Lifting - Is the pruning operation to raise the crown / canopy. It involves pruning or removal of branches to increase the distance between the base of the canopy and ground level. It is Normally carried out to improve access or provide visibility beneath the canopy.
Thinning - This involves the reduction in the density of the crown. This operation would not normally be carried out on conifers, so it is generally confined to deciduous broadleaf trees. Trees may br crowned thinned to reduce damage that could result from crown resistance to strong winds. Crown thinning may also be carried out to admit more and light into and through the canopy.
Deadwooding - This involves the removal of deadwood from the trees and is normally carried out for cosmetic and of course safety reasons.
Cleaning Out - This includes the removal of dead, diseased, damaged, weak and crossing branches. Epicormic growth and water shoots may also be removed. Cleaning out also entails the removal of foreign objects and climbing plants such as Ivy.