My elderly neighbor has a parking strip that is infested with goat head weeds. With my neighbor's permission, I'm planning on ripping out the weeds and replacing with weed cloth and mulch. To prevent needing to do this again in the near future, I'd prefer to sterilize the ground before laying the mulch.
The parking strip is on a hill that drains into a major road. I'm not at all concerned about the runoff damaging plants we want to keep, and my first inclination is to salt the ground.
How much salt/foot of parking strip will do the trick? Alternatively, are there any better ways of accomplishing the goal of sterilizing this soil?
Again, this is all with the consent of the homeowner, who would have preferred that the city just paved the strip in the first place. :-)