Bachelor of Forestry Forest Mensuration Flashcards
7 cards from real B.F. Bachelor of Forestry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Forestry Forest Mensuration flashcards as text
The 'growing stock' of a forest refers to:
Answer: The total volume of live trees in a defined area
Growing stock is the standing volume of all live trees (above a minimum size) within a defined forest area at a given point in time.
When using a Bitterlich angle gauge (wedge prism) with a basal area factor (BAF) of 10, each 'in' tree represents how many square feet of basal area per acre?
Answer: 10 sq ft/acre
Each tree tallied as 'in' using a BAF 10 prism contributes 10 square feet of basal area per acre to the stand estimate.
What is the primary difference between 'net volume' and 'gross volume' of a log?
Answer: Gross volume is total wood including defects; net volume excludes defects
Gross volume includes all wood regardless of quality, while net volume subtracts defect deductions to reflect merchantable wood only.
An increment core extracted from a tree is used to determine:
Answer: The tree's age and radial growth rate
An increment core contains annual rings that reveal the tree's age and the rate of radial (diameter) growth over time.
Which of the following best describes 'stand density index' (SDI)?
Answer: A measure of stocking based on number of trees and their average diameter
SDI (Reineke's SDI) relates the number of trees per acre to the quadratic mean diameter to quantify stand density relative to maximum capacity.
The 'Doyle log rule' tends to underestimate volume for logs with a small end diameter of less than:
Answer: 16 inches
The Doyle rule significantly underestimates board-foot volume for logs smaller than about 16 inches in small-end diameter due to formula limitations.
In forest inventory, a 'two-stage sampling' design involves:
Answer: First selecting primary sampling units (PSUs), then selecting secondary units within each PSU
Two-stage sampling selects primary units (e.g., stands or large plots) first, then subsamples within those units to reduce travel costs while maintaining accuracy.