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Table 2 Calibration and test results of estimating leaf physiological and chemical properties of maize plants from VIS–NIR–SWIR hyperspectral reflectance spectra using support vector regression

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

  Calibration Test
R2 RMSEC C R2 RMSET MAPET (%) RPD
Chlorophyll (µmol/m2) 0.950 27.0 1 0.946 28.5 5.59 4.30
Leaf water content (%) 0.765 1.42 1 0.703 1.81 1.58 1.83
Specific leaf area (m2/kg) 0.600 1.52 1 0.562 1.61 6.71 1.50
Nitrogen (%) 0.882 0.240 10 0.861 0.277 8.69 2.67
Phosphorus (%) 0.545 0.077 100 0.481 0.081 16.4 1.38
Potassium (%) 0.740 0.256 100 0.543 0.317 10.2 1.46