3.1 Food Supply, Plant Growth and Productivity Flashcards

1
Q

Food security

A

the ability of human populations to access food of sufficient quality and quantity

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2
Q

What two factors have led to a demand for increased food production?

A
  • increase in human population
  • concern for food security
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3
Q

food production must be… + what this means

A

sustainable - it cannot degrade the natural resources on which agriculture depends

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4
Q

agricultural production depends on (2)

A
  • factors that control photosynthesis
  • plant growth
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5
Q

the area available to grow crops is…

A

limited

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6
Q

increased food production will depend on factors that control plant growth (3)

A
  • breeding of higher yielding cultivars
  • use of fertiliser
  • protecting crops from pests, diseases and competition
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7
Q

all food production is dependent ultimately on which process?

A

photosynthesis

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8
Q

examples of plant crops (4)

A
  • cereals
  • potatoes
  • roots
  • legumes
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9
Q

breeders seek to develop crops with these qualities (4)

A
  • higher nutritional values
  • resistance to pests and diseases
  • physical characteristics suited to rearing and harvesting
  • can thrive in particular environmental conditions
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10
Q

livestock produces … food per unit area than crops

A

less

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11
Q

why do livestock produce less food per unit area than crops?

A

the loss of energy between trophic levels

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12
Q

livestock production is often possible in habitats which are…

A

unsuitable for growing crops

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