No country would be able to manufacture enough fertilizers you guys are talking about. California with big dairy farms, chicken can't make enough for it own use. One thing I know about chicken manure is that it stinks like a dead animal and that rice paddies that used it saw more leaf growth than rice. Chicken manure was tried in our rice paddies in Sri Lanka in the early 80s. How about promoting efficient methods of using usual fertilizer. So far nobody has died by eating produce grown with artificial fertilizer in California.