Models | α | β | γ | RMSEa | R2 | NMBb |
---|---|---|---|---|---|---|
Calibration | Â | Â | Â | Â | Â | Â |
Model 1 LNC = αSPAD + βDAT + γ | 1.02 ± 0.07 | -0.31 ± 0.01 | 7.01 ± 2.95 | 3.07 g kg-1 | 0.78 |  |
Model 2 LNC = αb* + βDAT + γ | -0.67 ± 0.06 | -0.29 ± 0.01 | 69.27 ± 2.10 | 3.36 g kg-1 | 0.71 |  |
Model 3 SPAD = αb* + βDAT + γ | -0.60 ± 0.04 | 0.024 ± 0.007 | 59.66 ± 1.14 | 1.62 | 0.55 |  |
Model 4 SPAD = αb* + γ | -0.60 ± 0.04 |  | 60.70 ± 1.12 | 1.62 | 0.53 |  |
Validation | Â | Â | Â | Â | Â | Â |
Model 1 |  |  |  | 2.43 g kg-1 | 0.75 | 1.19% |
Model 2 |  |  |  | 2.59 g kg-1 | 0.62 | -1.32% |
Model 3 | Â | Â | Â | 2.01 | 0.46 | -1.94% |
Model 4 | Â | Â | Â | 1.89 | 0.47 | -2.00% |