Fig. 3From: High-throughput analysis of leaf physiological and chemical traits with VIS–NIR–SWIR spectroscopy: a case study with a maize diversity panela The mean VIS–NIR–SWIR leaf spectra of the maize plants from Field− N (solid orange), Field + N (solid blue), and greenhouse (solid black). The bounding envelopes are the maximum and minimum spectra showing the spectral variability within each group. b Principal component score plots (PC1 vs. PC2) of each group and their convex hullsBack to article page