Across
- 3. cultivation of a single crop
- 7. farm animals
- 8. substance that is toxic to plants
- 10. depleting of natural resource
- 11. can be maintained
- 12. salts in water remain in the soil after evaporation
- 13. remove every tree from area
- 15. supply of water to land or crops to help growth
Down
- 1. substance used to destroy insects
- 2. replanting trees in an area
- 4. gather a crop
- 5. increased efficiency but requires more use of fossil fuels
- 6. leads to damage of grassland
- 9. water turned into vapor
- 14. relies on drilling methods