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

Table 4

Soil available boron sample statistics.

Type	Number	Max (mg·kg^−1)	Min (mg·kg^−1)	Average (mg·kg^−1)	Standard deviation
Total	188	3.91	0.24	0.87	0.86
Train	131	3.91	0.24	0.96	0.93
Test	57	3.65	0.28	0.68	0.66