Horizon Measurements
Record upper and lower boundary.
Depends on the use of the description:
Soil Survey: 0 datum is ground surface.
NE Indicators: Histosols/histic top of Oe. Mineral soils 0 is top of mineral horizon.
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Notes:
Recent leaf litter which has not been compacted by snow or water is not counted as the surface (0 depth) datum for measurement. Blow or swipe the recent leaf litter away, record it as leaf litter on the description form.
