Just because some fertilizer is good, doesn't mean that more is better! Always apply fertilizers and other lawn products at label rates using the proper equipment. This is a local Highlands lawn- or was a lawn I should say. I get a call about something like this a couple times a year from both members and non members alike. The most interesting cases involve people who try to fertilize a lawn by hand, resulting in many crescent-moon-shaped dead spots! With this much fertilizer in the soil, you can't just reseed it because the salt content is through the roof- nothing will grow here until time and rainfall leach/dilute the high levels of salts. There is no easy (or inexpensive) fix. In these cases I often recommend planting Cacti, and adopting a desert motif. That last sentence was a joke :)