Source: Victoria Wresilo, SPECTRUM LOCAL NEWS, 6/3/21

 More than 100 operations across North Carolina now use negative horizontal ventilation to increase profits and shelf life of sweet potatoes for customers. It's a method of forced air cooling, invented by N.C. State Professor Dr. Mike Boyette. “You can grow sweet potatoes from Ontario, to all the way down to Uruguay and all over the world," Boyette said. "But only the places that have invested in the infrastructure we got here...that can keep them, I mean, I have seen potatoes like this, out of the ground for 13 months.” 

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