Don't know if this is the best place to ask this, but couldn't find a better place.
I have noticed over the past few years that the local farm fields get populated with a pair of pallets leaned up against each other to form a inverted V shape. they are always out near the middle of the field, in a line, and about 500 to 700 feet apart.
Now during the Spring and Summer they are nowhere to be seen, and in late Fall they are out there again. As far as I know (not having been out in the middle of these fields) from driving by every day there is nothing out there that needs protection such as a irrigation pipe, so I can not figure out what purpose they serve.