“…This aspect is of interest to industries making products such as pulp, paper and fibreboard, as well as for the production of wood in a forest. Density is considered one of the most important indices of timber strength properties as it has been positively correlated with such properties as modulus of rupture (MOR) and modulus of elasticity (MOE) (Bendtsen, 1978), maximum crushing strength (Moulds, 1952), hardness and shrinkage (Brunden, 1964), and it also has a considerable influence on machinability, conversion, acoustic properties, and wearability (Fielding, 1967). These density variations have also been indicated for effects on permeability (McQuire, 1975).…”