A Slideshow from the BBC
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The humble potato in all its thousands of varieties is gaining more and more importance as a food source for developing
nations, and the UN has declared 2008 the international year of the potato.
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The tubers were first cultivated on the Altiplano of modern-day Peru and Bolivia, and after being introduced to Europe
around in the 16th Century, potatoes are now the world's third biggest staple food.
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More potatoes are grown in developing countries than in the developed countries, providing poor nations with valuable
food and some income.
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One of their big attractions is that potatoes provide higher yields in less time than other staple foods.
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Amid the growing food crisis, potato prices have also remained relatively stable as they are not traded much across borders.
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When boiled, a single medium-sized potato contains about 3g of protein, half the daily adult requirement of vitamin C,
and substantial amounts of vitamin B, as well as iron, potassium and zinc.
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Pre-Incan cultures and the Incas used the freezing night temperatures and the hot sunshine of the daylight hours to
dehydrate and freeze-dry potatoes, a process that is still used today.
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About 130 countries are potato producers, growing a total of 315 million tonnes.
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China now is the world's largest potato producer, growing 70 million metric tonnes in 2006, but potatoes are
increasingly popular across Asia.
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Still, experts say it has yet to realise its full potential as a global food source.
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