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Table 1 Calibration and test results of estimating leaf physiological and chemical properties of maize plants from VIS–NIR–SWIR hyperspectral reflectance spectra using Partial Least Squares Regression

From: High-throughput analysis of leaf physiological and chemical traits with VIS–NIR–SWIR spectroscopy: a case study with a maize diversity panel

Leaf properties Calibration Test
R2 RMSEC nLV R2 RMSET MAPET (%) RPD
Chlorophyll (µmol/m2) 0.948 27.4 15 0.942 29.8 5.86 4.12
Leaf water content (%) 0.757 1.44 14 0.701 1.59 1.52 1.83
Specific leaf area (m2/kg) 0.578 1.55 12 0.554 1.61 6.80 1.50
Nitrogen (%) 0.869 0.252 18 0.855 0.282 8.82 2.63
Phosphorus (%) 0.453 0.084 18 0.435 0.084 16.8 1.33
Potassium (%) 0.705 0.272 25 0.586 0.301 9.76 1.54