[3] Marchetti A, Piccini C, Francaviglia R, et al. Pedosphere, 2012, 22(2): 230.
[5] Stoner E R, Baumgardner M F. Soil Science Society of America Journal, 1982, 45(6): 1161.
[6] Chen F, Kissell D E, West L T, et al. Soil Sci. Soc. Am. J., 2000, 64(2): 746.
[7] Fox G A, Sabbagh G J. Soil Sci. Soc. Am. J., 2002, 66(6): 1922.
[10] Condit H R. Photogramm. Eng., 1970, 36: 955.
[11] Frazier B E, Cheng Y, Frazier B E, et al. Remote Sensing of Environment, 1989, 28(89): 317.