1 / 25

Food Production and the Environment

Food Production and the Environment. The Carbon Cycle. Carbon dioxide in the air. Carbon dioxide in the air. Green plants use carbon dioxide to make their food. Carbon dioxide in the air. Green plants use carbon dioxide to make their food. Green plants are eaten by animals.

olin
Télécharger la présentation

Food Production and the Environment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Food Production and the Environment The Carbon Cycle

  2. Carbon dioxide in the air

  3. Carbon dioxide in the air Green plants use carbon dioxide to make their food

  4. Carbon dioxide in the air Green plants use carbon dioxide to make their food Green plants are eaten by animals

  5. Carbon dioxide in the air respiration Green plants use carbon dioxide to make their food Green plants are eaten by animals

  6. carbon dioxide in the air respiration green plants use carbon dioxide to make their food green plants are eaten by animals dead remains of plants and animals

  7. carbon dioxide in the air respiration green plants use carbon dioxide to make their food green plants are eaten by animals dead remains of plants and animals decay by fungi and bacteria

  8. Decay • Fungi and bacteria are responsible for the decay of dead organisms.

  9. Decay • In order to be able to carry out decay, fungi and bacteria need: • Oxygen • Moisture • The correct temperature

  10. The Nitrogen Cycle

  11. nitrogen in the air

  12. nitrogen in the air fertilizers fertilizers

  13. nitrogen in the air fertilizers fertilizers waste substances e.g. faeces

  14. nitrogen in the air lightning fertilizers fertilizers waste substances e.g. faeces

  15. nitrogen in the air lightning fertilizers fertilizers waste substances e.g. faeces Nitrogen-fixing bacteria in the soil

  16. nitrogen in the air lightning fertilizers fertilizers waste substances e.g. faeces Nitrogen-fixing bacteria in the soil Nitrogen-fixing bacteria in the root nodules of clover

  17. nitrogen in the air lightning fertilizers fertilizers waste substances e.g. faeces Nitrogen-fixing bacteria in the soil Nitrogen-fixing bacteria in the root nodules of clover dead remains of plants and animals

  18. nitrogen in the air lightning fertilizers fertilizers waste substances e.g. faeces Nitrogen-fixing bacteria in the soil Nitrogen-fixing bacteria in the root nodules of clover dead remains of plants and animals nitrates in the soil

  19. lightning fertilizers fertilizers waste substances e.g. faeces Nitrogen-fixing bacteria in the soil Nitrogen-fixing bacteria in the root nodules of clover dead remains of plants and animals nitrates in the soil denitrifying bacteria in the soil break down nitrates

  20. The nitrogen cycle • Living things need nitrogen to make protein. • They can not use the nitrogen in the air • The nitrogen in the air must be changed to nitrates before plants can use it.

  21. The nitrogen cycle • Animals get their nitrogen by eating plants.

  22. The nitrogen cycle • The roots of some plants (e.g. clover, pea & beans) have swellings called root nodules on them. • Nitrogen-fixing bacteria living in these nodules change nitrogen in the air into nitrates.

  23. The nitrogen cycle • The nitrogen-fixing bacteria are essential to maintain the fertility of the soil. • Without them food yields would rapidly fall.

More Related