KA1a Food Supply

Question 1

what is meant by food security

Answer 1

the ability to access sufficient quality and quantity of food to maintain a healthy population

Question 2

why is there an increased demand for food?

Answer 2

human population growth has increased the demand for food and the concern for food security

Question 3

what should food production be?

Answer 3

sustainable and not degrade the natural resources needed for agriculture

Question 4

what factors does food production depend on

Answer 4

light intensity, growing area, water availability, available nutrients, competition

Question 5

state three methods of improving crop yield

Answer 5

growing higher yielding cultivars, use fertilisers, protecting crops from disease, pests, and competition

Question 6

why does livestock yield less food per unit area than crops

Answer 6

90% of energy is lost between each trophic level in a food chain. therefore the shorter the food chain, the more energy is held in the food which means livestock produce less energy per unit area than crops due to energy loss between trophic levels