I literally salt and vinegar the ground after ripping it out. I don’t burn it, since I live in California and burn piles are generally frowned upon (but are allowed a few times per year). I send it off to the municipal compost, where it does at least get somewhat cooked. Then I go over it with one of these bad boys to get any stragglers: https://stickerburrroller.com/product/sticker-burr-removal-tool/ Doesn’t matter, they come back strong several times per year.
Eastern boxelder