Sustainable biomes
Across
- 2. A community of plants and animals occupying a large area of the earth's surface.
- 6. A water-based community of plants and animals.
- 13. The transformation of fertile land into relatively dry desert.
- 17. A land-based community of plants and animals.
- 19. Defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient rich materials.
- 21. Can supply large volumes of produce in a relatively small area, such as poultry or vegetable farms.
- 22. Individuals or corporations taking over productive land using it for purposes other than growing food.
Down
- 1. A farming system that involves moving from site to site as soil fertility declines.
- 3. Plant, animal or other organisms that are not native to an area, and whose introduction has negative effects on its new environment.
- 4. State of not having enough food to develop or function adequately.
- 5. Removal of trees and other plant life from a forested area, either by cutting down or burning; usually carried out to clear the land for farming.
- 7. A measurement of the amount of a crop harvested per unit of land.
- 8. When farmers grow food crops to feed themselves and their families. Farm output is targeted to survival and is mostly for local requirements with little or no surplus trade.
- 9. the variety of all life forms on earth- the different plants, animals and micro-organisms, their genes, and the terrestrial, marine and freshwater ecosystems of which they are a part of.
- 10. As water moves down through the soil, it dissolves and carries away some of the nutrients that plants use. This is called leaching.
- 11. resulting from human activity.
- 12. naturally occurring salinity.
- 14. System farming that adapts modern technology to analyse aspects of the environment to bring out better economic and environmental outcomes.
- 15. Decline in the quality of soil due to human activities.
- 16. A condition in which all people at all times have enough safe nutritious food to sustain a healthy life.
- 18. the presence of salts and bicarbonates, in soil and water.
- 20. Type of farming that requires large areas of land (e.g dairy farming, which needs to provide grazing for cattle).