A. Sogn, Trine, Ivan Dragicevic, Roar Linjordet, Tore Krogstad, Vincent G. H. Eijsink, and Susanne Eich-Greatorex. “Recycling of Biogas Digestates in Plant Production: NPK Fertilizer Valueand Risk of Leaching”. International Journal of Recycling of Organic Waste in Agriculture 7, no. 1 (January 8, 2018). Accessed June 24, 2026. https://oiccpress.com/ijrowa/article/view/3227.