Across
- 3. Animal that improves soil structure through burrowing
- 6. Fine soil particles that can retain water and nutrients
- 9. Microbial conversion of ammonium into nitrate
- 10. Process that releases CO2 from soil organisms
- 11. Bacteria that fix nitrogen in legume root nodules
- 15. Microbial conversion of nitrate into nitrogen gases
- 16. Movement of nutrients down through the soil
- 17. Nutrient important for plant energy transfer
- 18. Stable organic material formed during decomposition
- 20. Uptake of inorganic nutrients by microorganisms
- 22. Breakdown of dead organic material in soil
- 25. Fungi that form symbioses with plant roots
- 26. Upper soil layer rich in organic matter
- 27. Microscopic worms commonly found in soil
- 29. Saturation of soil with excess water
Down
- 1. Conversion of organic nutrients into inorganic forms
- 2. Organisms that decompose dead organic matter
- 4. Proportion of sand, silt and clay in soil
- 5. Element forming the basis of soil organic matter
- 7. Conditions where oxygen is absent or very limited
- 8. Organisms that feed on dead organic material
- 12. matter Dead and decomposed material found in soil
- 13. Soil zone directly influenced by plant roots
- 14. Nutrient often limiting plant growth
- 17. Measure of how acidic or alkaline a soil is
- 19. Greenhouse gas produced in oxygen-poor soils
- 21. Microscopic organisms driving many soil processes
- 23. ecosystem Community of organisms interacting within the soil
- 24. fixation Conversion of atmospheric nitrogen into usable forms
- 28. Microorganisms involved in many soil processes