== Tree surgery == 

 With apologies to those who may still stubbornly use the terms, tree surgery is not considered an appropriate term to describe arboriculture, nor is tree surgeon an appropriate term to describe an arborist.  It's kind of like calling a homemaker a domestic engineer.  Other than perhaps noting in both this and the arborist page that these terms are obsolete, I don't see a good reason to use them as if they were synonymous.  I'm fixing that here by replacing those terms.