Across
- 1. the supply of water to land or crops to help growth, typically through channels
- 5. avoidance of depletion of natural resources in order to maintain an ecological balance
- 7. make or form (sloping land) into a number of level flat areas resembling a series of steps
- 9. (of farmland) plowed and harrowed but left unsown for a period in order to restore fertility as part of a crop rotation or to avoid surplus production
- 10. movement and exchange of organic and inorganic matter back into the production of matter
- 11. a simple procedure involving not planting the same crop in the same soil for a period of years
- 13. the weather conditions prevailing in an area in general or over a long period
- 15. the cultivation of a single crop in a given area
- 16. proportion of incident light or radiation reflected by a surface
- 18. (of food/farming methods) produced or involving production without the use of chemical fertilisers, pesticides or other artificial agents
- 19. the quality or high degree of being saline
- 21. the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
- 25. a large, naturally occurring community of flora and fauna occupying a major habitat (e.g forest/tundra)
- 26. an act of seizing land in an opportunistic or unlawful manner
- 27. when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food to meet dietary needs for a productive and healthy life
- 28. general term for the electromagnetic radiation emitted from the sun
- 29. a biological community of interacting organisms and their physical environment
Down
- 2. organisms in which the genetic material has been altered in a way that does no occur naturally by mating and/or natural recombination
- 3. a state of balance between continuing processes in the biome
- 4. also known as the 'water cycle'; it is the normal water recycling system on Earth
- 6. total food supply
- 8. native and restricted to a certain place
- 12. a large increase in crop production in developing countries achieved by the use of fertilisers, pesticides and high-yield crop varieties
- 14. a unit of measurement of air pressure
- 17. the angular distance of a place north or south of the earth's equator usually expressed in degrees and minutes
- 20. a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period
- 22. the rearing of aquatic animals or the cultivation of aquatic plants for food
- 23. the variety of life in the world or in a particular habitat or ecosystem
- 24. agriculture conducted on commercial principles, especially using advanced technology