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Hydric Soils Technical Note 3
Protocol for Requesting NTCHS Changes to
"Field Indicators of Hydric Soils in the United States".
Send comments to Wade Hurt.
The NTCHS is responsible for maintaining the Hydric Soil Definition,
the Hydric Soil Criteria (and the resulting Hydric Soil List), Field
Indicators of Hydric Soils, and other aspects of hydric soils. The
publication "Field Indicators of Hydric Soils in the United States"
(USDA, NRCS, 1996, as revised; see Hydric Soil Technical Note 2) is the
current guide that should be applied to identify and delineate hydric
soils in the field. Changes are anticipated as new knowledge of
morphological, physical, chemical, and mineralogical soil properties
accumulates. Revisions, additions, and other comments regarding field
observations of hydric soil conditions that cannot be documented using
the presently recognized Hydric Soil Indicators are welcome; however,
any modifications and additions must be approved by
the NTCHS.
Guidelines for requesting changes to field indicators are as follows:
- Adding indicators or changing existing indicators: Minimally, the
following should accompany all requests for additions and changes to
existing hydric soil indicators in "Field Indicators of Hydric Soils
in the United States":
- Detailed pedon descriptions of at least three pedons that
document the addition or change and detailed pedon descriptions of the
neighboring non hydric pedons.
- Detailed vegetative data collected to represent the vegetation
of the six pedons.
- Saturation (inundation) data and Eh data for a duration that
captures the saturation cycle (dry-wet-dry) of, at least, one of the hydric pedons and one of the non hydric pedons. Precipitation and
in-situ soil-water pH data from the same sites should also be
provided.
- Adding a Test Indicator: Minimally, the following should accompany
all requests for adding a test indicator to "Field Indicators of
Hydric Soils in the United States":
- Detailed pedon descriptions of at least three pedons that
document the test indicator and detailed pedon descriptions of the
neighboring non hydric pedons.
- Detailed vegetative data collected to represent the vegetation
of the six pedons.
- All requests should identify the problem and explain the rationale
for the request. Requests and data should be sent to:
Wade Hurt, Chair
NTCHS Field Indicator Subcommittee
P.O. Box 110290
University of Florida
Gainesville, FL 32611-0290
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