Nitrogen fertilization destabilizes soil structure but enhances macroaggregate-associated carbon and nitrogen under long-term straw incorporation: Insights from a 20-year field trial - Xinyao Zhang; Yanzi Gou; Xiaojie Zhang; Hanyu Guo; Yinduo Wang; Jianglan Shi; Xiangtian Meng; Xiaohong Tian (Soil and Tillage Research, 2026)