Ok so im fairly new to this site i bought a house last winter and the yard was horrible. The previous people used the backyard as a parking lot for cars and to turn around so 90% was destroyed. I didn't know much about soil and what not and the yard was almost like a thin layer of process in places so i bought a topsoil from a local recycling place and put down a thin(2") layer and some seed and starter fert. and took a chance. Come to find out the soil is very acidic and nothing really happened. I actually bought new topsoil towards the middle of august and tried again. By the end of october i seemed to have an "OK" lawn. From a far it looked good and full up close you could tell it was pretty thin but getting thicker. My question is this year i went out and was raking the old up and now it seems to be really thin like i ripped half of the grass out, what should i do just overseed and fert. or do i just not have enough topsoil or good enough topsoil. I just want a nice lawn and willing to put the time and money into it but just don't know enough. thanks for the help!