A horizon 1
noundomain: location
Princeton WordNet [ver.3.1]
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EnglishDefinition
the top layer of a soil profile; usually contains humus
Instance_Hypernym
soil horizon 1
noun
a layer in a soil profile
Substance_meronym
humus 1
noun
partially decomposed organic matter; the organic component of soil
EnglishSubstance_holonym
humus 1
noun
partially decomposed organic matter; the organic component of soil
