from subsistence to agribusiness
TRANSCRIPT
What is Agriculture?
• Agriculture: raising of crops & livestock to produce food, feed & fuel
• 50% of crops are used to feed people, 50% are used to feed livestock
Percent of Population Directly Engaged in Agriculture Is a Key
Development Statistic World = 36% of populationU.S. = <1% of population
Why does the U.S. have such a low percentage of its labor force engaged in agriculture?
When And Where Did Agriculture Begin?
• Cultivation of root crops– S and SE Asia 14,000 years ago
• 1st Agricultural Revolution– Planned cultivation of seed crops
• SW Asia (Fertile Crescent) 10,000 years ago
– Animal domestication• SW Asia (Fertile Crescent) 8,000 years ago
– Made permanent settlements possible– Led to population growth
Types of AgricultureSubsistence: growing for self and family
Shifting cultivation: relocating cultivation areas from year to year Slash and burn: clearing cultivation areas by cutting foliage and burning to replenish nutrients
Commercial: large-scale farming for profit
Plantation: large estates owned by individuals, families or corporations organized to produce cash crops
Impact of Colonialism on Agriculture Very Significant
• In colonial regions, Europeans tried to end subsistence ag, promote commercial ag– Monoculture: dependence on one ag commodity
• Europe a market for imported ag products
• Europe manufactured and sold finished products made from imported raw materials
If you don’t remember what colonialism is, this is an ideal time to review. Check your Political Geography notes.
2nd Agricultural Revolution
• 1600s - diffused from Europe• Innovations:
– British Enclosure Movement (from common open fields to individual enclosed fields)
– Mechanization– Crop rotation– Scientific breeding
• Innovations led to agricultural surpluses • Food surpluses freed people to move from farm to
factory, leading to Industrial Revolution
Von Thunen’s Model - Know It!• 1826 - von Thunen -
German landowner• Assumptions:
– Flat terrain– Consistent soil and
conditions– No transportation barriers
• Transportation costs determine location of ag activities– Closest to town, produce
most expensive to transport– Furthest from town, produce
cheapest to transport
3rd Agricultural Revolution or “Green Revolution”
• Began in mid-1900s - diffused from core to periphery– Genetically modified seeds, chemical fertilizers
and pesticides, irrigation systems– Improved crop yields– Greatest impact in Asia - eradicated famine in
India
• Controversial– Harmful environmental effects– Too expensive for many subsistence farmers– Agribusinesses profit
Agriculture on the Landscape
Crop circles are actually lands irrigated with center-pivot irrigation systems … big “sprinkers” that rotate in a circle.
Agriculture on the Landscape
•50% of world population lives in villages and rural areas
•Nucleated (clustered) settlement leaves more land open for agriculture
Global Agricultural Patterns
• Determined by climate, soil, agricultural methods, technology, culture, government, history, economics, and much more …
• Impact of colonialism evident– Cotton, rubber, coffee plantations
• Advances in transportation and refrigeration critical• Large agricultural corporations (agribusiness) have HUGE
influence on commodity chains• Many issues of concern: fossil fuel usage, illegal drugs,
overfishing, deforestation, erosion, pesticides, herbicides, pollution, antibiotics, growth hormones, etc.