Mark Reed wrote: I just clear narrow rows between the existing weeds and leave the weeds in place until the corn seeds have sprouted and the plants are tall and strong enough not to be pulled up by birds. I think the weeds basically act as camouflage hiding the seeds and seedlings and or confusing the critters. The corn often takes off slow but once it's a foot or so tall I hoe or pull the weeds and leave them on the ground between the rows or around the hills. Once the corn, as weak as it may appear at the time is freed from the weed competition it explodes into growth, very quickly.
Pretty much exactly what I did this year. I still had to replant a lot of corn, but fortunately the second planting mostly survived.
In my case we have birds, various mammals, a wide variety of worms and bugs that all love sprouting corn. Most years I replant at least 10% and some years a lot more than that.