i sodded my yard around the 4th of july, with kentucky bluegrass. i'm in northern IL. the lawn looked great for the first month and a half. but then i started to get these darker green, dry areas. randomly in my lawn. i took pics of one area in the front yard. when you look at these dry areas from certain angles, it looks darker green. i have a sprinkler system, and i watered real good at the begining, then i cut back the water afterwards. i used a strarter fertilizer when i placed the sod, then afterwards i put down milorganite fetilizer, towards the end of july and mid-august. the milorganite is an organic fertilizer with 5% nitrogen and 4% iron. http://www.milorganite.com/home/ did i burn my lawn? watering the lawn doesnt seem to help the dry areas. the ground is moist below these dry-looking areas. the soil is a claylike, not really black. there is sand further down, when we excavated.