Oh, I don't think we're too off track here, Mary! We WERE talking about removing weeds. Actually, that knife looks it would work better than the weed fork I have. Heh, but I only paid $1.00 for my crummy weed fork.
And didn't someone mention carefully spraying with Roundup? I came across a really cool additive for sprayers that colors it so you can see what you've sprayed. Seems like it would be handy for making sure you didn't hit something you really didn't want to spray.