m1ft wider than your tractor if you want to subsoil it.  John  Deere use to recommend 10 to 15  engine horse power for a plain old chisel plow. ( we use to use a 12ft Krause chisel  behind a 125hp JD 4430 in our heavy soil worked fine .   The problem with your bog tractor you will probably destroy the plow  The best plan Iis to go shallow than go over it a second time deeper that's what we did . I have the same probleIf it ever driys out   I will have  to experiment  .ha,ve all the tools. I /