Phil_Graham at mindlink.net
Thu Jun 8 19:28:53 EST 1995
In article <47976.kunde001 at maroon.tc.umn.edu> "kunde001 at maroon.tc.umn.edu" <kunde001 at maroon.tc.umn.edu> writes:
>From: "kunde001 at maroon.tc.umn.edu" <kunde001 at maroon.tc.umn.edu>
>Subject: Re: Tree orientation?
>Date: Wed, 7 Jun 1995 15:32:30 GMT
>On 6 Jun 1995 09:39:27 -0400,
>Paul Stewart <stewart at bud.peinet.pe.ca> wrote:
>>asalter at geko.com.au (Adrian Salter) writes:
>>>I'm looking for information about marking field grown
>>>trees to indicate the north facing side. Why is it done?
>>>Thanks, > >Adrian
>> Funny, just yesterday I heard about this too, on a phone-in radio
>>show out of Halifax, Nova Scotia. Apparently, according to this forester
>>(whose name I didn't catch...sorry) trees do not expend energy
>>symetrically on all sides. The south facing side absorbs more sun energy
>>and so needs to feed itself as well as the less nourished north side.
>>Root growth and food storage follow this trend, and if the tree is
>>replanted out of this orientation it takes time and energy to adapt that
>>it could use growing and fending off disease, etc. That was the gist of
>>what they said. Anyone else know more detail on this? Is it true for
>>other plants as well? For instance ginseng is often transplanted each
>>year, and seedling starts from greenhouses are planted out this time of
>>year. Would faster establishment and growth result from keeping the
>>original orientation when transplanting?
>>ABIOGEN c/o Paul Stewart
>>RR #2 Vernon Bridge
>>Prince Edward Island
>>CANADA C0A 2E0
>>stewart at cycor.ca
>It is generally thought that tree produce more roots on the north side due
>to higher soil moisture contents there. The leaves shade soil on north
>side keeping moisture content higher there. Soil moisture content is often
>the limiting factor for tree growth. With ample available water on the
>north side roots put on more growth than on the south side which dries out
>more quickly during dry spells. I suppose south of the equator this
>phenomenon would be reversed. Any observations from down under?
>Kunde Co. Consulting Foresters
>Roseville, MN USA
Maintaining nursery orientation reduces the risk of sunscald to the trunk
of the newly transplanted tree.
Phil, Certified Arborist
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