Across
- 4. small mineral substance
- 5. small rock fragments
- 8. weathered rock is worn away
- 10. very fine grained mineral material
- 11. organisms that break down dead organic material
- 13. fully decomposed nutrient-rich organic matter in soil
- 16. the subsoil layer (denser and less fertile)
- 19. the topsoil layer (primary root growth spot)
- 20. a substance added to soil to increase fetility and nutrients
- 22. partially weathered and unweathered parent material layer
- 23. soil texture type between sand, silt, and clay
- 24. chemical elements essential for plant growth and life
Down
- 1. soil materials devived from dead plant and animal remains
- 2. fine grained mineral particles
- 3. the geological deposit that soil forms from
- 6. downward moving water in soils transports minerals
- 7. the shape and features of the land surface
- 9. The break-down of rocks
- 12. the surface organic layer (leaf litter and humus)
- 14. the measure of pore space in soil
- 15. a distinct layer of soil
- 17. natural process of soil development
- 18. dead plant matter that has fallen to the ground
- 21. open spaces in soil filled with water or air