Lecture 12 Economic Geo 4/11/2013 7:02:00 AM
Different agricultural systems
Subsistence V Commercial – characteristics of each
Food supply in the 21st. Century
what is the dilemma?
What is scientific agriculture
What was the Green Revolution
characteristics, mechanisms, issues
The Green Revolution-Impacts & Issues
Food security – monoculture, genetic range
Displacement of farmers
Capital requirements ( requires a lot of money)
Migration onto marginal (pooer) lands
Marginalisation of females
*poorer farmers pushed onto less fertile land because they cannot afford
machinery (increase in famine and hunger = relates to carrying capacity)
Increased environmental pressures
Soil erosion, salinization, contamination of water (moving trees causing
more wind = soil erosion as topsoil is being harmed loss in soil fertility)
Destruction of traditional systems
Is the green Revolution Sustainable?
It might be successful b/c it increased food supply but not a varity of foods
in diet (no balance)
Increased food but meeting food requirements?
No because a lot of food but no variety no balance
Sustainable use of resources?
People losing rights to land and famine and deprivation and how are these
systems culturally sustainable Scientific Animal Management
Reduce time to slaughter (only work if food supply is increase) increase
rapid tissue growth
Increase body weight
Increase output – milk, eggs etc.
*the reason we rare animals is to kill them but this is not the way of
producing food (feeding animal derail crops and then killing it and iting it)
there seems to be energy loss because you feed animal and kill it and then
Breeding of animals
trait selection (some are able t produce meat and some are able to produce
specialization beef, dairy etc.
Housing of animals
control feeding ( build up body tissue quickly)
* reduce heat and movement and light = controlling tissue growth- if they
don’t sleep they eat and tissue grows, heat prevents energy loss
Increased purchase of food to feed animals Manipulation of food products
Animal by products
Use of steroids & antibiotics
*stop the prevention of diseases from contracting