Quick, how to you spell sweetpotato? If you think we just did it wrong, think again ? that's the scientific way. And if you grow sweetpotatoes in North Carolina, that matters. And what North Carolina sweetpotato growers think matters because they grow more than two-thirds of the U.S. sweetpotato crop! How did one state become so dominant in a single industry? Believe it or not, tobacco played a role...