Archived posting to the Leica Users Group, 2009/08/16

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Subject: [Leica] IMG: Information Needed on Cause of Lawn Circle
From: jhnichols at lighttube.net (Jim Nichols)
Date: Sun, 16 Aug 2009 16:11:48 -0500
References: <978FB258646E44CAA3F682B552AF1BCE@jimnichols><4A886765.9060101@gmx.de> <CB7F8BE8480548F485A19CAF801CA829@jimnichols> <852C271A-7208-4A68-95CB-3B7E11720BD5@me.com>

Thanks, Gerry.  That agrees with the shape and growth of this ring, but 
mushrooms appear in a different part of my yard, primarily where a tree has 
been removed.  I don't recall seeing any around the ring, but I could have 
overlooked them.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Gerry Walden" <gwpics at me.com>
To: "Leica Users Group" <lug at leica-users.org>
Sent: Sunday, August 16, 2009 4:03 PM
Subject: Re: [Leica] IMG: Information Needed on Cause of Lawn Circle


>I think these are caused by a tread fungus and here is an explantory  clip 
>from a web site:
>
> "These descriptions are typical of fairy rings caused by a diverse  family 
> of fungi called basidiomycetes. Fairy rings might be six inches  to two 
> feet wide and can be anywhere from two feet to hundreds of feet  in 
> diameter and expanding yearly.
> The presence of mushrooms usually indicates an organic source of 
> nutrients, such as a buried tree stump, is nearby. When you see a 
> mushroom growing in a lawn, you are only seeing a small part of the 
> fungus. The fungus also grows underground as a thread-like mass that  is 
> called mycelium. This mycelium tends to grow in all directions from  a 
> central point. Thus, an invisible circular pattern occurs. The  fruiting 
> bodies (mushrooms) then tend to appear in a circular pattern."
>
> This was taken from 
> http://www.ppdl.purdue.edu/ppdl/expert/Fairy_Rings.html
>
> Hope this helps!
>
>
>
> Gerry
>
>
>
> Gerry Walden
> +44 (0)23 8046 3076
> Web: www.gwpics.com
> Blog: www.stockuk.blogspot.com
>
>
>
>
>
> On 16 Aug 2009, at 22:01, Jim Nichols wrote:
>
>> Hi Douglas,
>>
>> The only structure that ever adorned these lots before our houses  was an 
>> American Civil War earthwork on the opposite end of my lot,  overlooking 
>> the roadside at that time.  That disappeared forty years  ago.
>>
>> Thanks for the feedback.
>>
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message ----- From: "Douglas Sharp" <douglas.sharp at 
>> gmx.de
>> >
>> To: "Leica Users Group" <lug at leica-users.org>
>> Sent: Sunday, August 16, 2009 3:09 PM
>> Subject: Re: [Leica] IMG: Information Needed on Cause of Lawn Circle
>>
>>
>>> Hi Jim,
>>>
>>> have you had very little rain recently?
>>>
>>> This looks like what happens when some kind of structure is at  shallow
>>> depth below the surface. Both sides stiil get enough water from  deeper
>>> in the ground, but above the structure everything dies off. Very  useful
>>> for archaeologists but not so good for a nice green lawn.
>>>
>>> Could be an old wall or foundations, the rim of an old pond (hard 
>>> packed
>>> clay), an old farm building or similar.
>>>
>>> If there's been a lot of construction work with pretty deep  foundations
>>> being dug or pipelaying in the neighbourhood, it could mean that the
>>> groundwater table has fallen.
>>>
>>> We had a similar effect in our garden caused by "lenses" of clay and
>>> sand. These filled with rainwater and made circular areas that  wobbled
>>> like quicksand. I had to dig a criss-cross of trenches almost 3-feet
>>> deep through the garden to get it draining properly.
>>>
>>> Cheers
>>> Douglas
>>>
>>>
>>>
>>> Jim Nichols wrote:
>>>> I know there are many knowledgable people on these two lists. I am 
>>>> looking for a hint on the cause of a circle of dead grass that is  very 
>>>> well defined on my lawn and extends, faintly, into the  adjoining lawn.
>>>>
>>>> I recall that a cherry tree once existed in this general area in  the 
>>>> neighboring lawn. I had a maple in my yard that was damaged by  a wind 
>>>> storm and removed.  However, neither of these was near the  center of 
>>>> the circle.  I have heard that maple roots can cause  problems in 
>>>> grass, but no previously-existing root circle matches  what I now 
>>>> observe.
>>>>
>>>> Anyone got a suggestion?
>>>>
>>>> http://gallery.leica-users.org/v/OldNick/Lawn+Circle.jpg.html
>>>>
>>>> Jim Nichols
>>>> Tullahoma, TN USA
>>>>
>>>> _______________________________________________
>>>> Leica Users Group.
>>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>>
>>>>
>>>
>>
>>
>> --------------------------------------------------------------------------------
>>
>>
>>>
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>>
>>
>>
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>
>
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> 




In reply to: Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] IMG: Information Needed on Cause of Lawn Circle)
Message from douglas.sharp at gmx.de (Douglas Sharp) ([Leica] IMG: Information Needed on Cause of Lawn Circle)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] IMG: Information Needed on Cause of Lawn Circle)
Message from gwpics at me.com (Gerry Walden) ([Leica] IMG: Information Needed on Cause of Lawn Circle)