Again, the rhizosphere should be addressed in your project.

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

Sincerely,
John A. Keslick, Jr.
Consulting Tree Biologist
www.treedictionary.com
and
http://home.ccil.org/~treeman
Watch out for so-called tree experts who do not understand tree biology.
Storms, fires, floods, earthquakes, tornado's, volcanic eruptions and other
abiotic forces keep reminding humans that they are not the boss.

"Henry VIII" wrote in message
...
We have just moved to a new home that has two fifty-foot eucalyptus trees
in the back yard about 20 feet from the house. The area where the trees
are is plain dirt that has never been planted/irrigated. The tree roots
do not appear above ground.

We'd like to pour concrete in the back yard area to make a patio. Any
suggestions on what to do or not do when laying out the concrete forms
such as minimum distance to the trunks?

The trees have been here a long time and we don't want to do anything that
will injure them. This is in Los Angeles.

Thanks.

symplastless wrote:
Again, the rhizosphere should be addressed in your project.

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


Unrelated to the question, as usual.