Study on hyperspectral monitoring model of soil total nitrogen content based on fractional-order derivative. - Chenbo Yang; Meichen Feng; Lifang Song; Binghan Jing; Yongkai Xie; Chao Wang; Wude Yang; Lujie Xiao; Meijun Zhang; Xiaoyan Song (Comput. Electron. Agric., 2022)