I had a big barn taken down, and the foundation dug up over the summer. The guy I used just smoothed things up and put a layer of sand over the dirt to level off everything but did not lay down topsoil. The soil under the sand layer is clay. I now need to put in a lawn. I raked over and smoothed out the high spots and tractor ruts so basically, I need advise on how to get grass to grow. Should I get the soil tested or just put some fertilizer on it? Do I need a power seeder or can I just borrow a broadcast spreader? Can I just hose it down or do I really need a sprinkler? Do I need to spread straw over it after I seed, and should I hurry to get it done or is the early fall the best time to do it?