Research Article

Prediction of Soil Available Boron Content in Visible-Near-Infrared Hyperspectral Based on Different Preprocessing Transformations and Characteristic Wavelengths Modeling

Figure 4

Average spectroscopy after various pretreatment transformations. (a) Average spectrum without Savitzky–Golay(SG) treatment; (b) average spectrum with SG method.
(a)
(b)