Optimizing nitrogen use efficiency in European livestock systems: From feed to plant growth Epper, Carole A. Zavattaro, Laura Velhof, Gerard L. Thuriès, Laurent Steinsberger, Thomas Sorensen, Peter Richards, Karl Oberson, Astrid Möller, Kurt Merbold, Lutz Menzi, Harald Liebisch, Frank Levavasseur, Florent Leiber, Florian Kupper, Thomas Krol, Dominika Janke, David Hofmeier, Maximilian Hoekstra, Nyncke J. Guillaume, Thomas Gilgen, Anina Ghiasi, Shiva Frick, Hanna Dragoni, Frederico Diaz de Otalora, Xabier Chadwick, David R. Cavalli, Daniele Bretscher, Daniel Bischoff, Wolf-Anno Bechini, Luca Argento, Francesco Amon, Barbara Ammann, Christof Mayer, Jochen other https://orgprints.org/id/eprint/56647/ /id/eprint/56647/1/Epper%20et%20al.%20%282025%29_NUE%20Livestock%20Systems_Adv%20Agron_50064.pdf restricted access 2025 plant growth nitrogen use efficiency nitrogen loss reduction manure management feeding strategies Abacus FiBL50064