Food Production

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Across
  1. 3. An example of a fish farmed in freshwater tanks
  2. 4. Chemicals used to kill pests
  3. 6. Fish are fed these, the composition of which can be carefully controlled
  4. 7. Cages offer fish protection from ___________ predators
  5. 10. This gas is essential for photosynthesis, and the levels of it can also be artificially increased (6,7)
  6. 12. Artificial ________ increases the time when photosynthesis can occur
  7. 13. Artificial (or natural) substance added to the soil to give plants nutrients
  8. 14. Uses other organisms to feed on pests (10, 7)
Down
  1. 1. Fish of a similar size are kept together to avoid __________ predation
  2. 2. Glasshouses keep plants free from pests and ____________
  3. 5. This is maintained/ increased in greenhouses due to the 'greenhouse effect' and the combustion of fuels in the winter
  4. 8. Glasshouses increase the rate of ___________ in a plant
  5. 9. The amount of crop harvested in a given area
  6. 11. An example of a fish farmed in Scottish sea lochs