Try contacting Brian Myers of CSIRO, Division of Forestry
who is running a series of trials on the irrigation of
Eucalypts (and other species) using sewage effluent.
The study is focusing on water use and so Dr.Myers should
have useful references on ETcrop etc.
You can contact him in Canberra, Australia on 6-281 8211
Andy Kenyon (tanglc)