[1] [1] Stevens A, Van Wesemael B, Bartholomeus H, et al. Geoderma, 2008, 144(1-2): 395-404.

[2] [2] Tian Y C, Zhang J J, Yao X, et al. Geoderma, 2013, 202: 161.

[3] [3] Hummel J W, sudduth K A, Hollinger S E. Computers and Electronics in Agriculture, 2001, 32(2): 149.

[4] [4] Ben-Dor E, Banin A. International Journal of Remote Sensing, 1995, 18: 3509.

[5] [5] Chang C W, Laird D A, Hurburgh C R. Soil Science, 2005, 170(4): 244.

[6] [6] Shi T Z, Cui L J, Wang J J, et al. Plant and Soil, 2013, 366(1-2): 363.

[8] [8] Thulin S, Hill M J, Held A, et al. International Journal of Applied Earth Observation and Geoinformation, 2012, 19: 322.

[9] [9] Hansen P M, Schjoerring J K. Remote Sensing of Environment, 2003, 86: 542.

[10] [10] Nguyen H T, Lee B W. European Journal of Agronomy, 2006, 24: 349.

[11] [11] Cho M A, Skidmore A, Corsi F, et al. International Journal of Applied Earth Observation and Geoinformation, 2007, 9: 414.

[12] [12] Sun T, Lin H J, Xu H R, et al. Postharvest Biology and Technology, 2009, 51: 86.

[13] [13] Kokaly R F, Clark R N. Remote Sensing of Environment, 1999, 67: 267.

[14] [14] Schmidt K S, Skidmore A K. International Journal of Remote Sensing, 2001, 22: 3421.