Silvicultural system: Aggregated Retention
Treatment unit size: 25.5ha
Opening sizes: 4.4ha, 6.4ha, and 11.5ha
Deferred areas: 3.2ha adjacent area temporarily deferred
Retention structures objective: 2.6ha of internal reserves and 5.5ha riparian reserves
Age structure: Two-aged
The aggregated retention system retains individual trees and groups of trees within the cutblock for the purpose of maintaining or protecting environmental values and structural diversity during at least one rotation. More than half the total area of the cutblock is within one tree-height from the base of a tree or the cutblock boundary. This study will examine windthrow and the spread of root disease from residual to regenerating trees, which are potential problems with this treatment.