Fig. 6From: Modelling the variation in wood density of New Zealand-grown Douglas-firLongitudinal pattern of disc density within stem by relative height. Fine lines show densities for individual trees. The solid line shows the density predicted by Model (4) for an average site (L = 0). The dashed lines for sites at the 5th and 95th percentiles (lower and upper lines, L = −64 and L = +64, respectively)Back to article page