FOREST MENSURATION EXAM 2
QUESTIONS & ANSWERS(RATED A+)
What is the purpose of timber inventory? - ANSWERTo determine the volume of
standing trees in a given area. This requires a reliable estimate of the forest area
and measurement of all or an unbiased sample of trees within this area.
What is the primary objective of the FIA? - ANSWERTo provide the resource data
needed for national assessments of this nation's forest and range resources.
How many FIA plots are there in the California? - ANSWER16,837
In accordance with the tree volume equations to be used, standing trees may be
tallied by? - ANSWER- A count by species
-species and DBH
-various combinations of species, DBH, height, form crown length, quality class
What is a critical element of an inventory project? - ANSWERcheck cruising
The choice of a particular inventory system is governed by what factors? -
ANSWERcost
size of the ownership
location
availability of crews
length of time available for the project
What are some principal information needed for land acquisition with respect to
timber inventory? - ANSWER-net volume and value of merchantable trees growing in
operable areas.
-notations on timber quality, by species
-soil or site quality
-presence of nonmerchantable growing stock
-proximity to mills or primary markets
What information is needed for management plan cruises? - ANSWER-timber
growth, yield, and allowable cut,
What inventory systems are used in California? - ANSWER-FVS
-FPS
-FORSEE
What are the four timber survey classes? - ANSWER1) land acquisition inventory
2) inventories for logging or timber sales
3) management plan inventories or continuous forest inventory systems
4) special surveys designed for evaluating conditions such as stand improvement
needs, plantable areas, insect and disease infestations, or timber trespass.
, The ability to make proper allowance for defective trees encountered on timber
inventories requires experience that can be gained only by? - ANSWER-getting
repeated practice in estimating stand tree defects
-going to the log deck and watching a burea scaler scale logs, and ask him questions
How should best should you deal with tree-defect estimation? - ANSWERrecord the
actual dimension of the tree and then tally visible defect by log position.
When is a complete tree tally considered? - ANSWERonly considered for high-value
trees or when a 100 percent tree tally is feasible.
What are things to consider when conducting a timber inventory? - ANSWER-sample
size
- plot size and shape (fixed area or variable plots)
- sampling design (simple random, systematic, or stratified)
What is a stand table? - ANSWERa tabulation of the total number of stems (or
average number of stems per acre) in a stand or compartment, by dbh classes and
species.
stand table = tree density by diameter class = frequency distribution of diameters =
diameter distribution
What is a stock table? - ANSWERa stock table lists the total volume of stems (or
average volume per acre or ha) in a stand, by dbh classes and species.
stock table = volume by diameter class
Where are stock tables derived from? - ANSWERstock tables are derived from stand
tables
What is a DIB log table? - ANSWERA DIB log table summarizes the total volume by
species and small-end diameter of logs
What are the fixed-area sampling units called? - ANSWERstrips or plots
What is the expansion factor? - ANSWERThe expansion factor is used to convert
sample volume to total tract volume, where EF= 100/cruise percent
What are some advantages of strip cruising? - ANSWER- sampling is continuous
and less time is spent traveling between plots
- strips have fewer borderline trees because total perimeter of the sample is smaller
compared to a plot cruise
- two person crews are "saferWhat is the method by which strip and plot inventories
select sample trees? - ANSWERprobability proportional to frequency
What are the characteristics to be assessed within a sample area for individual tree
tallies? - ANSWER-species
- DBH
- height
- form class
QUESTIONS & ANSWERS(RATED A+)
What is the purpose of timber inventory? - ANSWERTo determine the volume of
standing trees in a given area. This requires a reliable estimate of the forest area
and measurement of all or an unbiased sample of trees within this area.
What is the primary objective of the FIA? - ANSWERTo provide the resource data
needed for national assessments of this nation's forest and range resources.
How many FIA plots are there in the California? - ANSWER16,837
In accordance with the tree volume equations to be used, standing trees may be
tallied by? - ANSWER- A count by species
-species and DBH
-various combinations of species, DBH, height, form crown length, quality class
What is a critical element of an inventory project? - ANSWERcheck cruising
The choice of a particular inventory system is governed by what factors? -
ANSWERcost
size of the ownership
location
availability of crews
length of time available for the project
What are some principal information needed for land acquisition with respect to
timber inventory? - ANSWER-net volume and value of merchantable trees growing in
operable areas.
-notations on timber quality, by species
-soil or site quality
-presence of nonmerchantable growing stock
-proximity to mills or primary markets
What information is needed for management plan cruises? - ANSWER-timber
growth, yield, and allowable cut,
What inventory systems are used in California? - ANSWER-FVS
-FPS
-FORSEE
What are the four timber survey classes? - ANSWER1) land acquisition inventory
2) inventories for logging or timber sales
3) management plan inventories or continuous forest inventory systems
4) special surveys designed for evaluating conditions such as stand improvement
needs, plantable areas, insect and disease infestations, or timber trespass.
, The ability to make proper allowance for defective trees encountered on timber
inventories requires experience that can be gained only by? - ANSWER-getting
repeated practice in estimating stand tree defects
-going to the log deck and watching a burea scaler scale logs, and ask him questions
How should best should you deal with tree-defect estimation? - ANSWERrecord the
actual dimension of the tree and then tally visible defect by log position.
When is a complete tree tally considered? - ANSWERonly considered for high-value
trees or when a 100 percent tree tally is feasible.
What are things to consider when conducting a timber inventory? - ANSWER-sample
size
- plot size and shape (fixed area or variable plots)
- sampling design (simple random, systematic, or stratified)
What is a stand table? - ANSWERa tabulation of the total number of stems (or
average number of stems per acre) in a stand or compartment, by dbh classes and
species.
stand table = tree density by diameter class = frequency distribution of diameters =
diameter distribution
What is a stock table? - ANSWERa stock table lists the total volume of stems (or
average volume per acre or ha) in a stand, by dbh classes and species.
stock table = volume by diameter class
Where are stock tables derived from? - ANSWERstock tables are derived from stand
tables
What is a DIB log table? - ANSWERA DIB log table summarizes the total volume by
species and small-end diameter of logs
What are the fixed-area sampling units called? - ANSWERstrips or plots
What is the expansion factor? - ANSWERThe expansion factor is used to convert
sample volume to total tract volume, where EF= 100/cruise percent
What are some advantages of strip cruising? - ANSWER- sampling is continuous
and less time is spent traveling between plots
- strips have fewer borderline trees because total perimeter of the sample is smaller
compared to a plot cruise
- two person crews are "saferWhat is the method by which strip and plot inventories
select sample trees? - ANSWERprobability proportional to frequency
What are the characteristics to be assessed within a sample area for individual tree
tallies? - ANSWER-species
- DBH
- height
- form class
