Improving aboveground biomass estimates by taking into account density variations between tree components

Table 4 Pearson’s correlation coefficient r between BD and DBH for each tree component and each species where stem w/o knots means stem under bark without knots, Br ins means branch insertions and Br w/o ins means branches without insertions

Tree species	Stem w/o knots	Bark	Knots	Br ins	Br w/o ins
Abies alba	0.21	0.90	0.45	0.86	0.87
	NS	**	NS	**	**
Picea abies	− 0.48	0.18	− 0.05	0.53	0.47
	NS	NS	NS	NS	NS
Pseudotsuga menziesii	− 0.04	0.64	0.20	0.55	-0.22
	NS	NS	NS	NS	NS

The stars indicate the r significance: NS, p ≥ 0.05; *, p < 0.05; **, p < 0.01; ***, p < 0.001

ISSN: 1297-966X