Reducing the overall size of a tree by a specified amount.
Reasons for Crown Reduction – to increase light, reduce overall volume, weight and sail to the tree. If your tree is close to power lines etc then this could be a viable option.
Aesthetically – to create a tidier looking tree and improve form.
Before Reduction 
After Reduction 
Small Reduction 
Very Large Reduction 
Large Hedge Reduction 
Very Hard Reduction of Veteran Oak (for safety purposes in process) 
Reduction in Progress 
Monolith of a Veteran Oak in Progress