It was a pleasant spring day in the mid 50's today and I worked a permission on a farm that has been owned by the same family for at least 3 generations. I went around the outside of the barns and found very little of interest. In the vehicle (not farm equipment) parking area I found lots of modern coins, many were "stinkin' Lincolns" that were rotted out. The metal plate is from a "submersible sewage pump" - typical for a farm I guess. Some .22 shells, a broken spoon and brass hose sprayer.
It was a pleasant hour and a half despite lackluster finds. It's just nice to get out in the sun and get into the zone. Metal detecting is a lot like fishing - you don't necessarily expect to catch fish. It's just a relaxing way to be outdoors.