Food Supply,plant Growth And Productivity Flashcards
What is food security
Food security is the ability of human populations to access food of sufficient quality and quantity.
What does the increase in human population and concern for food security lead to
Leads to a demand for increased food production.
Why must food production be sustainable
Food production must be sustainable and not degrade the natural resources on which agriculture depends
What does agricultural production depend on?
Agricultural production depends on factors that control photosynthesis and plant growth.
What is the area to grow crops like
It is limited
What does an increase in food production depend on?
An increase in food production will depend on factors that control plant growth.-:
- Breeding of higher yielding cultivars.
- use of fertiliser.
- protecting crops from pests.
- diseases and competition.
All food production is dependant on what?
All food production is dependant ultimately upon photosynthesis
Examples of plant crops
• Cereals
• Potato
• Roots
• legumes
What do breeders seek to develop?
Breeders seek to develop crops with higher nutritional values , resistance to pests and diseases, physical characteristics suited to rearing and harvesting as well as those that can thrive in particular environmental conditions.
Why do livestock produce less food per unit area than crop plants?
Livestock produce less food per unit area than crop plants due to loss of energy between trophic levels.
Where is livestock production often possible?
Livestock production is often possible in habitats unsuitable for growing crops.