Zusammenfassung der Ressource
Sources Of Food
- Space limitation
- increase in world population
- Crops
- Soil
- Appropriate pH
- pH meter
- Universal
indicator
- Litmus paper
- fertilisers
- Nutrients
- water
- Air
- Sunlight
- Growth
- Growth
- plant hormones
- Ripening of Fruits
- Weed Killers
- Biological control
- Natural enemies
- Chemical control
- Herbicides
- Pesticides
- Pollution
- Fertilisers
- Ar Pollution
- Water pollution
- Inproving plant and animal varieties
- Intensive production methods