ag hearths where were plants and animals first domesticated?
TRANSCRIPT
Ag Hearths
• Where were plants and animals first domesticated?
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Seed & vegetative Hearths
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Animal Domestication
Subsistence Agriculture
Where & why there?
What are the characteristics of subsistence agriculture?
As we move through this power point think about:
• The characteristics of subsistence ag
• Where and why there?
How about the climate here?
Pastoral Nomadism
• Nomadic herding is a subsistence practice type of grazing. People raise animals for their own food and move them from place to place to areas of available pasture.
• Nomadic herding still exists in the world today in the areas of Northwest Asia, the Middle East, North Africa and the Arctic Tundra.
Characteristics of nomadic herding are:
• Subsistence • Travel • Sparse forage • Covers a large area of the
earth’s surface • Few products enter world trade • Poor quality livestock • Inadequate diets for livestock
and people • Extensive - takes a large land
area to produce enough food for people to survive
• Found in extreme climates (dry• or cold)• Generally in LDCs (Less
Developed Countries)
Shifting Cultivation
Where and why there?
• rainforest soils are not very fertile
• heavy rainfall leaches out the important nutrients from the soil
• Thus natives of rainforests move their area of cultivation every 3-4 years
• Takes place in tropical climates in South America, Africa and South East Asia
Intensive Subsistence Agriculture
Intensive Subsistence Agriculture
• Intensive = lots of labor per acre of output
• Intensive Subsistence Ag = small landholdings
Farmers must work intensively to subsist on their land
Where: Primarily in S. and SE Asia + Southern and eastern China
What: rice and wheat in Asia, corn and potatoes in the Americas
What explains the patterns here?
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Subsistence Ag Summary