Subsurface placement of controlled-release blended fertilizers mitigates ammonia volatilization by promoting nitrogen transformation in rice fields - Sajjad Ahmad; Muhammad Yousaf Nadeem; Shen Gao; Quanxin Li; Yanfeng Ding; Zhenghui Liu; Yu Jiang; Weiwei Li; Ganghua Li (Agriculture, Ecosystems & Environment, 2025)