There was a similar request a couple of weeks ago to which I replied, but I'll do it again. Walkin the Beans is a song by Greg Brown (of Iowa) about a typical midwestern (not southern) farm kid's chore--walking the soybean fields pulling weeds. If this is the song you want, I have it on a Greg Brown recording and could get you the words. In the meantime I'll listen to it and see if pigweeds and hoes are mentioned.