Well, I started pulling vines on out of another garden bed today. I loosened the soil around the roots to get out as much vine roots as possible.
Even with a leverage fork, it wasn't easy. That a great tool. BTW. The whole thing is solid metal and the bar behind it provides great leverage. It works great. You stab it into the soil then pull back.
When I came across a poison ivy plant in the bed, I stopped and went inside to wash my hands and arms and douse them with rubbing alcohol. I used to be immune to it. Several years ago, I developed a terrible case of it that lasted 2 weeks. I won't risk that again!
But I did dig up a real pile of vines as deep as I could get at the roots.
I'll dig up the poison ivy plants and deep as I can dig, and wearing rubber gloves for protection. I'll have a bucket of soapy water to put them into before I so much as touch a door to the house.
I'm getting there...