SOURCES OF FOOD

SONG  JUN XIAN
Mind Map by SONG JUN XIAN , updated more than 1 year ago
SONG  JUN XIAN
Created by SONG JUN XIAN almost 4 years ago
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SONG JUN XIAN
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SOURCES OF FOOD
1 space limitation
1.1 increase in world population
2 intensive production
2.1 improving plant and animal varieties
3 CROPS
3.1 SOIL
3.1.1
3.2 NEED
3.2.1 air
3.2.2 water
3.2.2.1 required for
3.2.2.1.1 growth
3.2.2.1.1.1 regulated by
3.2.2.1.1.1.1 plant hormones
3.2.2.1.1.1.1.1 also used in
3.2.2.1.1.1.1.1.1 ripening of fruits
3.2.2.1.1.1.1.1.2 weed killers
3.2.3 sunlight
3.3 can be protected by
3.3.1 biological control
3.3.1.1 which inculde the use of
3.3.1.1.1 Natural enemies

Annotations:

  • Animal (e.g)rat destroys crops such as corn and fruits--->Snake Aphids feed on the leaves and stalks of crops---->Ladybird Beetle
3.3.2 chemical control
3.3.2.1 which comprises
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