Across
- 4. indigenous to a given area in geologic time
- 6. upper layer of earth in which plants grow
- 8. practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
- 10. fire burn technique sometimes used in forest management, farming, or prairie restoration
- 11. deposit of small white ice crystals formed on the ground or other surfaces
- 12. large, destructive fire that spreads quickly
- 13. biological community of interacting organisms
Down
- 1. the process or period of gathering in crops
- 2. individual animal, plant, or single-celled life form
- 3. variety of life in the world or in a particular habitat
- 5. system of interlocking and interdependent food chains
- 7. substance that is toxic to plants
- 9. large area covered chiefly with trees and undergrowth