ZBRRA

Glossary

March 30th, 2009

Approved Contractor - will have sufficient experience and knowledge to work on Council trees.  This will include knowledge of tree work methods, tree health and safety requirements.

 

 

Crown Lifting

 

Remove lower branches for better access to light or visibility.

 

Crown Reduction

 

Selective removal of peripheral branches to reduce size, for powerline clearance or to mitigate growth.

 

Crown Thinning

 

Selective branch removal to lighten heavy limbs beneficial for tree vitality and safety.

 

Formative Pruning

 

Establishment of firm and sound structure.  Best performed on trees that are young to minimise wound size.

 

Pollarding

 

The annual removal of previous growth to same point of the tree structure, resulting in a flush of slender shoots and branches.

 

Topping

 

Practice that involves the removal of strong leader branches, cut usually on a horizontal plane.  Topping may lead to the death of the branches.  It impacts on the natural form of the tree and reduces aesthetic value.

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