Calibration set Calibration set Validation set Validation set Validation set
2 RMSEC v2 RMSEP RPD
PH 0.95 0.05 0.92 0.06 3.56
SOM 0.98 0.31 0.97 0.47 5.68
AN 0.998 0.67 0.997 0.85 20.74
AP 0.989 0.96 0.998 0.31 24.64
AK 0.983 3.80 0.987 1.79 8.73
Fe 0.96 0.54 0.988 0.29 9.05
Cr 0.99 1.03 0.992 1.05 11.20
Cd 0.96 0.012 0.89 0.02 2.98
Zn 0.988 0.52 0.991 0.82 10.36
Cu 0.992 0.68 0.989 0.52 9.23
Pb 0.987 0.77 0.989 0.70 9.38