b horizon
/ˈbiː həˌraɪzən/
noun
- The layer of soil beneath the topsoil (A-horizon), often rich in minerals and clay, where materials from above accumulate.
- The gardener dug down to the b-horizon to check the soil's mineral content.
- Farmers study the b-horizon to understand how water drains through the ground.
- In this forest, the b-horizon is thick with clay and iron deposits.
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