Hi Kathy, I have what appears to be that same 'weed' on my acres, pretty sure that it is amaranth, so rejoice!

It is closely related to quinoa and lambs quarters, I have personally eaten the leaves,
seed heads, and seeds, and enjoyed them, later into the season the leaves get a little strong and quite salty. I would suggest that if you are going to ingest, try a little bit first, see how it sits with you.
P.S. my sheep and chickens love this 'weed'.