Forest Measurements Final Exam-
Graded A
How is Basal Area determined? - correct answer-(dbh)squared * 0.005454
How do you convert chains to acres? - correct answer-(L * W) = (ch)squared
(ch)squared / 10 = ac
How do you convert chains to miles? - correct answer-1 ch = 66 ft & 5,280 ft in a mile
(# chains * 66) / 5,280 ft
How are board feet determined? - correct answer-(L * W * D)
How is slope determined? - correct answer-rise/run
How do you convert feet to acres? - correct answer-1 ac = 43,560 ft.squared
How do you convert a reference fraction to an equivalent scale? - correct answer-divide
by 12
1:12000 = 1":1000'
What are some key forest stand characteristics that may be of interest to natural
resource managers and how are they measured? - correct answer-1. Land use history -
aerial and historical photo interpretation
2. Area of plot - dot grid
3. Stand Age - tree coring
4. Age class distribution - stand table development
5. Average dbh - dendrometer
6. Tree height - clinometer
How do you find the quadratic mean diameter? - correct answer-First, find the average
BA. Then find the square root of the avg. BA divided by 0.005454
How is total tree height measured? Merchantable? (process & formula) - correct
answer-Total tree height is taken from 1 chain (66') away. 2 values are determined
using a clinometer: top and bottom. Total height is the base of the tree to the very top of
the crown. Merchantable height stops at the first major bifurcation.
Height = 66' x (top % +/- bottom %) / 100
- if the signs are opposite, add
- if the signs are the same, subtract
Graded A
How is Basal Area determined? - correct answer-(dbh)squared * 0.005454
How do you convert chains to acres? - correct answer-(L * W) = (ch)squared
(ch)squared / 10 = ac
How do you convert chains to miles? - correct answer-1 ch = 66 ft & 5,280 ft in a mile
(# chains * 66) / 5,280 ft
How are board feet determined? - correct answer-(L * W * D)
How is slope determined? - correct answer-rise/run
How do you convert feet to acres? - correct answer-1 ac = 43,560 ft.squared
How do you convert a reference fraction to an equivalent scale? - correct answer-divide
by 12
1:12000 = 1":1000'
What are some key forest stand characteristics that may be of interest to natural
resource managers and how are they measured? - correct answer-1. Land use history -
aerial and historical photo interpretation
2. Area of plot - dot grid
3. Stand Age - tree coring
4. Age class distribution - stand table development
5. Average dbh - dendrometer
6. Tree height - clinometer
How do you find the quadratic mean diameter? - correct answer-First, find the average
BA. Then find the square root of the avg. BA divided by 0.005454
How is total tree height measured? Merchantable? (process & formula) - correct
answer-Total tree height is taken from 1 chain (66') away. 2 values are determined
using a clinometer: top and bottom. Total height is the base of the tree to the very top of
the crown. Merchantable height stops at the first major bifurcation.
Height = 66' x (top % +/- bottom %) / 100
- if the signs are opposite, add
- if the signs are the same, subtract
