Wanting to "cut" a slot in the ground

[MossRoad]

Just did this myself. Rented a Bluebird edger from local rental yard. Most of my edging was going into packed gravel and money well spent!

That's a good option.

 

[SmallChange]

I've thought about something like this based on the 3PT auger I already have. I imagine a modified frame turning the auger to the side and lowering it a bit, and perhaps a small variety of rotary attachments and shaft extensions to replace the auger bit.

 

[LittleBittyBigJohn]

What about a subsoiler? You'd want to weld up something to offset it to one side.

View attachment 4114424

I lowered one of the scarifiers on my box blade to make a shallow trench. It worked fine.