Farming Flashcards

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1
Q

Recall the examples or pesticides

A

Insecticides to kill insects
Fungicides to kill fungi
Herbicides to kill plants

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2
Q

What does intensive farming mean?

A

It means trying to produce as much food as possible from land, plnats and animals available.

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3
Q

Describe how intensive farming methods can increase productivity limited to:

A
  • fish farming - breeds huge numbers of fish in enclosed nets in the sea or lakes
  • glasshouses
  • hydroponics - growing plants without soil
  • battery farming - raising chickens in cages
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4
Q

Describe organic farming methods

A
  • no artificial fertilisers

- no pesticides

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5
Q

Describe how pests can be controlled biologically by introducing predators

A

Biological control reduces the population of the pest but does not completely remove the pest

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6
Q

Explain the disadvantages of using pesticides

A
  • pesticides may enter and accumulate in food chains
  • pesticides may harm organisms which are not pests
  • some pesticides are persistent
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7
Q

Describe how plants can be grown without soil (hydroponics)

A

Plants grow with their roots in a solution then minerals needed for healthy plant growth are added to the solution.

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8
Q

Describe possible uses of hydroponics

A

Glasshouse tomatoes

Plant growth in areas of barren soil

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9
Q

Drawback and advantage of intensive farming

A

May be efficient but raises ethical dilemmas

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10
Q

Explain the advantages and disadvantages of hydroponics

A
  • better control of mineral levels and disease
  • lack of support for plant
  • required addition of fertilisers
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11
Q

Describe organic farming methods

A
  • use of animal manure and compost
  • crop rotation including use of nitrogen-fixing crops
  • weeding
  • varying seed planting times
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12
Q

Explain the advantages of organic farming

A
  • livestock have space to roam
  • food crops and the environment are not contaminated with artificial fertilisers or pesticides
  • soil fertility is maintained through the use of organic fertilisers, and the soil erosion is limited
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13
Q

Explain the disadvantages of organic farming

A
  • less efficient as some crops and the energy they contain are lost to pests and diseases
  • free-roaming livestock use mire energy and lose more body heat. This requires more food to increase their body mass.
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14
Q

Explain the advantages of biological control

A

No need for chemical pesticides

Does mot need repeated treatment

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15
Q

Disadvantages of biological control

A

Predator may not eat pest
May eat useful species
May increase out of control
May not stay in the ares where it is needed

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16
Q

Explain how removing one or more organisms from a food chain or web may affect other organisms

A

Their population will decrease

17
Q

What are pesticides?

A

They kill pests which are any organisms that damage crops

18
Q

Explain how intensive food production improves the efficiency of energy transfer by reducing energy transfer

A
  • to pests, including competing plants (weeds)

- as heat from farm animals by keeping them penned indoors (battery farming) so that they are warm and move around less