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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

Sincerely,
John A. Keslick, Jr.
Consulting Tree Biologist
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.