Hi guys, so happy to have this resource! I am working in the tropics where we have about the most stubborn weeds I can imagine. Does anyone know of a good plant based herbicide. It doesn't really have to be plant based but something natural and free of synthetic chemicals. I have two purposes here. On occasion I have to clear out an old and overgrown pasture to plant new seed and other times I have to maintain my road so the plants don't deteriorate it. I have heard of the Nitrogen overdose method but I doubt it would work for the roads as it makes the dirt better in the end and I need a bit of a more permanent solution. However if thats the best natural option there is I can just keep applying for the roads...have yet to try it but will be doing so soon.