Permanent Poison Ivy Kill Using Hardwood Ashes - No Pesticides or Digging

It's not an exciting video. In my experience, and that of everyone I've shared this with, simply spreading hardwood ashes over poison ivy slowly kills the entire plant, roots and all. It does not return.
It takes most of a season, but it's been 100% effective for myself and at least 8 other people.
Cheap, easy, and pesticide free.