Sorry, I asked this question on another thread -
I've got a dense layer of 3 or 4 inch diameter rocks about 8 inches under the surface. You can dig them by hand with a heavy shovel, steel digging bar, and softening the ground with water. A 2-
hp handheld gas auger is stopped cold by this layer.
But, as I've got over 300 post holes to dig, I'm trying to figure if a Kubota BX22 has the power and weight to handle this with a
PTO-attached auger, as well as get through this layer with the backhoe for trenching. Otherwise, I'll get a Deere 4210 which weighs 1000 more pounds and has about 50% more
PTO horsepower, and which is the same price, although sadly *without* a backhoe.
I'd buy the Kubota if I was reasonably sure it could do it, but the nearest dealer is 67 miles away with totally different soil conditions, so there can't be any kind of trial run before a purchase.