Deep convolutional neural network coupled with visible-near infrared spectroscopy for accurate estimation of soil Mn content - Tao Hu; Min Zhou; Zhongqi Chen; Zongyu Ni; Chunhui Zhang; Xiaoming Zheng; Yan Feng; Qiusong Chen; Dongdong Pang; Zirou Liu; Chongchong Qi (Journal of Geochemical Exploration, 2026)