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Indicator A4 (Hydrogen Sulfide) is most likely to occur in salt marshes and other very wet ecosystems.

Field Indicators of Hydric Soils

A Guide for Identifying and Delineating Hydric Soils, Version 8.2

Cover of the Field Indicators of Hydric Soils

Field Indicators of Hydric Soils in the United States was developed by NRCS soil scientists in cooperation with the U.S. Fish and Wildlife Service; the U.S. Army Corps of Engineers; the Environmental Protection Agency; various regional, state, and local agencies; universities; and the private sector. Included in this publication are the hydric soil indicators approved by the NRCS and the National Technical Committee for Hydric Soils (NTCHS) for use in identifying, delineating, and verifying hydric soils in the field. 
 

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Field Indicators of Hydric Soils (14.35 MB)
Errata and revisions for Field Indicators of Hydric Soils (2.92 MB)


Ordering Information

A printed copy is available from:

NRCS Distribution Center
Enter keywords: hydric soils
Phone: 888-526-3227
E-mail: NRCSDistributionCenter@ia.usda.gov

Recommended Citation

United States Department of Agriculture, Natural Resources Conservation Service. 2018. Field Indicators of Hydric Soils in the United States, Version 8.2. L.M. Vasilas, G.W. Hurt, and J.F. Berkowitz (eds.). USDA, NRCS, in cooperation with the National Technical Committee for Hydric Soils.

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Contact Soils

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