Across
- 5. layer that is made of mostly clay and other minerals
- 6. plowing the edges of slopes to prevent soil loss
- 10. hard rock underneath the soil
- 11. wares away physically
- 16. organism that breaks down soil
- 17. thick mass of grass roots and soil
- 18. line that shows levels of elevation
- 23. layer of dead plants, leaves, and soil
- 26. layer that is what plants get planted in
- 27. method of farming to keep switching crops to keep soil fertile
- 28. geological principle that uses the same geological process as before
- 29. characteristic of a mineral that has tiny holes in it
Down
- 1. cause of potholes
- 2. organic material
- 3. loose material that plants grow in
- 4. Great Plains area in the 1930s when wind caused soil loss
- 6. line that shows increasion from one line to another
- 7. breaks down ricks at Earths surface
- 8. management to prevent soil destruction
- 9. anything natural that humans use
- 12. method to leave crops in to hold soil in place
- 13. chemically breaks down rocks
- 14. heavy line that shows round units
- 15. measure of how the soil supports the plant
- 19. ice, water, wind, or gravity moves weathered rock or soil
- 20. map that shows surface features
- 21. chemical change when oxygen and other substances combine
- 22. grinding away by ice and water
- 24. soil that is equally made up by clay, silt, and sand
- 25. layer of soil that differs in color and texture from the layers around it