In article <01HFPZYF0DPI8X2YVR at delphi.com>, MARBUT at DELPHI.COM writes: To get started with mycorrhizae you might try: The Ecology of Mycorrhizae by Michael F. Allen, Cambridge University Press, (ISBN 0 521 33551 1) in paper for about $30. It's technical, but readable. -Jerry-