Aboveground Biomass Models for Indigenous Tree Species in the Dry Afromontane Forest, Central Ethiopia

Table 2

The general equations used in the AGB model development for E. capensis, N. congesta, and R. ruspolii. Where ht: total tree height, dbh: diameter at breast height and dsh: diameter at stump height.

Model code	Model form
1	ln (AGB) = α + β1 ln (DBH) + ε
2	ln (AGB) = α + β3 ln (H) + ε
3	ln (AGB) = α + β2ln (DSH) + ε
4	ln (AGB) = α + β2 ln (DSH) + β4 ln (WD) + ε
5	ln (AGB) = α + β1 ln (DBH) + β3 ln (H) + ε
6	ln (AGB) = α + β1 ln (DBH) + β4 ln (WD) + ε
7	ln (AGB) = α+ β3 ln (H) + β4ln (WD) + ε
8	ln (AGB) = α + β1 ln (DBH) + β3ln (H) + β4 ln (WD) + ε

Where, β1, β2, and β3 are estimated parameters of the fitted models respectively, whereas α is an intercept, ε the residual and WD is wood density (g cm-3) for a given tree, DBH is the diameter at breast height, DSH represent diameter at stump and H is tree height.