Redoximorphic features (RMFs)

Note the accumulation of iron (redox feature) and areas of reduction (gray color) from the lower subsoil of an Augusta soil.

 

For a detailed description of the soil, visit:

soilseries.sc.egov.usda.gov/OSD_Docs/A/AUGUSTA.html

 

Redoximorphic features (RMFs) consist of color patterns in a soil that are caused by loss (depletion) or gain (concentration) of pigment compared to the matrix color, formed by oxidation/reduction of iron and/or manganese coupled with their removal, translocation, or accrual.

 

For more information about describing and sampling soils, visit:

www.nrcs.usda.gov/resources/guides-and-instructions/field...

or Chapter 3 of the Soil Survey manual:

www.nrcs.usda.gov/sites/default/files/2022-09/The-Soil-Su...

 

For additional information on "How to Use the Field Book for Describing and Sampling Soils" (video reference), visit:

www.youtube.com/watch?v=e_hQaXV7MpM

 

For additional information about soil classification using USDA-NRCS Soil Taxonomy, visit:

www.nrcs.usda.gov/resources/guides-and-instructions/keys-...

or;

www.nrcs.usda.gov/resources/guides-and-instructions/soil-...

 

For more information about Hydric Soils and their Field Indicators, visit:

www.nrcs.usda.gov/resources/guides-and-instructions/field...

 

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