UKTC Archive

Re: Robinia roots

Subject: Re: Robinia roots
From: "willross583@xxxxxxxxxxx.com"
Date: Jul 12 2019 15:48:51
[Text converted from HTML]
John, Here's a not very good picture of a flattened pine root that I
found growing between a concrete road slab and an Ash subbase so similar
effect but there was no give in road unlike blocks.
Will
Sent from my Huawei phone

-------- Original Message --------
Subject: Re: Robinia roots
From: John Hearne
To: UK Tree Care
CC: 

    Thanks Pedro - that is what I told the client my guess was. But
    as I say -
    I expected more of a flattened cushion which got me looking for
    other
    explanations. Perhaps the bricks are just too light to cause a
    flattened
    form.

    John

    On Fri, Jul 12, 2019 at 3:07 PM Pedro Álvaro
    <pedro@xxxxxxxxxxxx.com> wrote:

    > Hi John,
    >
    > Observing the picture, I reaffirm that types of structures are
    "cushion
    > formation" of roots between compacted soil and bricks, result
    of reaction
    > of forces (pass of pedestrians), and how says Kevin Slezacek
    too:
    > "callous formation from damage from the paving".
    >
    > Best regards,
    >
    > Pedro Alvaro
    >
    > -----Mensaje original-----
    > De: uktc-request@xxxxxx.tree-care.info [mailto:
    > uktc-request@xxxxxx.tree-care.info] En nombre de John Hearne
    > Enviado el: viernes, 12 de julio de 2019 15:59
    > Para: UK Tree Care
    > Asunto: Re: Robinia roots
    >
    > Hi Wayne - it's dark, moist and airy under the paviours. Suits
    roots sir!
    >
    > On Fri, Jul 12, 2019 at 2:37 PM Wayne Tyson <wt750mv@xxxxxx.com>
    wrote:
    >
    > > Esteemed John Hearne:
    > >
    > > What is the cause of the surface development of the root
    system?
    > >
    > > Wayne
    > >
    > > On Fri, Jul 12, 2019 at 4:52 AM John Hearne
    <johnhearne7@xxxxxx.com>
    > wrote:
    > >
    > > > Esteemed collective,
    > > >
    > > > I've had to look at a Robinia that is disrupting some brick
    pavioured
    > > > surfacing causing a trip hazard. The pattern of disruption
    showed two
    > > roots
    > > > were causing minor lifting of bricks over lengths of about
    4-5m.
    > > >
    > > > But there were occasional bricks lifted significantly
    higher and upon
    > > > removing these bricks there was, in each case, the
    underlying circa 3cm
    > > > diameter root with a circa 5cm diameter swelling on top -
    for all the
    > > world
    > > > reminiscent of an emerging pneumatophore.
    > > >
    > > > I would expect, if anything, maybe flattening in regions of
    contact
    > with
    > > > the paving. But waht are these structures? Sucker initials?
    ENORMOUS
    > > > N-fixing nodules?
    > > >
    > > > I am going to suggest chiselling them off to bet the bricks
    back flat -
    > > but
    > > > thought I ought to know what they were?
    > > >
    > > > Help appreciated.
    > > >
    > > > John
    > > >
    > > > --
    > > >
    > > > Hearne Arboriculture
    > > >
    > > > www.hearnearboriculture.com
    > > >
    > > >
    > > >
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