Forestry Exam 3 (Forest Mensuration,
Silviculture)
Forest Mensuration - correct answer-the science of measuring the contents of standing
or felled timber and estimating growth and yield
What are the seven most common tree measurements? - correct answer-1. diameter
2. tree height
3. tree age
4. bark
5. crowns (diameter volume)
6. log volume
7. tree growth
How do we commonly measure tree diameter? - correct answer-Diameter at breast
height (DBH)
- standard method of expressing diameter of standing tree
- one of the most common dendrometry measurements
- measured 4.5 feet (1.37m) above ground on the uphill side of the tree
What are the three ways to measure DBH? - correct answer-- diameter tape
- Biltmore stick
- tree calipers
How do you measure split trees? - correct answer-if the split is above DBH- measure as
one tree
if the split is below DBH- measure as two trees
What two ways can total tree height be measured? - correct answer-- clinometer
- laser hypsometer
What can be used to estimate tree height and what else does it measure? - correct
answer-Merritt Hypsometer side of the Biltmore Stick
- measure 16 foot logs
How can you measure tree age (2)? - correct answer--annual rings provide best method
of determining tree age
- measured by increment borers
How we measure bark thickness? - correct answer-Swedish bark gauges are used to
measure the thickness of the bark of living trees
, What are the different tree crown dimensions variables that can be measured? - correct
answer-crown..
- diameter
- area
- depth or length
- width
- ratio of crown diameter to bole diameter
- surface area
- volume
What can be used to measure canopy closure? - correct answer-spherical
densiometer= estimate percent canopy closure
What are the four sampling designs? - correct answer-1. simple random sample
2. systematic sample
3. stratified random sample
4. cluster sample
What are some other sampling methods? - correct answer-plots along transects, line
transect, and points along road
Forest Inventory analysis - correct answer-the systematic collection of data and forest
information for assessment or analysis
What are the two primary ways of forest inventory analysis? - correct answer-1. fixed
area sampling
2. point sampling
Fixed area plot sampling - correct answer-(aka fixed radius plot sampling)
- most commonly circular
- standard size is 0.10 acre (radius of 37.24ft)
- all trees inside radius are measured
- border line trees are based on midpoint of tree
Point sampling - correct answer-trees are selected based on size rather than frequency
of occurrence
What tool does point sampling use? - correct answer-prisms- used to determine what
trees are sampled
What is the constant letter for the given sighting angle from a prism? - correct answer-k
Basal area factor - correct answer-corrections used w/ prism or angle gauges
Silviculture)
Forest Mensuration - correct answer-the science of measuring the contents of standing
or felled timber and estimating growth and yield
What are the seven most common tree measurements? - correct answer-1. diameter
2. tree height
3. tree age
4. bark
5. crowns (diameter volume)
6. log volume
7. tree growth
How do we commonly measure tree diameter? - correct answer-Diameter at breast
height (DBH)
- standard method of expressing diameter of standing tree
- one of the most common dendrometry measurements
- measured 4.5 feet (1.37m) above ground on the uphill side of the tree
What are the three ways to measure DBH? - correct answer-- diameter tape
- Biltmore stick
- tree calipers
How do you measure split trees? - correct answer-if the split is above DBH- measure as
one tree
if the split is below DBH- measure as two trees
What two ways can total tree height be measured? - correct answer-- clinometer
- laser hypsometer
What can be used to estimate tree height and what else does it measure? - correct
answer-Merritt Hypsometer side of the Biltmore Stick
- measure 16 foot logs
How can you measure tree age (2)? - correct answer--annual rings provide best method
of determining tree age
- measured by increment borers
How we measure bark thickness? - correct answer-Swedish bark gauges are used to
measure the thickness of the bark of living trees
, What are the different tree crown dimensions variables that can be measured? - correct
answer-crown..
- diameter
- area
- depth or length
- width
- ratio of crown diameter to bole diameter
- surface area
- volume
What can be used to measure canopy closure? - correct answer-spherical
densiometer= estimate percent canopy closure
What are the four sampling designs? - correct answer-1. simple random sample
2. systematic sample
3. stratified random sample
4. cluster sample
What are some other sampling methods? - correct answer-plots along transects, line
transect, and points along road
Forest Inventory analysis - correct answer-the systematic collection of data and forest
information for assessment or analysis
What are the two primary ways of forest inventory analysis? - correct answer-1. fixed
area sampling
2. point sampling
Fixed area plot sampling - correct answer-(aka fixed radius plot sampling)
- most commonly circular
- standard size is 0.10 acre (radius of 37.24ft)
- all trees inside radius are measured
- border line trees are based on midpoint of tree
Point sampling - correct answer-trees are selected based on size rather than frequency
of occurrence
What tool does point sampling use? - correct answer-prisms- used to determine what
trees are sampled
What is the constant letter for the given sighting angle from a prism? - correct answer-k
Basal area factor - correct answer-corrections used w/ prism or angle gauges
