sustainable crossword puzzle

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