Across
- 3. unnatural or simulated
- 9. fertilizer consisting of potassium nitrate or sodium nitrate
- 10. protein molecule in living organisms
- 11. chemical used to control molds and fungi
- 12. discharging
- 13. chemical used to control weeds
- 15. invertebrate of the phylum Arthropods
- 17. pH value of less than 7
- 18. natural process or in return for cultivation
Down
- 1. speeds up a chemical reaction
- 2. chemical used to control pests
- 4. chemical used to control insects
- 5. mixture of plant compounds used as a chemical indicator
- 6. providing nourishment
- 7. any substance used to fertilize the soil
- 8. something annoying or troublesome
- 14. pH value of more than 7
- 16. oxygen combines with other elements to from new substances