What is the Bitterlich method?
Bitterlich’s method is based on the relationship between the basal area of a tree and the basal area per acre that this tree represents. Here we provide an example to help you see the mathematical relationship between the tree radius, the variable plot radius (limiting distance) and the BAF.
How do you calculate basal area factor of thumb?
Multiply the number of in trees by the BAF of your thumb to give the stand basal area. Compare this result with other students measuring from the same point and with measurements made at other points in the same stand of trees.
What is basal area in forestry?
Basal area is the common term used to describe the average amount of an area (usually an acre) occupied by tree stems. It is defined as the total cross-sectional area of all stems in a stand measured at breast height, and expressed as per unit of land area (typically square feet per acre).
How do you use Relaskop?
The relaskop adjusts for slope when measuring diameters at any height above the ground. When measuring a diameter, take two measurements at right angles (90 degrees) to each other. Use the relaskop for abnormal diameters by shooting above or below DBH and adjusting for taper.
How do you use Relascope?
The Relascope is used by looking through the hole in the front of the instrument. When users look through this hole they will see several scales that are used for different measurements on the bottom half of their view, and on the top half they will see the tree that they are looking at.
How do you use a Cruz all?
To use, hold the button at the end of the chain in your teeth and extend the Cruz-All away from your eye until chain is taut. Looking through the Cruz-All, “count” all trees appearing wider at breast height than the opening for the basal area factor you’re using.
What does BA mean in forestry?
Basal Area as Used in Forestry BA is a measure of the capacity of certain stands of trees to increase annual ring growth.
Why do we measure basal area?
basal area is used to determine more than just forest stand density; it is also linked with timber stand volume and growth. therefore, it is often the basis for making important forest management decisions such as estimating forest regeneration needs and wildlife habitat requirements.
How do you use Haga altimeter?
Using a Haga to determine tree height:
- Select a distance, preferably 15, 20, 25, or 30 meters away from the tree, where the required point on the tree (e.g. tree tip) can be seen.
- Select the appropriate distance scale on the rotating rod.
- Release the pointer by pressing the button on the side of the instrument.