Low-carb diets, such as Atkins and South Beach, prompted the U.S. Potato Board to allocate $4.4 million for an 18-month public relations campaign in 2004 to stress the nutrition factor in potatoes.Growers note that potatoes have more potassium than bananas, and that one serving provides roughly 45 percent of the daily recommended value for vitamin C. They also offer some fiber and other minerals a