3.1 Flashcards
Food security definition
Ability of human populations to access food of sufficient quality and quantity.
Food security problem
Approximately 30% of the world’s population is liable to starvation and malnutrition
Food production must be
Sustainable and not degrade the natural resources that agriculture depends on.
Things needed for food security
- Quantity
- Quality
- Acess
Quantity meaning
Sufficient food avaliable for all
Quality meaning
Food is nutritious and varied to provide a balanced diet
Access meaning
People have economic means to obtain the avaliable food.
Food is distributed throughout a population.
An increase in human population and concern for food security leads to a demand for
Increased food production
Trophic level
An organisms position in the food chain
All food production is dependent on
Photosynthesis
As you move along a food chain
Energy is lost between each trophic level and and the next
Livestock produce less food per unit area of land compared to
Plant production as there is more energy lost between the extra trophic level
Land planted with crops produces more food than
The same land planted with grass to feed livestock
Plant crop examples
- Wheat
- Beans
- Roots
Increasing food production depends on
Factors that control plant growth
Factors that control photosynthesis and plant growth
- Soil factors
- Crop factors
- Environmental factors
Soil factor examples
- Area farmed
- Fertilisers
- Soil quality
- Drainage
