Highly significant (P < 0.001) allometric equations were
obtained for all the components of the three species (Table 2).
The general biomass equations of total biomass provided better
fits than the species component specific allometric equations (D.
sissoo 0.1984 + 1.3756X, r2 = 0.9956, A. catechu 0.3014 + 1.182X,
r2 = 0.9903 and A. lebbeck −0.7516 + 1.3805X, r2 = 0.9666) (Table 2).
Very few studies throughout the world have focused on developing
allometric equations for smaller diameter classes. To establish
higher accuracy in estimating the biomass the d.b.h. of present
study was subjected to allometric equations developed earlier for
D. sissoo plantation of higher girth class (above 10 cm) by Lodhiyal
et al. (2002). The biomass estimated through earlier equations
was 26% higher in comparison to newly developed equations.
As standard equation for other two species (A. lebbeck and A.
catechu) are not available, hence no comparisons were possible.
Generally, volume equations are used for estimating above
ground bole biomass and belowground biomass that contributes
approximately one fourth in the tree biomass is neglected.
than the reported value (Table 1).