
Subsoil
Technical Digging
Subsoil is significant in geological and construction contexts, implies challenging work.

Heavy machinery is often required to break through the subsoil.
Not Fertile
Unlike topsoil, subsoil is less fertile and lacks organic materials.

Roots may struggle to penetrate the subsoil due to its compact nature.
Soil Layers
Subsoil is part of a sequence, typically found between topsoil and bedrock.

The garden's subsoil layer was distinct from the rich topsoil above it.
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