Leo den Hartog: “Make better use of minerals in pig manure”

Nitrogen emissions are at the heart of a fierce debate about the future of livestock production in the densely populated Netherlands. Former researcher Leo den Hartog advocates a better valorisation of pig manure and closing cycles further. “The importance of innovation remains, even if the herd is shrinking.” Nitrogen emissions have become a major political issue in the Netherlands recently. In many places throughout the country, emission levels are measured that are at odds with Europea