Science Crossword

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Across
  1. 4. Organic substance rich in humus
  2. 5. Used for loosening the soil and weeding
  3. 7. It is rich in specific nutrients
  4. 8. They are the best friends of farmers
  5. 12. The removal or cutting of mature crop
  6. 13. The process of removing unwanted plants
  7. 14. A plant grown on a large scale
Down
  1. 1. A truck-like machine which cultivates the field
  2. 2. Chemicals used to kill weeds
  3. 3. A nitrogen-fixing chemical
  4. 6. Cultivation of a field or land
  5. 9. The removal of grains from the chaff
  6. 10. The product which we obtain from a crop
  7. 11. A tool used to manually cut weeds