I do hope you are kidding with that remark about DEF.
That is nothing more than concentrated urea fertlizer and water, although it is a bit more pure. I spray the stuff on lawns to make them green.
Poured out in the grass, I have no doubt it will cause a brown spot, but if you watered it down it would only make a green spot. I'm pretty sure it would have no killing effect on a tree stump.
That is nothing more than concentrated urea fertlizer and water, although it is a bit more pure. I spray the stuff on lawns to make them green.
Poured out in the grass, I have no doubt it will cause a brown spot, but if you watered it down it would only make a green spot. I'm pretty sure it would have no killing effect on a tree stump.