Zusammenfassung der Ressource
Sources Of Food
- Crops
- Soil
- Fertilisers
- Nutrients
- Appropriate pH
- pH meter
- Universal indicator
- Litmus paper
- Sunlight
- Air
- Water
- Growth
- Plant hormones
- Ripening of fruits
- Weed killers
- Chemical
control
- Biological control
- Natural
enemies
- Herbicides
- Pesticides
- pollution
- Air pollution
- Water pollution
- Space limitation
- Increase in world population
- Intensive production methods
- Improving plant and animal varieties