[1] [1] Munson S A, Carey A E. Applied Geochemistry, 2004, 19(7): 1111.

[2] [2] Yan L, Escobar M S, Kaneko H, et al. Chemometrics and Intelligent Laboratory Systems, 2017, 167: 139.

[3] [3] Lin Z D, Wang Y B, Wang R J, et al. Journal of Applied Spectroscopy, 2017, 84(3): 529.

[5] [5] Shen L, Gao M, Yan J, et al. Remote Sensing, 2020, 12(7): 1206.

[6] [6] Padarian J, Minasny B, McBratney A B. Geoderma Regional, 2019, 16: e00198.

[10] [10] Galvao R K H, Araujo M C U, José G E, et al. Talanta, 2005, 67(4): 736.

[11] [11] Li R, Zheng S, Duan C, et al. Remote Sensing, 2020, 12(3): 582.

[12] [12] Mei X, Pan E, Ma Y, et al. Remote Sensing, 2019, 11(8): 963.

[13] [13] Li R, Yin B, Cong Y, et al. Sensors, 2020, 20(21): 6271.