# Our Method Selection for Above ground biomass

This used Wood Density, DBH & Height of the tree as a parameter measured from the trees.

This used only DBH & Height of the tree as a parameter measured from the trees.

This used only DBH of the tree as a parameter measured from the trees.

Note:

· AGB = Above ground biomass (kg)

· DBH = Diameter at breast height (cm)

· H = Height (m)

· WD = Basic wood density (t/m^3)

* If none of the above allometric equations could be applied we use the generic method:

General Method

1. Determine the total (green) weight of the tree.

2. Determine the dry weight of the tree.

3. Determine the weight of carbon in the tree.

4. Determine the weight of carbon dioxide sequestered in the tree

***Determine the total (green) weight of the tree*

Based on tree species in the Southeast United States, the algorithm to calculate the weight of a tree is:

· W = Above-ground weight of the tree (in pounds)

· D = Diameter of the trunk (in inches)

· H = Height of the tree (in feet)

For trees with D < 11:

W = 0.25 D2H

For trees with D >= 11:

W = 0.15 D2H

*Depending on the species, the coefficient (eg. 0.25) could change, and the variables D2 and H could be raised to exponents just above or below 1.*

* *

***Determine the dry weight of the tree*

*(This is based on an extension publication from the University of Nebraska.)*

This publication has a table with average weights for one cord of wood for different temperate tree species. Taking all species in the table into account, the average tree is 72.5% dry matter and 27.5% moisture.

Therefore, to determine the dry weight of the tree, multiply the weight of the tree by 72.5%.

Last updated