Across
- 2. ____________ crops protect the field from erosion between harvests
- 4. The first layer of soil, dark and nutrient rick
- 6. The B horizon
- 9. Leaving livestock on a field too long which removes plant life
- 11. The seeping of nutrients through soil in the E horizon
- 12. These breakdown to become soil
- 14. The freezing of water in cracks
- 15. The grinding away of rocks by smaller rocks or sand
- 18. The breaking down of rock by physical or chemical processes
- 19. Dead organic matter in the O horizon
- 20. The order of the horizons
Down
- 1. The horizontal layers of soil
- 3. crop __________________ helps to resupply nutrients by planting different crops
- 5. Growing crops on steep mountain sides
- 7. Another name for the R horizon
- 8. The movement of soil by wind or water
- 10. An example of differential weathering
- 13. A chemcial reaction where iron combines with oxygen and creates rust
- 16. Caves are created by this type of weathering
- 17. A tree growing through a rock is this type of weathering