3.5 Food resources

external image food-photo.jpg

3.5.1: Outline the issues involved in the imbalance in global food supply.

"There is enough food on the world to feed us all, however there is an imbalance in the food supply globally. Many people from the LEDCs are suffering from not getting enough energy, proteins and minerals. Around 3/4 of the world’s population is not eating enough and an average of 1 million are going hungry, the majority of these people lives in the LEDCs. It is estimated that every 6 seconds a child dies of hunger.
The price of food plays a major role here, if prices were to just increase by 10% it could lead to an increase of 40 million people in food poverty. However even though there is such a huge group of people in need of food there is a surplus of food in the MEDCs with markets producing to much food for the population.
This has lead to people in the MEDCs to consumer more food then they need as the MEDCs increased wealth has allowed them to buy more. There are import tariffs imposed by the MEDCs to make the import of food more expensive, which can ruin the exporting countries.
In the LEDCs they make money for the country through food production, from crops such as sugar cane and tobacco. So they need this production for making money but when the MEDCs increase import tariffs the LEDCs are in trouble.
MEDCs want to make money from products in the country and not let the imported goods become the cheaper choice. Despite all this prices of food in the MEDCs is fairly expensive as seasonal foods have disappeared as imports fill gaps. The struggle in the LEDCs to make money has caused prices to rise, this makes it difficult for the population to afford local productions.
Climate changes have also affected the LEDCs as droughts for example reduce the amount of growing land. Global warming could lead to countries suffering from high temperatures which could destroy crops.
As more land is used for settlement and industry, there is an increase in intensifying production on existing farm land. MEDCs food production is complex as it involves high levels of technology, low labour and high fuel costs. MEDCs have become more technocentric.
Agriculture in the LEDCs are in contrast and have low levels of technology, lack of capital and high levels of labour."

  • High food supplies for small population
  • Cause problem such as obesity
  • Low cost of food and all seasonal-supplies of food
  • Low food supply for large population
  • Cause problem such as malnutrition and under-nourishment
  • Struggle to produce enough food and food price remain high
  • In LEDC food production is used as a way to generate foreign currency however their farm produces are noncompetitive.
àCause in imbalance food distribution
-Ecological: some climate and soils are better for food production
-Economic: advance technology and money can overcome ecological limitation (transportation of water)
-Socio-political: underinvestment in rural area and rapid area in LEDC; poor human health weaken available labor force

external image foodman.jpg

3.5.2: Compare and contrast the efficiency of terrestrial and aquatic food production systems

àTerrestrial vs Aquatic
-Consume from lower trophic level e.g. cow/rice due to taste and cultural demand
-Consume from higher trophic level e.g. salmon due to taste and cultural demand
-Less efficiency
-higher efficiency however the initial of available solar energy is slower due to reflection and absorption of light by water
*Second Law of Therodynamics
external image homePageImage.jpg

3.5.3: Compare and contrast the inputs and outputs of materials and energy (energy efficient), the system characteristics, and evaluate the relative environmental impacts for two named food production systems.


3.5.4: Discuss the links that exist between social systems and food production systems.

Shifting Cultivation
Extensive subsistence farming
-Slash and burn and its widely used by those who cannot afford other methods of land clearance
-Fertilizers in the soil will last for a while and people are force to move after it
-Low population allows it and affected by cultural beliefs e.g. choice of site for land clearance
-High demand for food due to high population which in turn allow for high labor inputs and it require low technology
-High rainfall and warm temperatures support it
-Intensive subsistence farming
-After WWII concern of self-sufficiency raise and smaller farms were combined to create large area of the same crops
-Intensive farming to produce food for commercial use
-Maxim productivity and profit to compete in a global market
-High impacts on the environment

Shifting Cultivation
external image slash-and-burn-diagram.png

Furthur Reading: http://yesitsyomoma.wordpress.com/2011/04/03/revision-topic-3-5-food-resources/