UKTC Archive

Re: Whacky? a change of subject line - Miyawaki

Subject: Re: Whacky? a change of subject line - Miyawaki
From: Michael Richardson
Date: Nov 30 2021 18:25:57
That would never work now in Toronto.  Non-native earthworms (they all are
here) have managed to destroy the organic (humus) layer in forests.  THis
is having an effect now on regeneration, soil and slope stability, nutrient
cycling, etc.


Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

  <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Tue, Nov 30, 2021 at 1:21 PM Julian Dunster <jd@xxxxxxxx.ca> wrote:

The main issue being that they hardly have any roots...............

On Behalf of Dunster and Associates Environmental Consultants Ltd.


Dr. Julian A Dunster R.P.F., R.P.P.., M.C.I.P., ISA Certified Arborist,
ASCA Registered Consulting Arborist # 378,
ISA Tree Risk Assessment Qualified
Honourary Life Member ISA + PNWISA

North American distributor for Rinntech
www.dunster.ca
www.treelaw.info
www.rinntech.info

On Tue/11/30/2021 7:37 AM, Michael Richardson wrote:
Root pruning of nursery stock is a huge issue.  Dr. Newcomb spoke of the
issue years ago and how fibrous vs,tap roots are created.

I would say that 95%+ of nursery stock, particularly b&b and potted, has
major root issues.



Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

   <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Tue, Nov 30, 2021 at 10:27 AM Jim Quaife <jq@xxxxxxxxxxxxxxxxx.co.uk>
wrote:

Hi Michael,
Many (many) years ago I worked on a large forest nursery and all 1-year
seedling beds (all species) were undercut to promote fibrous roots.
Jim

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info [mailto:
uktc-request@xxxxxx.tree-care.info] On Behalf Of Michael Richardson
Sent: 30 November 2021 15:20
To: UK Tree Care
Subject: Re: Whacky? a change of subject line - Miyawaki

Various people are doing various projects.

One of my (well lots of people) findings is that acorns establish better
than nursery stock trees.  What seems to be happening is that all oaks
have
a tap root, if this tap root is not nipped within a couple of days of
emerging as the radical it will begin drilling to the pot bottom and
then
become pot bound.  Precocious oaks can be planted about September 21
onwards with Blue Jays and rodents limiting success (roadsides are great
places for rodents feeding on discarded food from vehicles), while the
red
oak group can be collected and kicked into the soil later in the fall.

The primary limiting factor on many of the sites is the contoured,
compacted "soils".  If early successional plants are used they seem to
be
better able to break compaction and later successional plants then have
routes to establish their roots in.  Various poplars, white (paper)
birch,
some cherries, some ash, Eastern Red Cedar, etc. can have far greater
success in the early stages of establishement while soil is altered,
organic matter added and soil surface temperatures are cooled.  Later
succesional plants will struggle in the beginning and do better later.

Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

   <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Tue, Nov 30, 2021 at 10:00 AM AV Arboriculture <mike@xxxxxxx.co.uk>
wrote:

That's great to hear Michael. Are you solely using seeds?  Do you know
who
instigated this planting method?

BTW Miyawaki's method has been around for about 50 years...

Mike




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The UKTC forum is supported by Bosky Trees arboricultural consultancy and
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