Frank, Ours is a very ledgy site; shale loam, with emphasis on shale. We've been working with a fencing contractor who resorted to pre-drilling each hole with a rock drill before pounding in posts (metal or wood). No failed posts, most got about four feet in.
I'd also be a bit extra concerned about water stress on your site- dwarf root systems on shallow soils not a good mix. Good Luck! Dan Wilson Hicks Orchard Gr anville, NY Sent from my iPad On May 24, 2555 BE, at 1:27 AM, Michael Vaughn <mvaugh...@gmail.com> wrote: > FrANKLYN, > > I have a 4 acre planting that has a layer locally called a "Hardpack"that > occurs about 12 to 18 inches down. > I used a skid steer with a hydraulic Ram for pounding/driving posts. I drove > 5-6" treated southern pine posts 4 feet down > with little trouble. Beside the End posts/anchors there is another post every > 30 ft or so. > In between the posts I planted 10 to 11 Tall spindle trees all secured to 4 > layers of High tensile wire spaced every 2 ft. > This anchoring has been in the ground for 4 years now and is quite stable. > > On Wed, May 23, 2012 at 10:20 AM, Frank Carlson > <fcarl...@carlsonorchards.com> wrote: > We are inquiring if anyone else has hit unexpected ledge in anchoring a tall > spindle planting? We are hitting it 18inches down, surely not enough to > anchor a post in the soil. > > One idea we have is to drill a 1&3/4 inch hole in the ledge and put a 12 foot > galv steel fence post in, but it is only good for every other one because of > its strength to bend when you use more than one. > > Experience or ideas ????? > > Thanks, > > Frank & Bruce Carlson > > > > Franklyn W. Carlson, Pres. > > Carlson Orchards, Inc. > > 115 Oak Hill Road > > P.O.Box 359 > > Harvard, MA. 01451 > > 617-968-4180 cell > > 978-456-3916 office > > > > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop > > > > > -- > Michael D. Vaughn > Owner / Manager > Pie-In-the-Sky Orchards > > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.net > http://virtualorchard.net/mailman/listinfo/apple-crop
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