Archived posting to the Leica Users Group, 2009/08/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 >>>> >>>> >>> >> >> >> -------------------------------------------------------------------------------- >> >> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >