[1] C M Brown, S E Howell, D P Hucklesby et al. Agronomy Journal, 63, 274(1971).
[2] A Bergoin, G Martin, P Scheromm et al. Cereal Chemistry, 69, 664(1993).
[3] G W Langdale, R R Sharpe, L A Harper et al. Agronomy Journal, 79, 965(1987).
[4] L A Daigger, G A Perterson, D H Sander. Agronomy Journal, 68, 815(1976).
[5] H G Marshall, G W Roth, R H Fox. Agronomy Journal, 81, 502(1989).
[6] F T Turner, M E Jund. Australian Journal of Experimental Agriculture, 34, 1001(1994).
[8] H Zhu, H Liu, P Wang. International Journal of Remote Sensing, 38, 2117(2017).
[9] J Kleemola, L Pesonen, J Kaivosoja et al. Proc. SPIE, 8887, 88870H(2013).
[10] J Zhang, T Cheng, W Guo et al. Plant Methods, 17, 49(2021).
[11] L Xia, L P Chen, R R Zhang et al. Advances in Animal Biosciences, 8, 833(2017).
[12] L M Lied, I Burud, S Shafiee et al. Computers and Electronics in Agriculture, 183, 106036(2021).
[15] W Lu, H Su, X Yang et al. Remote Sensing, 11, 1598(2019).
[16] C Z Liu, Y F Xia, Y Y Li et al. Expert Systems with Applications, 78, 225(2017).