Assertion: swamp's soil | /r/HasProperty | oxygen deficient
Facets:
value: due to water saturation
type: CAUSE
value: occasionally
type: DEGREE
Source sentences:
text: The U.S. Fish and Wildlife Service (FWS) developed a non-regulatory, technical definition of wetlands that emphasize these concepts via the following three points: (1) hydrology--the degree of flooding or soil saturation is such that at some time during the growing season, the substrate is saturated or covered by shallow water; (2) vegetation--plants adapted to grow in water or in a soil or substrate that is occasionally oxygen deficient due to water saturation (hydrophytes) are found; and (3) soils--those saturated long enough during the growing season to produce oxygen-deficient conditions in the upper part of the soil, which commonly includes the majority of the root zone of plants, predominate (i.e., hydric soils) (Cowardin and others, 1979; Tiner, 1991).