On Sat, 22 Mar 2014 18:32:35 +0000, harryagain wrote:

You can buy a fungus to infect it with.
Gets rid of most stumps (by rotting) in a couple of years. Forestry
people use it.

I went for a walk in the forest and collected all kinds of rotten timber.
I put that on top of my tree stump, and after a few months it went rotten
and was easily chopped out with a pick axe.