[1] Sofalian O, Mohammadi S A, Aharizad S, et al. J. Turkish Journal of Agriculture and Forestry, 2006, 30(6): 399.
[2] Romanov P J. NATO Science for Peace and Security Series C: Environmental Security. Dordrecht: Springer 2011. 81.
[3] FENG Meichen, YANG Wude, CAO Liangliang, et al. Agricultural Science in China, 2009, 8(9): 1053.
[5] Starks P J, Zhao D, Brown M A. Grass and Forage Science, 2008, 63(2): 168.
[6] Arafat S M, Aboelghar M A, Ahmed E F. Advances in Remote Sensing, 2013, 2(2): 63.
[7] Vane G. Remote Sensing of Environment, 1993, 44(2): 109.
[10] Horler D N H, Barber J, Barringer A R. International Journal of Remote Sensing, 1980, 1(2): 121.
[11] Boochs F, Kupfer G. International Journal of Remote Sensing, 1990, 11(10): 1741.
[13] Stroppiana D, Boschetti M, Brivio A P, et al. International Journal of Remote Sensing, 2009, 30(18): 4643.
[14] Song Shalei, Gong Wei, Zhu Bo, et al. Journal of Photogrammetry and Remote Sensing, 2011, 66(5): 56.