Estimating cotton leaf nitrogen by combining the bands sensitive to nitrogen concentration and oxidase activities using hyperspectral imaging. - Jingang Wang; Tian Tian; Haijiang Wang; Jing Cui; Yongqi Zhu; Wenxu Zhang; Xuanmeng Tong; Tianhang Zhou; Zhenkang Yang; Jiaqi Sun (Comput. Electron. Agric., 2021)