Soil Moisture Definitions:
Hydric - Wet, plants periodically or often inundated by water. Water removed so slowly that water table is at or above soil surface all year; gleyed mineral or organic soils.
Sub-hydric - Water removed slowly enough to keep water table at or near surface for most of year; gleyed mineral or organic soils; permanent seepage < 30 cm below surface
Hygric - Water removed slowly enough to keep soil wet for most of growing season; permanent seepage and mottling; gleyed (greenish-blue-grey) colors common
Sub-hygric - Water removed slowly enough to keep soil wet for a significant part of growing season; some temporary seepage and possibly mottling below 20 cm
Mesic - Moist, adequate soil moisture retention year-round. Water removed somewhat slowly in relation to supply; soil may remain moist for a significant, but sometimes short period of the year. Available soil moisture reflects climatic inputs
Sub-mesic - Water removed readily in relation to supply; water available for moderately short periods following precipitation.
Sub-xeric - Moist to dry, seasonally moist, periodically dry. Water removed rapidly in relation to supply; soil is moist for short periods following precipitation
Xeric - Dry and drought resistant, little moisture retention, excessively drained -- May have multiple assignments. Water removed very rapidly in relation to supply; soil is moist for brief periods following precipitation
Very xeric - Water removed extremely rapidly in relation to supply; soil is moist for a negligible time after precipitation