One of the mysteries of the English language finally explained.
The soil lying immediately under the surface soil.
- ‘Wetland creation attempts are often initiated by the removal of upland surface soil materials exposing mineral subsoil strata.’
- ‘Soil and subsoil will be stocked for subsequent respreading.’
- ‘Heavy clay subsoil or sandy soil with low fertility must be improved if roses are to be grown successfully in them.’
- ‘These soils are moderately deep to deep, well-drained loam or silt loam surface soils with loam or silty clay loam subsoils, formed primarily in sandstone residuum.’
- ‘When digging out the bed, discard any heavy, tight subsoil and save the topsoil.’
verb[with object]usually as noun subsoiling
Plow (land) so as to cut into the subsoil.
- ‘Studies in the past showed that subsoiling clay soil in the spring does not improve cotton harvests.’
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