By Basil Waugh
Vermont farms have built up a massive phosphorus surplus—one that is growing at an estimated 1,500 tons per year—as farmers continue to import large quantities of animal feed and fertilizer, a new University of Vermont study says.
Animal feed imports are Vermont’s leading source of new phosphorus, adding to the state’s 240,000-ton surplus, and impacting phosphorus reduction efforts. Photo: Flickr/Creative Commons.