At the given coordinates, you'll find the usual cache container. As with the first two in the series, your task is to figure out how to open it. So, yes, this is a field puzzle, a very simple one. To solve it, you'll need to find a handy tool--wow, that sure will be easy, since it's within a few inches of the cache--and then figure out how it might help you access the logbook.
Newlyweds Victoria and Trevor own the farm and have given permission for a geocache to be placed here to honor the Carroll County Quilt Trail. You might see fresh farm produce (donut peaches are JAF's favorite, though their availability is very short), interesting farm equipment (some of which your kids may play on), or (in season again) another fascinating kind of puzzle: a corn maze! Even in quiet little Marston, you will find fun and beauty!
Please be sure to observe this STRICT rule in grabbing this cache, out of respect for the owners who've given their permission to allow us to place it on their property: DO NOT VISIT THE CACHE OR THE PROPERTY AFTER DARK UNLESS THE STORE IS OPEN!