Interactions among nutrients govern the global grassland biomass–precipitation relationship - Philip A. Fay; Laureano A. Gherardi; Laura Yahdjian; Peter B. Adler; Jonathan D. Bakker; Siddharth Bharath; Elizabeth T. Borer; W. Stanley Harpole; Erika Hersch-Green; Travis E. Huxman; Andrew S. MacDougall; Anita C. Risch; et al. (Proceedings of the National Academy of Sciences, 2025)