Every time I mowed this summer, I noticed a little bit of rock in the front yard (near the road) sticking out of the grass.  It’s not bothersome to mow over, since it’s very low, but I started to wish grass would actually start growing there and realized that I would need to get rid of that rock in order for that to happen.  So.  I dug it up.  Which was actually TWO large chunks of asphalt! No wonder the grass wouldn’t grow there!