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Results of original spectrum (Log(1/R)) with different wavelength ranges by PLS method
| Wavelength range (nm) | No. of factors | r2 | RMSEC | RMSEP |
| 967–2619 | 4 | 0.752 | 0.0681 | 0.0679 |
| 967–1375 | 8 | 0.729 | 0.0522 | 0.0760 |
| 1375–2619 | 5 | 0.780 | 0.0642 | 0.0690 |
r 2: Correlation coefficient of determination
