sustainable crossword puzzle

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Across
  1. 2. catalysts
  2. 5. organic matter
  3. 7. erosion and flooding
  4. 11. equal parts
Down
  1. 1. soil minerals
  2. 3. largest particles
  3. 4. are horizons
  4. 6. medium sized particles
  5. 8. acidity
  6. 9. inorganic nitrogen
  7. 10. smallest sized particles