Uneven Age Flashcards
1
Q
What is Q?
A
known as diminutive quotient or licourts constant, Q indicates how many SPH should be in each DBH class in order to produce the desired SPH in the target DBH class.
2
Q
Is Q constant?
A
Q is only constant if the stand is perfectly managed to make it so. Q varies naturally from class to class in unmanaged forests.
3
Q
What are the 3 steps of uneven aged management?
A
- Inventory existing stand
- Produce Q
- Establish target diameter and SPH as a function of market, growth rate and site productivity.
4
Q
What are the limitations of uneven aged systems?
A
- Cant establish high yield intolerant species
- more costly to manage
- not ideal for addressing forest health issues.
- complex to administer and control
- difficult to control harvest related damage
- difficult to harvest steep terrain.
5
Q
What are the benefits of an uneven aged system?
A
- maximum site protection
- provides mosaic of habitat structure
- low visual disturbance
- regular returns
- more resilient and resistant to timber destroying events.
6
Q
Factors that influence Q
A
Site productivity Seed production species tolerance mortality growth capacity
7
Q
What information would you provide to the fallers?
A
- objectives of the system being used
- preferred leave tree spp.
- tree quality / pest damage criteria
- max void size (1 tree)
- wind firm characteristics of leave trees
- limb/buck in bush to avoid resid. damage
- fall trees toward natural openings
- boundary and Wildlife Tree markings
8
Q
What info to provide the yarders
A
- minimize residual damage by using smallest equipment possible, staying on skid trails and limiting turn size.
- use stumps and harvest trees as rub trees
- minimize soil disturbance
- Avoid destruction of habitat
