Ekka I'll put this PDF in the tree fact threads too, its a very well written piece laying out the essential elements of pollarding and its impacts on tree physiology written in Oct 2006 and focussing on Italian cultural and historical experience. Combine this with the recent(ongoing) study being done at the Ancient Tree Forum and you've got just about all the data anyone could need on the topic.
Pollarding and tree physiology Italy.pdf
Sean
