I might try an alternative method I heard about, which is to drench the weeds in boiling water, which is supposed to kill them within a day. I don't know if it would make their remains any easier to dislodge from the ground, though, or if it would also kill their seeds. If the foxtails stay in the ground and their seeds can still germinate, Ill have gained nothing, and the yard will only turn brown sooner.
Because of my unintentional nap, my dinner has been long delayed. Sweet potatoes take a long time to bake, and I didn't get mine into the oven until after nine o'clock. It will be ready soon, though, so I'd better go start cooking the other dishes. I hope I can avoid any unintended naps tomorrow.