Zusammenfassung der Ressource
Sources
of Food
- Crops
- Can be protected by
- Biological control
- Which include
the use of
- Natural
enemies
- Chemical control
- which
comprises
- Herbicides
- Pesticides
- can also cause
- Pollution
- such as
- Air Pollution
- Water Pollution
- Soil
- requires
- Fertilisers
- Nutrients
- Appropriate
pH
- Litmus
paper
- Universal
indicator
- pH
Meter
- Need
- Water
- required for
- Growth
- regulated by
- Plant Hormones
- also used in
- Ripening
of fruits
- Weed
killers
- Sunlight
- Air
- Can Be Increased by
- Intensive production
methods
- Improving plant and animal
varieties
- such as
- need to be increased due to
- Space
limitation
- Increase in world
population