Prospect Hill Forest
Hill Forest Monitoring
Tree growth data (Excel
Species and dbh (diameter at breast height - 1.37 m) from the 3
forest inventory plots on Prospect Hill.
Estimating the whole tree biomass (weight; including branches, leaves,
bark) based on parameters that are easily measured in the field
(dbh) is becoming a fundamental task in forestry. Regression equation
are used to estimate tree biomass. These equation are typically
developed in the following way: samples of major tree species are
chosen for study, selected dimensions of each tree are recorded,
the tree is felled and weighted either a whole or in pieces, and
subsamples are oven-dried and weighted again to determine tree moisture
content. Then tree wet (green) weights are converted to dry weights
by using moisture content values. Because biomass is related to
tree dimension, regression analysis is used to estimate the actual
tree biomass from dbh measurements.
Example: wt=1.3499 dbh*2.45
wt = weight (kg), dbh (in) for Hemlock (Tsuga canadensis).