Perhaps this has gone too far off topic. :/ Anyways, upon first seeing this thread, I thought of simply trying out a patch of it for the chickens and ducks to complement their midsummer free-ranging efforts. But looking farther into it and doing a little research, I think dutch white clover may be a good long-term solution for suppressing the japanese stiltgrass that has been taking over this area! Seeing as it's cold-resistant, and the stiltgrass comes a good month later than the first few cold-hardy plants, white clover might have a chance. If seeded thickly enough, that is. Stiltgrass has a habit of crowding most other weeds out first. In addition to those, clover's nitrogen fixing capabilities are interesting as well.