Sampling and Measuring Timber in the Private Woodland
Estimating Total Woodlot Volume
After estimating individual tree volumes, you can calculate the total volume of your woodlot. Use the following formula to estimate total tract volume from 1/20th-acre sample plots:
| Where: |
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V |
|
= |
|
Estimated tract volume |
| |
|
v |
|
= |
|
Sum of individual tree volumes |
| |
|
A |
|
= |
|
Total number of acres in the tract |
| |
|
n |
|
= |
|
Number of sample plots. |
As an example, in a 37-acre tract in which you sampled 32 plots, you would multiply the sum of the individual tree volumes by 23.125 [ = 20 X (37/32)] to estimate the total tract volume. If the sum of tree volumes from the 32 sample plots was 35 cords, the estimate of the total tract volume would be 809 cords (35 X 23.125).
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Minnesota Extension.
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