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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

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Plant Methods

ISSN: 1746-4811