Across
- 2. vertical section through soil showing horizons
- 6. material upon which a soil develops
- 7. layer of rock and mineral fragments
- 8. layer in a soil profile
- 9. true soil
Down
- 1. washing-out of fine soil components
- 3. proportions of sand, silt and clay
- 4. depletion of soluble materials from upper soil
- 5. soil classification system used in the U.S.
- 9. portion of regolith that supports plant growth