An entirely new approach based on remote sensing data to calculate the nitrogen nutrition index of winter wheat
ZHAO Yu, WANG Jian-wen, CHEN Li-ping, FU Yuan-yuan, ZHU Hong-chun, FENG Hai-kuan, XU Xin-gang, LI Zhen-hai
Journal of Integrative Agriculture . 2021, (9): 2535 -2551 .  DOI: 10.1016/S2095-3119(20)63379-2