Soil organic nitrogen rather than fertilizer drives dinitrogen losses in flooded rice systems - Yuanyuan Lei; Zhijun Wei; Kaiye Ye; Kees Jan van Groenigen; Yu Liu; Hongna Cui; Klaus Butterbach-Bahl; Pete Smith; Deli Chen; Shu Kee Lam; William R. Horwath; Wulf Amelung; et al. (Proceedings of the National Academy of Sciences, 2026)