[CANUFNET] Soil Cells, Salt, & Poor Leaf Expansion

Mon Jun 6 10:46:48 EDT 2022

A Soil Cell is a structure that holds large volumes of uncompacted soil.
They have been used extensively to grow street trees and manage street and sidewalk runoff. - LID
The Soil Cells themselves are inert.  It is the design of the stormwater integration that is key to success.

A robust Water In and Water Out design needs to be part of any integration of salted street runoff into the soil volume in the Soil Cells. 
The literature is full of long term daylighted bioretention facilities receiving salted street runoff and growing healthy trees when the Water In and Water Out design is adequate.
There are many long term soil cell installations that receive salted street runoff and the trees are thriving. 
Eg: The Queensway - Toronto Re: https://www.deeproot.com/case-studies/silva-cell/queens-quay-2/

Michael James  |  General Manager
t 800 561 3883 m 604 220 9521 
DeepRoot Canada Corp.
LinkedIn | Flickr | Twitter | Blog
Silva Cells - Proudly Made in Canada

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Today's Topics:

   1. Re: Soil Cells, Salt, & Poor Leaf Expansion (Michael Richardson)
   2. Re: Soil Cells, Salt, & Poor Leaf Expansion (Mark Carroll)

----------------------------------------------------------------------

Message: 1
Date: Fri, 3 Jun 2022 17:45:27 -0400
From: "Michael Richardson" <mrtree at kos.net>
To: "Canadian Urban Forest Network" <canufnet at list.web.net>
Subject: Re: [CANUFNET] Soil Cells, Salt, & Poor Leaf Expansion
Message-ID:
	<921b1635eb279b1a3a080c2933e93579.squirrel at webmail.kos.net>
Content-Type: text/plain;charset=iso-8859-1

There are a number of issues to consider, all require investigation and testing.

Soil cells and soil pits have been in the news for multiple failures in Ontario (and lots that the news has not been reported).

Hire someone to help you.

M

> Hello CANUFNET,
>
> I'm wondering whether anyone has come across this.  We have two 
> streetscape projects (different municipalities) that include soil 
> cells installed over the last two years.  The Freeman Maples, in 
> particular, have been unsuccessful and typically leaf expansion begins and then stops.
>  The very small leaves turn brown, as though scorched.  On one 
> project, Freeman Maples were also planted in sod and the trees are fine.
>
> Both projects were installed by the same contractor and I believe they 
> used soil from the same source.  In both projects, stormwater is 
> directed to the soil cells from the catchbasins.
>
> The contractor has indicated that it is the high salt level in the 
> soil (in the soil cells) that is causing the trees to fail.  They have 
> had the soil tested (probably at the tree pit) and it is high in salt.
>
> That said, Freeman Maples have been used successfully in soil cells on 
> other projects.
>
> I haven't seen this symptom attributed to soil salt... where the buds 
> break and the leaves start to expand, but then stop.  Is this a 
> symptom of high salinity or is this perhaps something else, 
> exacerbated by less than ideal soil salt levels?  I've had someone 
> suggest maybe verticillium.  Any ideas?
>
> [cid:image001.png at 01D8772A.AB051B40] 
> [cid:image002.png at 01D8772B.08638AB0]
>
> Thank you.
>
> Regards,
> Alison
>
> Alison Bond BSc MSc BLA OALA CSLA
> Landscape Architect and Certified Arborist
>
> ENVISION-TATHAM Inc.
> 115 Sandford Fleming Drive, Suite 200, Collingwood, L9Y 5A6 
> abond at envision-tatham.com<mailto:abond at envision-tatham.com> I Tel:
> 705.445.0422<tel:7054450422> I Fax: 705.444.2327<tel:7054442327> I Cell:
> 705.994.2059<tel:7059942059> I
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------------------------------

