B.F. Bachelor of Forestry Bachelor of Forestry Forest Production Management 2 — Questions and Answers
Question 1: Which silvicultural system is most appropriate for shade-tolerant species like sugar maple that require partial canopy cover for regeneration?
- Clearcutting
- Shelterwood system (Correct answer)
- Seed-tree method
- Coppice system
Correct answer: Shelterwood system
The shelterwood system retains overstory trees to provide shade and seed sources, favoring regeneration of shade-tolerant species.
Question 2: In US timber production, the term 'rotation age' refers to:
- The age at which trees are first commercially thinned
- The number of years between prescribed burns
- The planned age at which a stand is harvested and regeneration begins (Correct answer)
- The time required for a logging crew to rotate among harvest units
Correct answer: The planned age at which a stand is harvested and regeneration begins
Rotation age is the planned number of years from stand establishment to final harvest, determining the production cycle length.
Question 3: What is the primary purpose of a timber cruise in forest production management?
- To transport logs from the harvest area to the mill
- To estimate the volume and value of timber in a stand before harvesting (Correct answer)
- To inspect roads for safe skidder access
- To monitor wildlife habitat after a harvest
Correct answer: To estimate the volume and value of timber in a stand before harvesting
A timber cruise is a field inventory method used to estimate the volume, species composition, and quality of timber in a stand prior to sale or harvest.
Question 4: Which log grading standard is most commonly used for hardwood sawlogs in the United States?
- Doyle Log Rule
- National Hardwood Lumber Association (NHLA) grading rules (Correct answer)
- Scribner Log Rule
- International 1/4-inch Log Rule
Correct answer: National Hardwood Lumber Association (NHLA) grading rules
The NHLA grading rules are the standard system for grading hardwood lumber in the US, based on the proportion of clear cuttings obtainable from a board.
Question 5: A stand basal area of 150 sq ft/acre is measured in a mature pine plantation. The forester prescribes a commercial thinning to reduce basal area to 80 sq ft/acre. This type of thinning is classified as a:
- Sanitation cut
- Improvement cut
- Density management thinning (Correct answer)
- Salvage harvest
Correct answer: Density management thinning
Density management thinning is conducted to reduce stand density and improve growth rates of remaining trees by reducing competition.
Question 6: Which of the following best describes the concept of 'even-aged management'?
- Managing a forest so trees of all ages are present across the landscape
- Managing stands so that all trees are within a similar age class, harvested together (Correct answer)
- Selecting individual trees for harvest based on size regardless of age
- Maintaining a continuous canopy with no large openings
Correct answer: Managing stands so that all trees are within a similar age class, harvested together
Even-aged management creates stands where all trees originate at approximately the same time and are managed as a cohort until final harvest.
Question 7: In forest production, 'mean annual increment (MAI)' is important because it identifies:
- The total volume harvested per acre per year
- The age at which a stand reaches its maximum average annual growth, indicating optimal rotation length (Correct answer)
- The average log volume per truckload delivered to a mill
- The annual increase in timber stumpage price
Correct answer: The age at which a stand reaches its maximum average annual growth, indicating optimal rotation length
MAI peaks at a specific stand age, and harvesting near that peak maximizes biological production efficiency over the rotation.
B.F. Bachelor of Forestry Bachelor of Forestry Forest Production Management 2
Which silvicultural system is most appropriate for shade-tolerant species like sugar maple that require partial canopy cover for regeneration?