Hello, my name is William today came to your property for your round for application and like we had discussed I inspected the back lawn that had some thinned out/ bare areas the lawn in the back section where the lawn is receding, is very compact and starting to crack due from drought to fix this problem, I'd recommend putting topsoil down in those areas that the grass is no longer growing in and applying grass seed with the topsoilmixed in, this will allow the grass to route properly into the topsoil and then down into deeper soil beneath watering these areas where the crack dried out soil is very important so the roots do not suffer damage. I checked to see if it was any type of insects and did not find any upon inspection there are some seasonal grass, such as pull a new one that I found as well throughout the lawn, and that could also be another factor on why the areas are not growing grass. I did notice that the tips of the grass are in a shredded brown discoloration pattern, whi