Xref: news7 rec.arts.bonsai:57783

And I'd guess that the Ecto-type probably come in on what soil
clings to a collected tree's roots (even when bare rooted and
"all" soil is washed away) or in remnants of "old" soil in a
long-potted tree.


Mycorrhizal fungi, no matter what kind, have one thing in common:
part of their mycelium is WITHIN the tree root. You can wash the
roots completely of ALL soil, and the tree will still be mycorrhizal.
--
Nina Shishkoff

Riverhead, NY

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