Across
- 4. name for different layers of soil such as topsoil being A
- 5. term for the top lyer of earths crust
- 6. any soil that is more than 60 percent clay
- 8. the supercontinent the world used to be united in
Down
- 1. a factor in healthy soil made from rich organic matter
- 2. the term for the study of soil
- 3. a practice to help prevent soil from becoming depleted
- 7. the healiest type of soil