Skip to main content
U.S. flag

An official website of the United States government

Science formula hologram over woman's hands taking notes background.

Soil Technical Notes

Specific technical subjects for soil scientists.

Soil Survey Technical Notes (link to Box)

  • Technical Note 12 – Coastal and Subaqueous Soil Interpretations
  • Technical Note 11 – Acid Sulfate Soils in the Coastal and Subaqueous Environment
  • Technical Note 10 – Buried Soils and Their Effect on Taxonomic Classification
  • Technical Note 9 – Populating Taxonomic Moisture Class and Subclass in NASIS
  • Technical Note 8 – Use of Reaction (pH) in Soil Taxonomy
  • Technical Note 7 – Soil Moisture/Soil Temperature (SM/ST) Pilot Project Final Report
  • Technical Note 6 – Saturated Hydraulic Conductivity: Water Movement Concepts and Class History
  • Technical Note 5 – Assessing Carbonates in the Field with a Dilute Hydrochloric Acid (HCl) Solution
  • Technical Note 4 – Populating Map Unit Data: Taxonomic classes and map unit components
  • Technical Note 3 – Clarification of the Definition of Aniso Class
  • Technical Note 2 – Soil Color Contrast
  • Technical Note 1 – Soil Moisture Status in the National Soil Information System

Hydric Soils Technical Notes (link to Box)

  • Technical Note 13 – Altered Hydric Soils
  • 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 (published April 2021)
  • 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