Similar results were obtained from ground estimates of crown canopy and those made from aerial photographs.

Red spruce is shade tolerant and regenerates well under a crown canopy.

Attributes such as age class, height class and crown canopy closure were not available for these two datasets.

Wildfires may burn the leaf litter but only spread to the crown canopy of forest trees if the fire is very intense.

Crown Lifting: Cutting back and removing low branches in order to raise the crown canopy, thereby allowing access or light under the tree.

The derived relations could be useful to those interested in prescribed burning under a crown canopy, ecological response of trees to fires of varying intensity, and timber losses following forest fires.

Among its most successful projects has been the fitting-out of State's Roadside Rescue fleet which uses vans, station wagons and utilities with fibreglass Crown canopies and equipment to handle arduous emergency work.