subsoil
/ˈsʌbˌsɔɪl/
noun
- The layer of soil beneath the topsoil, usually containing less organic matter and more minerals.
- Farmers test the subsoil to see if it has enough nutrients for deep-rooted crops.
- The subsoil in this area is rich in clay, which affects how water drains.
- When digging a hole for a fence post, you will eventually hit the hard subsoil.
Antonyms