Across
- 3. Soil clusters reduce soil _______
- 6. PCBs
- 7. leaked by oil fields, tankers, pipelines, refining plants
- 9. the excess growth of aquatic life
- 10. salinization inhibits this in plants
- 11. soil matter contains 5% of this
- 12. the structure of silica
- 13. this much of the world's irrigated land has been damaged by salt
- 14. plants and animals are examples of this type of matter
Down
- 1. a main component of the earth's crust
- 2. ___________ is the accumulation of water soluble ions or salts in the soil
- 4. this and fungi decompose organic matter
- 5. the process where nitrogen and phosphorus are released from organic matter
- 6. controls insect pests
- 8. arsenic, chromium, copper, lead ,zinc and _____ are examples of organic contaminants