Forest Mensuration Flashcards
What are the 3 types of sampling?
Systematic Sampling
Representative (selective) sampling
Random sampling
How many point samples are needed given the size of the stand?
<5 ha
5 to 20 ha
20 to 40 ha
40 to 80 ha
5 to 10 points
2 to 1 points per ha
1 to 0.5 points per ha
0.5 to 0.25 points per ha
What are the two general sampling designs commonly used in forestry?
- Fixed Area Sample Plots
- Point sample plots
what are common planting densities?
1500-2500 Stems/ha
the ______ ______ ______ is the sum of cross sectional surface area of each live tree, measured at DBH and reported on a per unit area basis.
Stand basal area
The act of _________ is the measuring of the volume of mass or harvested primary wood products.
Scaling
one GMT of spruce / fir = ________ m3
1.167m3
what is a full or stand cord in ft? How many solid m3 is that?
8ft X 4ft X 4ft =129 ft3
2.5 m3 chopped
the most common manufactured unit of timber volume is _________. used widely to express the volume of trees, logs and lumber.
Board Foot
what is the measurement of 1 Food board measurement?
12 in X 12 in X 1 in =144 cu in.
A table or formula that gives the estimated FBM of the logs of specified diameter and length would be example of what?
A “Log Rule”
what are a few examples of log rule tables? There’s 3
- Doyle log rules: the most used and oldest.
- International log rule: the most accurate
- The New Brunswick log rule: the most common log rule used in the maritimes.
when log scaling and determining the net scale of lumber. what are you looking for?
Deductions including defects that will reduce the volume of lumber.
Such as defects and voids
1 GMT = ??? FBM
207 FBM
1 MFBM = ?.? GMT
4.8 GMT
What is the formula for calculating defects and voids for net scale while scaling?
Volume if defects = Area of defects(m2) * length of bold * Form factor
