"Arthur Davis" wrote:

I was told by a friend that I could put rock salt on a tree stump after
scoring the top and the salt wouldhelp get rid of the stump. Does this work
and how much salt would you use for a 8' diameter stump?

You'll do better with saltpeter, aka potassium nitrate. This is what is
sold as "stump remover".

The nitrates will speed the decay process faster than sodium cloride
(salt).