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Clocaenog Continuous Cover Forestry (CCF) Research Area
Each Block has been thinned in 2004, 2009 and 2012 aiming to achieve a residual basal area of 25 m2 ha-1. The criteria to consider for tree removal are:
The majority of this area has been thinned using the standard Forest District practice of transformation of Sitka spruce to a simple structure (one or two canopy strata). The area also contains an unthinned control, which is a 1 ha assessment plot (Labelled “CLG1” inthe map of the Clocaenog experimental areas) and a 50 m surround.
The aim in this area is to produce a more irregular stand structure and heterogeneous regeneration compared with the uniform shelterwood in Blocks 4 and 5. This is being achieved by:
This is the most innovative treatment in any of the Blocks and is aiming to produce an irregular stand structure as quickly as possible. This is being achieved by:
The aim of these two blocks is to produce a simple CCF structure by judicious thinning of the canopy to aid the growth and development of regeneration. To achieve this the priorities for tree removal are:
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