Many tree problems are associated with the following: They are Case
Sensitive.

Unhealthy Trees from the Nursery / Improper Planting
http://www.treedictionary.com/DICT20..._planting.html

Improper Mulching -
http://www.treedictionary.com/DICT2003/M/mulch.html

Improper Pruning
http://www.treedictionary.com/DICT2003/tree_pruning

Improper Fertilization (See A Touch of Chemistry)
http://www.treedictionary.com/DICT2003/shigo/CHEM.html

Tree Farming and Related Problems
http://www.treedictionary.com/DICT2003/SOUND/

Troubles in the Rhizosphere
http://www.treedictionary.com/DICT2003/shigo/RHIZO.html


For lucid information on the care of trees and their associates I would most
highly recommend www.shigoandtrees.com . Dr Shigo taught A NEW TREE BIOLOGY
worldwide. His stuff was translated in, but not limited to, Spanish,
German, Japanese, Italian, etc. It was common for him to be dissecting
trees in, but not limited to, Australia, Germany, Spain, Italy and of course
USA which I attended and dissected trees more than most people, not as much
as some. I recommend this site for your tree care requirements.

Sincerely,
John A. Keslick, Jr.
Consulting Tree Biologist
http://home.ccil.org/~treeman
and www.treedictionary.com
Beware of so-called tree experts who do not understand tree biology.
Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us
that we are not the boss.
Some people will buy products they do not understand and not buy books that
will give them understanding.