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<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>Philip,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>The volcano mulching phenomenon is indeed a serious threat to urban trees. I dealt with this problem in southern New Brunswick, observed it widely in Quebec, and also in my recent trip to Vermont. I observed that the problem threatens both public and private trees. In addition to crown root anaerobic conditions, I think the increased moisture at the trunk base due to soil elevation (mulch addition) forces the bark to decay, thus leading the sucrose circulation to stop/slow down in the active phloem cells. The resulting loss of growth (or death!!), depends on the adaptation capacity of the specie (I know that Spruces are especially fragile to any soil level changes), and represents a threat to urban forests. <SPAN style="mso-spacerun: yes"> </SPAN>And we pay for this!!!<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>The application of a thick mulch bed at the base of the trunk is so common that I really question myself where to begin in rising awareness concerning tree health at the soil level. In my opinion, the only real advantage of mulching is to keep away the lawn mowers and trimmers from the trunk. However, if improperly applied, the mulch can cause the same problem: damaging the bark.<SPAN style="mso-spacerun: yes"> </SPAN>Seldom are trimmer operators who know the role of tree bark in “stuff” circulation and same can be said for students working on the landscape team who apply mulch beds. They surely want to do a good looking job, like cutting every single grass surrounding trees and rising high & symmetric mulch beds. We pay them for this!!!<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>It seems to me that as long as we will demand trimmers to clean up tree trunks, bark will be damaged. A concrete solution would be to restrict systematically the use of trimmers to fences, park benches, and other metal or concrete infrastructures where we really wish the herbs to be cut down. This solution leads to savings, because the city needs fewer operators to do the job (=less gasoline too!). No trimmers, no need for mulch bed neither (personal opinion), which is another opportunity for saving. <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>All we need is to accept longer grass close to trees, and explain to the few complaining citizens why we now proceed this way. This is one of the fun tasks of the urban forester, isn’t?!<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>I’m sorry about the long reply, but this subject brings me so <I style="mso-bidi-font-style: normal">mulch</I> interest, I cannot be short.<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>Have a nice fall season,<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><FONT face=Calibri>Bruno<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><SPAN lang=EN-US style="mso-ansi-language: EN-US"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal"><FONT face=Calibri>Bruno Chicoine</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal"><FONT face=Calibri>M.Sc. Candidate</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal"><FONT face=Calibri>Université de Moncton</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal"><FONT face=Calibri>Bruno.chicoine@yahoo.com<o:p></o:p></FONT></P><BR></DIV>
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<DIV style="FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, sans-serif">----- Original Message ----<BR>From: "canufnet-request@list.web.net" <canufnet-request@list.web.net><BR>To: canufnet@list.web.net<BR>Sent: Monday, September 1, 2008 1:00:17 PM<BR>Subject: CANUFNET Digest, Vol 46, Issue 1<BR><BR>Send CANUFNET mailing list submissions to<BR> <A href="mailto:canufnet@list.web.net" ymailto="mailto:canufnet@list.web.net">canufnet@list.web.net</A><BR><BR>To subscribe or unsubscribe via the World Wide Web, visit<BR> <A href="http://list.web.net/lists/listinfo/canufnet" target=_blank>http://list.web.net/lists/listinfo/canufnet</A><BR>or, via email, send a message with subject or body 'help' to<BR> <A href="mailto:canufnet-request@list.web.net" ymailto="mailto:canufnet-request@list.web.net">canufnet-request@list.web.net</A><BR><BR>You can reach the person managing the list at<BR> <A
href="mailto:canufnet-owner@list.web.net" ymailto="mailto:canufnet-owner@list.web.net">canufnet-owner@list.web.net</A><BR><BR>When replying, please edit your Subject line so it is more specific<BR>than "Re: Contents of CANUFNET digest..."<BR><BR><BR>Today's Topics:<BR><BR> 1. Volcano Mulch (Philip van Wassenaer)<BR><BR><BR>----------------------------------------------------------------------<BR><BR>Message: 1<BR>Date: Mon, 1 Sep 2008 09:31:39 -0400<BR>From: "Philip van Wassenaer" <<A href="mailto:pwassenaer1022@rogers.com" ymailto="mailto:pwassenaer1022@rogers.com">pwassenaer1022@rogers.com</A>><BR>Subject: [CANUFNET] Volcano Mulch<BR>To: "Canufnet" <<A href="mailto:canufnet@list.web.net" ymailto="mailto:canufnet@list.web.net">canufnet@list.web.net</A>><BR>Message-ID: <024701c90c37$10ea1280$32be3780$@com><BR>Content-Type: text/plain; charset="us-ascii"<BR><BR>This appeared on another list when a colleague of mine recently
visited<BR>Ontario. So my question is to all the Ontario municipal folks on this list:<BR>"why are we still letting this happen?". The meager money we get here is<BR>largely for tree planting and we let other departments or our tree people<BR>destroy the investment in future trees. This has bothered me for years but<BR>no one seems to be able to change this. Why is this?<BR><BR><BR><BR><BR><BR>"All, <BR><BR><BR><BR>Just came back from a trip to Ontario, Canada, and was truly awe struck at<BR>the ubiquity of volcano mulching along virtually every street I drove,<BR>hundreds of miles of nothing but street trees with root crowns covered. This<BR>represents millions of dollars of wasted municipal tree money, as the trees<BR>were for the most part in decline due (I assume from visual observation) to<BR>anaerobic root crown conditions. <BR><BR><BR><BR>Nobody I have spoken with seems to know any reason for its<BR>existence/appearance in the landscape.
<BR><BR><BR><BR>Comments? "<BR><BR><BR><BR><BR><BR><BR><BR><BR><BR>Philip van Wassenaer, <A href="http://b.sc/" target=_blank>B.SC</A>., MFC<BR><BR>Urban Forest Innovations Inc. <BR><BR>1253 Crossfield Bend.<BR><BR>Mississauga, Ontario<BR><BR>Canada, L5G 3P5<BR><BR>Tel: (905) 274-1022<BR><BR>Cell: (647) 221 3046<BR><BR>Fax: (905) 274 2170<BR><BR><mailto:<A href="mailto:Pwassenaer1022@rogers.com" ymailto="mailto:Pwassenaer1022@rogers.com">Pwassenaer1022@rogers.com</A>> <A href="mailto:Pwassenaer1022@rogers.com" ymailto="mailto:Pwassenaer1022@rogers.com">Pwassenaer1022@rogers.com</A><BR><BR><BR><BR>-------------- next part --------------<BR>An HTML attachment was scrubbed...<BR>URL: <<A href="http://list.web.net/archives/canufnet/attachments/20080901/d0a657a6/attachment-0001.htm" target=_blank>http://list.web.net/archives/canufnet/attachments/20080901/d0a657a6/attachment-0001.htm</A>><BR><BR>End of CANUFNET Digest, Vol 46, Issue
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