Urea-N Activated Biochar Effectively Suppresses CO 2 and N 2 O Emissions from Farmland Soil. - Wang, Xiao; Zheng, Yudong; Liu, Xuetong; Liu, Dan; Cao, Caiyun; Li, Kejiang; Lu, Ping; Yang, Peiling; Wang, Huiguang; Zheng, Chunlian; Dang, Hongkai (Agronomy, 2025)