1. Li, M.Z.: Evaluating Soil Parameters with Visible Spectroscopy. Transactions of the CSAE 19(5), 36–42 (2003)
2. Al-Abbas, A.H., Swain, P.H., Baumgardner, M.F.: Relating Organic Matter and Clay Content to the Multispectral Radiance of soils. Soil Science 114(6), 477–485 (1973)
3. Li, M.Z., Shibusawa, S., Sasao, A.: Spectroscopic Approach to Soil Parameters Sensing. In: Nir 1999: International Conference on Agricultural Engineering, Beijing, pp. 98–103 (1999)
4. Sun, J.Y., Li, M.Z., Zheng, L.H.: Real-time Analysis of Soil Moisture, Soil Organic Matter, and Soil Total Nitrogen with NIR Spectra. Spectroscopy and Spectral Analysis 26(3), 426–429 (2006)
5. Zheng, L.H., Li, M.Z., An, X.F.: Forecasting Soil Parameters Based on NIR and SVM. Journal of Agricultural Engineering 26(2), 81–87 (2010)