Table 4: Number of latent PLSR variables, coefficient of determination ( ), adjusted , and relative root mean square error (%RMSE) for the selected PLSR models of chemical constituents of the Podzol.

AlFeMn C N

77754
0.810.820.550.490.36
adj. 0.760.770.440.400.27
%RMSE34.332.128.858.975.3

55544
SNV-DT 0.790.830.550.510.36
adj. 0.760.810.470.450.28
%RMSE36.030.928.656.671.2

55411
Diff 0.780.790.510.410.31
adj. 0.740.750.450.400.28
%RMSE36.934.829.661.371.0

43431
2nd Diff 0.760.780.560.530.23
adj. 0.730.760.510.490.20
%RMSE38.835.328.055.375.2

36511
CR 0.840.780.490.560.28
adj. 0.820.730.400.540.26
%RMSE31.436.131.053.272.3

66773
NCR 0.780.770.610.710.28
adj. 0.730.720.510.640.21
%RMSE37.636.926.942.974.7

65665
MSC 0.810.820.530.520.43
adj. 0.770.790.440.420.33
%RMSE34.731.729.357.168.4

54854
EMSC 0.800.770.570.490.41
adj. 0.760.730.440.410.33
%RMSE35.436.828.158.166.2