Across
- 3. The layers which make up soil
- 6. A microscopic worm found near plant roots
- 10. Plants too small to see with the naked eye
- 13. Makes up 5% of soil
- 14. Loosely compacted deposit of windblown sediment
- 17. Organisms similar to plants which feed on organic matter
- 18. The soil layer with the highest concentration of organic matter
- 21. Primary soil particles held together in a cluster
- 24. The preparation of land for growing crops
- 25. Reduction of nitrogen by microbial activity
- 26. _____ soil has an absence of oxygenated air
Down
- 1. Solid rock that lies under loose material
- 2. A nitrogen-fixing bacterium which is common in soil
- 4. The measure of void space in soil
- 5. _____ soil has plenty of oxygenated air
- 7. Animals too small to see with the naked eye
- 8. Conversion of organic compounds to an inorganic form
- 9. A section of soil near the plant roots which has a high amount of microbial activity
- 11. Biochemical breakdown of organic matter
- 12. Lies immediately under the surface soil
- 15. A glycoprotein that binds soil particles together
- 16. Single-celled organisms
- 19. Animals between 0.2 and 2 mm in diameter (like mites)
- 20. Makes up 45% of soil
- 22. A type of fine-grained soil material
- 23. Makes up 25% of soil
- 26. Makes up 25% of soil