Figure 1
From: Fine root lignin content is well predictable with near-infrared spectroscopy
Schematic depiction of the workflow of chemical analysis (left box with steps 1–4 indicated in square brackets), spectral analysis (outlined in black boxes and step 5) and statistical analysis. The latter is subdivided in spectral pre-processing (block 1 with steps 6–9) and final analysis (block 2 with steps 10–12). See text for further details.
