4.0, March 1998).

Technical Note 9: Additional changes to "Field Indicators of Hydric Soils in the United States" (Version 4.0, March 1998).

Technical Note 8: Use of alpha-alpha-Dipyridyl.

Technical Note 7: Changes to "Field Indicators of Hydric Soils in the United States" (Version 4.0, March 1998).

Technical Note 6: Field Indicators for Discharge and Recharge Hydric Soils.

Technical Note 5: Using Hydric Soil Indicators in Disturbed Soils (updated 4/05).

Technical Note 4: Indicator Insights for Hydric Soil Identification.

Technical Note 3: Protocol for Requesting NTCHS Changes to "Field Indicators of Hydric Soils in the United States".

Technical Note 2: Changes to "Field Indicators of Hydric Soils in the United States" (Version 3.2, July 1996).

Technical Note 1: Proper use of Hydric Soil Terminology.