Incorporating iron oxide nanoparticles in polyvinyl alcohol/starch hydrogel membrane with biochar for enhanced slow-release properties of compound fertilizers - Jiawei Lu; Mengqiao Wu; Linping Luo; Ruohui Lu; Jie Zhu; Yongfu Li; Yanjiang Cai; Hai Xiang; Chengfang Song; Bing Yu (Carbohydrate Polymers, 2025)