Weeds seem to have a pecking order. Once the conditions that permit foxtail and fall panicum are erased, there will be other weeds, but none of them will be as difficult to control or as hazardous to crop production.
Acres U.S.A., the monthly magazine of eco-farming, is packed with practical information. But our editors can't fit it all in each month, so some of the richness ends up here. Check out this post, Book of the Week: Weeds — Control without Poisons by Charles Walters, in its entirety and many others in Eco-Farming Daily.