Fig. 5From: An efficient method to reduce grain angle influence on NIR spectra for predicting extractives content from heartwood stem cores of Toona. sinensisThe variance of predicted EC between two grain angles on T. sinensis cores samples using full spectra (a) and sMC variables selected spectra (b); p-values significant level: ***: 0.001, **: 0.01, *:0.05Back to article page