what is subsoil
Define subsoil. subsoil synonyms, subsoil pronunciation, subsoil translation, English dictionary definition of subsoil. n. The layer or bed of earth beneath the topsoil. tr.v. subÂ·soiled , subÂ·soilÂ·ing , subÂ·soils To plow or turn up the subsoil of. subâ²soilâ²er n. n a.