What is the name for a Sub surface plow?

[nickzim]

Several years ago I borrowed a 3-point equipped mini-dozer. On the rear it had what I would describe as a sub-surface plow. It looked a lot like a long scarifier or cutter from a standard grader box.
In essence you could lower it several inches into the ground and it carved out a tunnel if you will. It allowed yard drainage without digging a ditch. I ran several passes down my hill and it pulled off a lot of runoff water
I suppose it could have been a custom build. I've tried to do this with my grader box but depth is not very deep. In addition if dragging only one scarifier, there is a lot of side load on the 3-point. I'd like to buy one. don't know the name to search for it. Thank for your time
'

 

[LouNY]

sub soiler

 

[LD1]

Yup....in tractor lingo it's a subsoiler.

If you had something similar on a dozer it was probably called a ripper.

 

[workinonit]

Subsoiler and when you attach a plow point to it we call it a middle buster. Nowadays the subsoilers are much different than the old ones in that they go much deeper and have trip functions or shear pins on them.

 

[jeff9366]

You will need a subsoiler specifically designed for the limited TPH vertical adjustment on subcompact tractors.

 

[Egon]

Mole plow, Mole ripper.

 

[nickzim]

Ah, the internet can be a wonderful place. Thanks All! I suppose the trick is knowing where your powerlines and such run 1st
I've got a Kubota BX-25. I saw one mention of a shear pin. On the one I borrowed years ago I folded the center link. Had to buy a new one.
Or I guess I could have been an Axxhoxe neighbor and returned it broken.

 

[workinonit]

Yea, on my place if I'm running a 2 or 4 row subsoiler bedder I'm constantly hooking old fat lighter stumps. Some will pull out and some will shear a pin or trip the plow.

 

[JethroB]

Mole plow, Mole ripper.

I first learned of a mole plow (or plough) in a British video about old methods of drying out wet fields.

 

[workinonit]

We subsoil for the opposite reason. It opens up the subsoil layer so moisture can rise during the hot dry conditions.