Note: Form of single input variable equation is\(ln(Y)=ln(c)+a\bullet ln(X)\), where Y is dry mass (g) of shrub
component; ln(c) is a constant with the standard error S.E.(ln(c)); a is
power exponent with the standard error S.E.(a); X is crown area (C),
basal diameter (D), height (H), or age (A); n = 143 except for A-related
equation (n = 56); R2 is determination coefficient;
p-value is the significance of regression; RE is the relative error.
TABLE 4 Biomass equations with two-input variables for shrub
components: foliage, branches, total above-ground, coarse roots, fine
root, total below-ground, and total shrub biomass.