Across
- 3. Tiny air spaces
- 4. Thick mass of roots and soil
- 7. Plowing along curves of a slope
- 8. Mixture of clay and humus
- 12. Chemical and physical processes breaking down rock
- 13. A measurement on soil supporting plant growth
- 15. Connecting points of equal elevation
- 16. A geological principle
- 17. Rock grinding away
- 18. A solid layer beneath soil
- 19. Chemical changes breaking down rocks
- 21. Used by humans
- 22. Dead stalks used to hold soil in place
- 26. Loose weathered material
- 27. 1930's
- 29. Rich and fertile
Down
- 1. A soil layer with different textures and colors
- 2. Breaking down organism remains
- 5. Managment to protect soil destruction
- 6. Elevation differences
- 9. Showing surface features
- 10. Beneath topsoil
- 11. Weathered rock broken into small pieces
- 14. Dark colored and organic
- 20. Frozen water splitting cracks
- 22. Planting different crops each year
- 23. Moving weathered rock and soil
- 24. Heavier contour lines
- 25. A chemical change involving oxygen
- 28. Parts of dead plants on the surface