Assertion: soil's horizon | /r/HasProperty | the subsoil
Facets:
value: commonly
type: DEGREE
Source sentences:
text: Most soils have three major horizons -- the surface horizon (A), the subsoil (B), and the substratum (C).
text: The A horizon is the second layer of the soil profile, extending about 10-inches deep, and is commonly known as topsoil.