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Fig. 6. Best-fit regressions in the far-red spectrum of leaf total chlorophyll (a + b) concentration versus leaf reflectance (R), transmittance (T), and absorptance (A) band ratios for each species. Regressions were based on the power function y = a + bxc. Regression parameters, including the coefficient of determination (r2) and standard deviation of the estimate (s), are listed for each regression along with the wavelength (
) for the numerator (42 samples per species).
