Producing food crossword

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Across
  1. 5. Leaves turn this colour when Nitrate levels are low
  2. 9. Transports sugar through the leaf
  3. 10. Animals living in cages are on a _________ farm
  4. 11. Part of the leaf responsible for gas exchange
  5. 13. Fed to animals to prevent disease
  6. 14. A gas produced through photosynthesis
  7. 17. Made of cellulose
  8. 18. No rainfall
Down
  1. 1. Added to soil to improve plant growth
  2. 2. Transports water through the leaf
  3. 3. Absorbed by plants for photosynthesis
  4. 4. Type of farming that produces a high yield
  5. 6. The top of the leaf has a ______ cuticle
  6. 7. Toxic chemicals that kill insects, fungus and weeds
  7. 8. This layer is where photosynthesis occurs in the leaf
  8. 9. An organism that eats a crop
  9. 12. This type of farming produces a low yield of food and is expensive
  10. 15. Green substance found in plant cells
  11. 16. Glucose stored