B.F. Bachelor of Forestry Bachelor of Forestry Forest Mensuration 2

Question 1

Which formula is used to calculate the volume of a tree using the Smalian's method?

Accepted Answer

V = L × (Ab + At) / 2

Answer

Smalian's method calculates log volume as the average of the basal areas of both ends multiplied by the log length.

Question 2

The Prismatic compass is primarily used in forest mensuration for:

Accepted Answer

Running compass traverses and measuring bearing angles

Answer

A prismatic compass is used to measure magnetic bearings during traverse surveys in forest areas.

Question 3

What does 'form quotient' represent in tree measurement?

Accepted Answer

Ratio of diameter at mid-height to DBH

Answer

Form quotient is the ratio of the diameter at mid-height (or upper stem) to the diameter at breast height, indicating stem taper.

Question 4

A timber cruise using systematic sampling with a fixed-area plot requires the cruiser to:

Accepted Answer

Measure trees within randomly located circular or rectangular plots

Answer

Fixed-area plot cruising involves establishing sample plots at systematic intervals and measuring all trees within each plot.

Question 5

The ocular estimate of crown closure in a stand is typically expressed as:

Accepted Answer

Percentage of ground covered by tree crowns

Answer

Crown closure (or canopy cover) is expressed as the percentage of the ground area covered by vertical projection of tree crowns.

B.F. Bachelor of Forestry Practice Test