I picked up a new customer that has poor soil, but the lawn is actually in decent shape, a little thin, and it doesn't get very tall but looks nice. My problem is that we mowed it with an Exmark Navigator, which weighs 1140 pounds without an operator and it left white stripes in the lawn where the driver tires contacted the ground. Is this going to kill the lawn in these striped areas? I have never seen this before. This is alkali I believe because around the fences where the grass and weeds have been killed so we don't have to string trim as much has a white powder in the dirt.