The basic density of the wood varied widely among the trees in the forests.
The basic density of the wood varied widely among the trees in the forest stands, and was comparable with second-growth coast redwood trees in California.
Figure 4 Box-and-whisker plots of the basic density of the wood at 0 m height for Kinleith and Mangatu Forests, and breast height for Rotoehu Forest.
The basic density of the wood of coast redwood trees in the North Island forests was comparable with second-growth coast redwood trees in California, USA.
The impacts of the visual characteristics, SRFs, and basic density of the boards within each group on modulus of elasticity (MOE) and modulus of rupture (MOR) were determined using four-point bending test.
The basic density of the wood of the coast redwood trees at Kinleith and Mangatu Forests was similar for growth rings 21 30 from the pith, at 0 m and 6 m height, but was lower at Rotoehu Forest due to the younger age of the trees (Table 5, Figure 4).
The stocking rates and basal area of the Kinleith and Mangatu Forest stands was indicative of closely grown trees, and could explain the similar wood basic density of these stands, when compared at the same growth rings.
The aim of this study was to examine the impacts of visual characteristics, strength-reducing features (SRFs), and basic density on the mechanical properties of fibre-managed plantation Eucalypt timber to create effective structural grade groups.
where D BH is the basic density of a given annual ring (Ring) at breast-height, Rwidth is the width of the annual ring (mm), a, b, c, d, and f are model parameters estimated from the data, and L is a normally distributed site-level random term with mean zero.
where D BH is the basic density of a five-ring group at breast-height, Ring is the midpoint ring number from the pith for this five-ring group, and a, b, c, d, and f are model parameters estimated from the data.
The basic density of Japanese cedar in Taiwan had been reported to vary from 0.302 to 0.442 Mg m-3 (Ma et al., 1992; Lin, 2006; Forest Bureau, 2010), while this higher mean basic density in the recent survey is probably due to the use of tree samples with old ages (Kennedy, 1995).
