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