Tree species: coniferous trees (spruce (Picea abies), fir (Abies alba)) and solid deciduous trees (beech (Fagus sylvatica)).
Grain size: 2–5 cmBiomass
Chips from coniferous trees (spruce, fir) with grain size between 2 and 5cm do not contain bark, pure sawdust does not contain bark either. Chips from beech wood with the same grain size (2–5cm) contain bark, because beech logs are typically not glued.
