noun
- the layer of soil beneath the topsoil that contains less organic matter
verb
- to break up or loosen the subsoil without bringing it to the surface
Usage: agricultural
Examples
- The subsoil in this area is mostly clay and sand.
- Plant roots struggled to penetrate the hard subsoil layer.
- The construction crew had to dig through several feet of subsoil.
- Farmers often subsoil their fields to improve drainage.
- The subsoil contained fewer nutrients than the rich topsoil above.
- Heavy machinery was used to subsoil the compacted earth.
- The geologist took samples from both the topsoil and subsoil layers.