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Published byTamsyn Dennis Modified over 9 years ago
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Theme Agriculture
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Agricultural Systems The SahelSouthern California San Francisco San Diego
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Source: www.pbs.org http://www.ibe.unesco.org/ The Sahel Burkina Faso Cameroon Chad Gambia Mali Mauritania Niger Nigeria Senegal Sudan
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The Sahel -- Encyclopedia Britannica Arabic Sa hil, semiarid region of western and north- central Africa extending from Senegal eastward to The Sudan. It forms a transitional zone between the arid Sahara (desert) to the north and the belt of humid savannas to the south.
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Source: www.fao.org Cape Verde, Gambia, Guinea Bissau, Senegal, Mauritania, Mali, Burkina Faso, Niger, Chad
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The SahelSouthern California Less developedMore developed Nomadic herdingIrrigation farming Self subsistence farmingCommercial farming Famine Well-known food exporter Similar physical inputs
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Physical inputs Dry climates High solar energy Low rainfall 200-600mm Infertile soil Drought
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Cultural inputs The SahelSouthern California CapitalLowHigh Labour (education level) LowHigh Technology Low High Governance Poor Efficient Market Small + Local Large + Overseas
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Technology The SahelSouthern California Simple, low cost, manualAdvanced, high cost, mechanical Dig wellsBuild dams, canals, reservoirs, drainage systems Plant treeSatellite Eco-friendly fertilizersChemical fertilizers
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Outcome The SahelSouthern California Depends on international aids Gain more than US$2 billion a year
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Technology The SahelSouthern California OvergrazingIncreasing arable land OvercultivationLarge scale construction Deforestation Loss of natural habitats Desertification Pollution Sustainable agriculture
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Technology Advantages productivity quality variety health production cost Disadvantages pollution habitats biodiversity deforestation desertification ecosystem Livelihood + Economy Livelihood + Economy
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