Originally Posted by 
vnx205
				
			 
			Some of the soil around Yass was something like that. The surface was reasonably firm, but under that it was the consistency of porridge.
Years ago I pulled off the side of the road with the Series III with a light box trailer behind to load a bit of firewood. As I drove forward, the surface was barely marked. I backed up a bit to make it easier to avoid a small sapling and once again, the tyres barely left a wheel rut.
As I drove forward, I was crossing some tyre tracks for the third time. I went through the top layer and immediately sank to the diffs. A small tractor was all that was needed to solve the problem.
I saw a similar soil profile on my property on the Boorowa Road. There had been some rain so for a couple of weeks an earth moving contractor tested the soil to see if he could bring his machinery in. He used a length of steel rod which he forced down into the dirt. The first one or two hundred mm took quite a bit of effort, but below that he could push the rod down with no effort at all.
Some soil looks boggy and easily leaves footprints. That soil offered no clue to what would happen if you broke through the surface.