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Hydric Soils of Problematic Conditions and Altered Materials-PA Centric (Recorded Webinar)

This webinar is on the USDA NRCS’ new compendium of Hydric Soils of Problematic Conditions and Altered Materials. This manual, released earlier in 2025, references our current understanding of problem conditions and altered soil scenarios which can cause difficulty in hydric soil identification and it also provides solutions to address these circumstances. Aaron Miller, an NRCS soil scientist, member of the National Technical Committee for Hydric Soils, and author of this publication, presented on this manual and explain its purpose and use, and discusses specific components of this manual most applicable to Pennsylvania.

Resources
- FilePresentation Slides-Hydric Soils of Problematic Conditions
- URLHydric Soils of Problematic Conditions and Altered Materials V. 1.0
- URLMLRA Map
  This is an NRCS Interactive Map of the MLRAs.
- FileIdentifying Hydric Soils Using Alpha, Alpha-Dipyridyl Dye
  From U.S. Army Corps of Engineers
- FileIdentifying Hydric Soils Using Alpha, Alpha-Dipyridyl Dye
  From U.S. Army Corps of Engineers
- FileImproving Hydric Soil Identification in Areas Containing Problematic Red Parent Materials: a Nationwide Collaborative Mapping Approach
  Research Paper on Red Parent Material Soils. It links problematic red parent material soils with soil series.
- URLEcological Site Descriptions
  This can be used to determine more precisely the MLRA for a series. This is explained in the webinar.
- URLSearch Results for Dipyridyl Paper
  To Find Dipyridyl Paper, search for
  Qualitative Dipyridyl paper for Iron: 2 mg/L Fe²⁺