AUTHOR=Pereyra-Goday Fabiana , Castillo Jesus , Rovira Pablo , Ayala Walter , Lee Michael R. F. , Rivero M. Jordana TITLE=Nitrogen use efficiency in mixed crop-livestock systems: insights for sustainable intensification JOURNAL=Frontiers in Sustainable Food Systems VOLUME=Volume 9 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2025.1522557 DOI=10.3389/fsufs.2025.1522557 ISSN=2571-581X