You should still have an idea of where the miss was, high, low,left, right etc. Take a knife and score the grass in 36" swaths every 25 inches or so. You'll find the arrow in no time.
top view I's represent cuts in grass

{} I I I -I-> arrow found
You target (missed high Example)
I drew this real nice in excel but couldn't post it Argh!!
Another option would be to use those grass catching judo type points until you can hit target everytime.