"Bob Engelhardt" wrote in message
...
On 11/17/2014 2:21 PM, dpb wrote:
The origin of the species...

http://www.asabe.org/awards-landmarks/asabe-historic-landmarks/graham-hoeme-chisel-plow-38.aspx
...

I followed that a bit & came to wiki. One thing that it said was
that chisel plows require 10 - 15 hp PER shank/chisel! (Because
they go so deep - 8-10".)


http://www.yesterdaystractors.com/cg...using&th=29547