Presentation on theme: "AGRICULTURE AND RURAL LAND USE. DEVELOPMENT AND DIFFUSION NEOLITHIC REVOLUTION – w,w,w,w SECOND AG REVOLUTION – w,w,w,w THIRD AG REVOLUTION – w,w,w,w."— Presentation transcript:
DEVELOPMENT AND DIFFUSION NEOLITHIC REVOLUTION – w,w,w,w SECOND AG REVOLUTION – w,w,w,w THIRD AG REVOLUTION – w,w,w,w
AG PRODUCTION HEARTHS Upper SE Asian Mainlands, Lower SE Asian Mainland, Eastern India, SWA, East African Highlands, Meso- America North-Central China, Mediterranean Basin, Western Sudan, Andean Highlands, Eastern South America
AG PRODUCTION VARIANCES Nigerian women spread seeds Slash and burn in Peru Center pivot irrigation in Oregon
Isolated state – no trade connections Possessed only one market Located centrally in the state Uniform soil, climate, level of terrain All farmers lived equal distance from market and had equal access to it Farmers sought maximum profits
THIRD AG REVOLUTION The complex of seed and management improvements adapted to the needs of intensive agriculture that have brought larger harvests from a given area of farmland 1965-1995, world cereal production rose 90%, mostly due to increased crop yields rather than expanding cropland
THIRD AG REVOLUTION 1965-1983 average yields Rice 52%; Wheat 66%;
THIRD AG REVOLUTION Advancements in PINGS (Mali) has helped delay famine and extended life expectancies PEDS havent slowed down – always pushing to find new technologies
THIRD AG REVOLUTION HIGH INPUT – HIGH YIELD CROPS New variations of seeds/plants Irrigation Mechanization Fertilization Use of pesticides More food
THIRD AG REVOLUTION Irrigation has destroyed large tracts of land Ground water depletion Conflict between agricultural societies and urban sprawl
CHARACTERISTICS OF THE THIRD AG REVOLUTION Blending of primary, secondary, tertiary, and quaternary sectors
CHARACTERISTICS OF THE THIRD AG REVOLUTION Increased mechanization Development of biotechnology
HOPES & FEARS ABOUT THE FUTURE Will we be able to produce enough food for the worlds people? At what cost – economic and environmental?
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