The fundamental principal of forest succession is that the forest changes
over time. There is no steady state until well into the climax or final stage
of forest development. That being said, natural resource managers and forest
landowners have tools such as timber harvesting available to
assist with the
process.
Even-aged management favors the shade intolerant species of eastern temperate hardwoods like the oaks, cherry, walnut, and yellow poplar. Creating an even-aged forest utilizes harvesting techniques such as a shelterwood harvest or clearcutting. Hardwood management is all about developing adequate natural regeneration. This is the main consideration when deciding on harvesting timber.
If adequate, desirable, advanced ( tree saplings 5-6 feet tall ) regeneration
is present; a clearcut or group selection would remove the overstory allowing
full sunlight to reach the forest floor. This method provides the greatest
economic return and allows for efficient, cost effective harvesting.
A shelterwood harvest would be in order should advanced regeneration not be
available. This practice will allow for some shade to be left in the overstory
by favoring 20-30 desirable, dominant parent trees per acre. The alternating
full sunlight and shade on the forest floor will generally allow adequate
regeneration to develop. The parent trees may be removed when the regeneration
becomes advanced within 8-12 years.
Uneven-aged management favors tree species that are shade tolerant such as
the maples, American beech, and the birches. It provides for a continuous
forest canopy at all times. The practice provides a periodic income so long
as the residual species have economic value and the practice utilizes wood
that might be lost to mortality. This method will turn an oak-hickory forest
into a climax forest over several, periodic harvests however.
Thinning is a timber harvesting practice removing the poorest competitors
within a stand allowing the best trees room to grow and develop. Thinning
should occur mid rotation in for hardwoods or 40 – 60 years of age.
Hardwoods are evaluated on the basis of quality and desirability for wood products. Soils are extremely important for a forest landowner to consider when attempting to culture quality hardwoods. Deep, loamy, fertile soils favor good hardwood tree growth. Pine species do well in clay based soils. This is often the reasoning behind hardwood conversion to pine plantations.