Message: 2
Date: Sun, 5 Jun 2022 14:12:01 +0000 (UTC)
From: Mark Carroll <environment1st at rogers.com>
To: Canadian Urban Forest Network <canufnet at list.web.net>
Subject: Re: [CANUFNET] Soil Cells, Salt, & Poor Leaf Expansion
Message-ID: <1805440332.7430094.1654438321842 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Hi Alison
I have been experimenting with the use of sugar water. I have been told that sugar in soils will displace salt. I have use unrefined all natural cane sugar or molasses. Water the tree habitat in the spring just before leaf break or just as the frost comes out of the ground. I use about 1 to 2 cups of sugar or molasses for every 500 liters of water in a deep rooting fertilizer. The sugar will help with fungi and bacteria production in the soil.?I have no documented proof, other than those trees that seem to survive in high road salted areas.?
Still looking into this, but it takes nothing to try. I had a good fertilizer regiment for newly planted trees. No nitrogen, high in natural? nutrients and a mycorrhizae inoculant. My efforts are to mitigate good soils and root growth. A little magnesium sulfate in the water will help trees uptake the fertilizer.
Other things to take into consideration,??Heat island effect from one site to the other. Is one in shade and the other in full sun?Traffic pollution?
So much to consider when dealing with street trees...
Hope this helps....regards

Sent from Rogers Yahoo Mail on Android 

  On Fri., 3 Jun. 2022 at 3:27 p.m., Alison Bond via CANUFNET<canufnet at list.web.net> wrote:    <!--#yiv4088738510 _filtered {} _filtered {} _filtered {}#yiv4088738510 #yiv4088738510 p.yiv4088738510MsoNormal, #yiv4088738510 li.yiv4088738510MsoNormal, #yiv4088738510 div.yiv4088738510MsoNormal {margin:0in;font-size:11.0pt;font-family:"Calibri", sans-serif;}#yiv4088738510 span.yiv4088738510EmailStyle17 {font-family:"Calibri", sans-serif;color:windowtext;}#yiv4088738510 .yiv4088738510MsoChpDefault {font-family:"Calibri", sans-serif;} _filtered {}#yiv4088738510 div.yiv4088738510WordSection1 {}-->
Hello CANUFNET,

 ?

I?m wondering whether anyone has come across this.? We have two streetscape projects (different municipalities) that include soil cells installed over the last two years.? The Freeman Maples, in particular, have been unsuccessful and typically leaf expansion begins and then stops.? The very small leaves turn brown, as though scorched.? On one project, Freeman Maples were also planted in sod and the trees are fine.

 ?

Both projects were installed by the same contractor and I believe they used soil from the same source.? In both projects, stormwater is directed to the soil cells from the catchbasins.?

 ?

The contractor has indicated that it is the high salt level in the soil (in the soil cells) that is causing the trees to fail.? They have had the soil tested (probably at the tree pit) and it is high in salt.?

 ?

That said, Freeman Maples have been used successfully in soil cells on other projects.

 ?

I haven?t seen this symptom attributed to soil salt? where the buds break and the leaves start to expand, but then stop.? Is this a symptom of high salinity or is this perhaps something else, exacerbated by less than ideal soil salt levels?? I?ve had someone suggest maybe verticillium.? Any ideas?

 ?

 ?

Thank you.

 ?

Regards,

Alison

 ?

Alison Bond?BSc MSc BLA OALA CSLA

Landscape Architect and Certified Arborist

?

ENVISION-TATHAM Inc.

115 Sandford Fleming Drive, Suite 200, Collingwood, L9Y 5A6

abond at envision-tatham.com?I Tel:?705.445.0422?I Fax:?705.444.2327?I Cell:?705.994.2059?I?https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.envision-tatham.com%2F&data=05%7C01%7C%7Cf4109e6370954267d1e108da47bfdd16%7C7a8ed4b96a0b4839be94c2c098cbedd9%7C0%7C0%7C637901186632429613%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=q1flKZGPP6ZpgF2XrI28iJb65eDZN66KYzf2NgPSeik%3D&reserved=0

This email may contain confidential and/or privileged information for the sole use of the intended recipient. Any review or distribution by others is strictly prohibited. If you have received this email in error, please contact the sender and delete all copies.

 ?

 ?

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