Across
- 3. a rock formation that is the source of soil
- 4. dark, organic material found in soil
- 6. method to maintain the fertility of the soil
- 8. a loose mixture of rock fragments, organic material, water, and air that supports growth if vegetation
- 10. without soil to hold water, plants get the moisture of the nutrients they need
Down
- 1. soil structure
- 2. top layer of soil is called
- 5. soil often ends up in a series of layers
- 7. process by which wind, water, and ice or gravity transports soil
- 9. the layer of rock beneath the soil