Food Supply issues Flashcards
What is subsistence farming
When just enough food is grown to feed the family eg Africa and Asia
What is intensive farming
When you produce as much as possible from the land
May be capital intensive or labour intensive
What is extensive farming
Low capital and labour input
Produces less food
Over a large area with low yield
Arable farming
Crops
Pastoral farming
Animals.
Effects of globalisation on environment
- Deforestation - land wanted for increasing area available for food production
- bigger area farmed bigger impact
- food exports and transportation - carbon dioxide released
What caused the change in demand of food
Eg seasonal products
High value exports from poorer countries
A rising culture of high consumption
Rising incomes in developed countries - affordable for people
Increasing popularity of exotic products
What are the negative effects of importing seasonal and high value foods
- Food saftey and and agricultural health concerns
- Importing increases food miles - pollution
- Lower food security as less food is produced due to cheaper imports
- Food shortages due to shortages of good quality land as best land is used to grow high value foods for exportation
Methods of increasing food production
- The green revolution
- Genetic modification
- Land colonisation and land reform
- Commercialisation
- Appropriate technology solutions
What is commercialisation
The change from subsistence farming to commercial farming
What did the green revolution involve
Food production increased though….
- Higher yielding crops
- monoculture- 1 crop over large area
- irrigation technology
- fertalizers
- pesticides
Disadvantages of the green revolution
- costly inputs of fertilisers and pesticides lead some farmers into debt
- high yielding varieties require more weed control
- lower food security - monoculture crops can be wiped out by 1 pest
- monoculture reduces biodiversity
- over irrigation- low ground water levels, salinisation of soils and water
Ways in which crops can be genetically modified
Resistant to disease
Higher yielding
Longer lasting
Resistant to harsh environmental conditions eg drought/ frost
What is land colonisation
When humans move to an area of land that hasn’t been used before for agriculture
Eg they may drain marches and reclaim land from sea
Disadvantages - deforestation
What is land reform
When land is redistributed
It includes.
Breaking down large estates and giving land to landless people
Consolidation of small fragmented farms
Moving land into state ownership
Disadvantages- conflicts over who’s entitled to land
What were the surpluses of food called? Examples
Mountains and lakes
Eg cereals,butter wine
What is commercial farming
The production of crops or livestock to make a profit
Arguments in favour of GM
- They could solve the worlds food shortages and reduce number of chemicals used in production of crops
- large profits can be gained by farming GM crops
- trials of gm soya and maize have done well in the USA and some has been imported to the UK and used as animal feed
Arguments against GM
- health risks which have occurred from other agricultural innovations
- The long term effect of the consumption of GM to humans still unknown
- pollen from GM plants might pollinate nearby plants and crops spreading modification in an uncontrolled way.
- in poorer countries GM crops may only be available to wealthier farmers
Examples of immediate technology
The donkey plough - Africa,Sudan,Ethiopia
Diguettes stone lines eg Burkina Faso
Intermediate technology pumps
What is the donkey plough
Suited to local conditions
Donkeys plough with soft harness, lightweight made of scrap metal
Most have donkeys so poor farmers can plough land and grow more crops to feed family on permanent basis.
Diguettes
Line of stones put along contours of gently sloping farmland
Slow down rainwater so allow ground to soak it up.
Prevents soil erosion and increases depth of soil so they can grow more crops
Intermediate technology pumps
Drilling tube wells for villages that don’t have access to clean water.
Doesn’t require expensive water supplies and maintenance done by local people .
Can help in dry season for rice farming
Spare parts cheap
What is the green revolution
Package of agricultural improvements that has helped transform agriculture in many LEDCs. It’s lead to increases in agricultural production and increasing food security.