Re: Moisture
Yes, I've noticed that there is a fine line between riding over the surface and slinging mud glops. It has been a while since I did it last, so thanks for the reminder!
Re: Growing Grass
In my case, grass is the only thing that keeps our soil from washing away due to highly graded land. In heavy rain storms of years past, and especially last year, yards of topsoil have gotten washed away. The thinnest grass areas are affected first, eroding away and flooding over the healthier grass, killing it. It is a compounding problem which I have to battle constantly to keep in check.
I notice our soil is quite compacted, though it seems to be an 'ok' mix of loam, clay, and sand. The Ph also seems correct so I don't think lime is going to help. The roots don't grow very deeply at all so my I'm hoping is that more/better aeration will avoid a total renovation. (If it isn't completely obvious, lawncare isn't my specialty, try as I might)