Annual weed. My ideas. If you cannot find horses to eat it--let the frost kill it completely. Then cut the dead, brown residue plants with a saw-blade string trimmer. If ag equipment is available why not sickle-mow, bail like hay or cut it, like corn. If you cannot burn it--bundle it up, and tie the bundles with twine--haul away. I am not sure from the pictures if it is a yard--or a more open rural location. Seed grass in the fall--if this is possible--main seeding would probably have to be in spring. Next year, short mowing should keep it down after the seeds in the soil begin to arise. Tall weeds do not tolerate mowing. When the new grass is 4 inches tall--plan to spray in spring after ragweed appears--just to be sure. A broadleaf control like Trimec should work--provided you sock it on early--when the new ragweed is small and tender. Maybe follow-up with triclopyr if you reach the yearly application limit on the 2,4-D.