Energy and Food Production

  • Farming Practices and Productivity
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The use of natural and artificial fertilisers

Natural fertilisers (i.e organic - manure) 

  • cheaper - economic to use as it's using waste materials.
  • may improve soil structure
  • ion content unknown and cannot be controlled
  • animal manures may contain disease which could be harmful to plants

Artificial fertilisers (i.e inorganic - pure chemicals)

  • expensive - value of increased yield must exceed the cost of buying and applying fertiliser
  • can require the use of heavy machinery
  • if used excessively may lead to leaching - eutrophication.
  • may change balance of nutrients in soil causing harm to other organisms. 
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Rearing livestock intensively

Controlling conditions organisms live in.

  • warm sheltered environment - less energy is lost by heat
  • tightly packed and in cramped conditions to prevent movement - less energy lost through respiration/movement.
  • fed on controlled diet high in certain nutrients to increase absorption
  • slaughtered when still growing so more energy is converted to biomass
  • genetically selected for high productivity
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