Alvarez-Lopez, Vanessa, Marcos Lado-Liñares, Antonio Rigueiro-Rodríguez, and María Rosa Mosquera-Losada. 2026. “Sewage Sludge Affects Pasture Productivity and Nitrogen Use Efficiency in a Grassland Field Experiment”. Spanish Journal of Agricultural Research 23 (4), 21400. https://doi.org/10.5424/sjar/2025234-21400.