The Rise of the Sweet Potato

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November 23, 2010. Chapel Hill, NC.. At the UNC Hospital Farmer's Market, Stanley Hughes, whose family has been farming for generations, sells 3 types of organic sweet potatoes, including the Purple 414, the O'Henry White and the Beauregard..   The sweet potato seems to be having a comeback, with many farmers increasing their planting of the potato's numerous varieties, as well as many restaurants including it on their menu in various forms such as the ever popular sweet potato fry.