[2] Stevens A, van Wesemael B, Bartholomeus H, et al. Geoderma, 2008, 144(1): 395.

[3] Fox G A, Sabbagh G J. Soil Sci. Soc. Am. J., 2002, 66: 1922.

[5] Wijewardane N K, Ge Y, Morgan C L S. Geoderma, 2016, 267: 92.

[6] Roudier P, Hedley C B, Lobsey C R, et al. Geoderma, 2017, 296: 98.

[7] Condit H R. Applied Optics, 1972, 11(1): 74.

[10] Vasques G M, Demattê J A M, Rossel R A V, et al. Geoderma, 2014, 223-225(1): 73.

[11] Bu Y, Chen F, Pan J. New Astronomy, 2014, 28(28): 35.

[12] Wu X, Kumar V, Quinlan J R, et al. Knowledge & Information Systems, 2008, 14(1): 1.

[13] Sun Hanmei, Thuan Nguyen, Luan Yihui, et al. Journal of Multivariate Analysis, 2018, 168: 63.

[14] Zhang X, Liu H, Zhang X, et al. Geoderma, 2018, 320: 12.