18 Questions
What is the artificial form factor for a tree with a diameter at breast height (dbh) of 45.6 cm and a height of 27 m?
0.2
In absolute form factor calculations, what is used as the reference for the base of the cylinder?
Breast height
How are the Diameter over bark (dob), diameter under bark (dub), and bark thickness (tb) related?
dob = dub + 2 × tb
For a non-circular cross-section, what does girth tape do in relation to sectional area estimation?
Over-estimates the sectional area
What is the basal area in square meters for a tree with a diameter at breast height (dbh) of 25 cm?
.149
Which term describes how close measured values are to the correct value?
Accuracy
Which of the following is an example of chemical weathering?
Thermal stresses
In forest management, what does the normal form factor reference for the base of the cylinder?
Base of the tree
What is the angle between the base and hypotenuse in a triangle if θ = 60° and the hypotenuse c = 2 cm?
0.33
A sample plot measures 15 m × 15 m with 3 trees having dbh of 25 cm, 30 cm, 35 cm. What is the stand basal area in sq m per Ha?
14.6
What is the spacing factor for eucalyptus trees that are on average 30 cm in diameter and spaced on a regular 3 m grid?
20
Which type of soil typically has the highest organic matter content?
Peaty soil
What is the term used for the process of cutting timber into logs?
Bucking
Which marking color is typically used to show trees that are to be retained?
Yellow
In forest management, what process involves the careful selection of trees for harvesting based on a forest management prescription?
Cruising
Which type of face cut provides the greatest accuracy in logging operations?
All of these
What is the term for the process of moving logs from the forest to the landing area?
Skidding
Which calculation gives the net growth in initial volume for tree measurement?
$V2-V1$
Test your knowledge on tree measurement formulas including form factors, reference points, and relationships between diameter over bark, diameter under bark, and bark thickness.
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