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Across
  1. 4. soil cover
  2. 5. animal waste fertilizer
  3. 8. fertile layer
  4. 9. nutrient-rich soil
  5. 11. potassium fertilizer
  6. 14. soil nutrient
  7. 16. acidic soil
  8. 17. soil conditioner
  9. 19. nitrogen-rich fertilizer
  10. 20. balanced soil type
  11. 21. worm compost
  12. 23. retains moisture
  13. 25. dense soil type
Down
  1. 1. decomposed matter
  2. 2. organic matter
  3. 3. soil oxygenation
  4. 6. leaf fertilizer
  5. 7. essential plant nutrient
  6. 10. manure cover crop
  7. 12. smooth soil type
  8. 13. boosts leaf growth
  9. 15. soil pH adjuster
  10. 18. beneath topsoil
  11. 22. gritty soil type
  12. 24. alkaline soil