[3] [3] Xie C, He Y. Sensors, 2016, 16(5): 676.

[4] [4] Yuan L, Huang Y, Loraamm R W, et al. Field Crops Research, 2014, 156: 199.

[5] [5] Zhang X, Liu F, He Y, et al. Biosystems Engineering, 2013, 115(1): 56.

[7] [7] Yang C, Odvody G N, Fernandez C J, et al. Precision Agriculture, 2014, 16(2): 201.

[9] [9] Mohanty S P, Hughes D P, Salathé M. Frontiers in Plant Science, 2016, 7: 1419.

[12] [12] Bashish D, Braik M, Bani-Ahmad S. Information Technology Journal, 2011, 10(2): 267.

[13] [13] Muthukannan K, Latha P, Selvi R P, et al. Journal of Engineering and Applied Sciences, 2015, 10(4): 1913.

[14] [14] Verma T, Dubey S. Advances in Computational Sciences and Technology, 2017, 10(5): 721.

[15] [15] Singh V, Misra A K. Information Processing in Agriculture, 2017, 4(1): 41.