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Published byJose Bird Modified over 11 years ago
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Yuma Valley - Arizona state - USA
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Yuma Yuma is in the extreme south west of Arizona – on the R. Colorado next to California and the border with Mexico.
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Temperature – very hot. 35*C in summer. Annual rainfall total from 1993 to 2002– (about 3 inches) 8cms a year on average
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Yuma – Winter Salad Bowl Capitol of the USA
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Colorado river - irrigation channel Lot of evaporation loss.
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Furrow irrigation
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Yuma – sprinkler system Uses less water than furrow irrigation. Cools the soil surface temperature when salad starting to grow.
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Central pivot sprinklers Circular fields
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Drip irrigation – feeds water slowly and directly to roots
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Dole Salad Packing Factory
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Mexican migrant workers Seasonal low paid work
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Competition for Water
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Colorado water runs out.
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Rising costs Too much fertiliser used
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Rise of organic farming
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Farming is run by big businesses Agribusiness Small family farms dying out
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Young people need specialist education for a career in farming
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The River Colorado One giant plumbing system?
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Is the farming sustainable?
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Back to the Desert?
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