Archived posting to the Leica Users Group, 2009/08/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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