Soil Horizon
Definition: soil horizon
soil horizon: a layer of soil that is of a different colour or texture from other layers. (NOTE: There are four soil horizons: the A horizon or topsoil containing humus; the B horizon or subsoil containing minerals leached from the topsoil and little organic matter; the C horizon or weathered rock; and the D horizon or bedrock.) Understanding soil horizons helps farmers manage land resources effectively, promoting sustainable agricultural practices.