With turkey season around the corner, should I cut down my oats food plot or leave it grown up?

I would say it all depends on your style of hunting. If you are the kind of guy that likes to move around a lot, I would leave it all standing. A little extra cover might be useful at times. If you sit in a blond and rarely move, I would cut it all down because it does help increase your field of view and gives you an easier shot. Turkeys will find the food source no matter if it is still standing or on the ground.

I'd mow some paths in it leading to the area I will be hunting. Maybe some paths along tree/fence lines so they can see my decoys from a distance.

Sometimes it is nice to be able to see them coming from a distance, but that also means they can see you. I would allow them some cover until they get into range.

My plots are rather small and tucked into wooded areas ..... ranging from about .5 acres to about 4 acres in size. All of these fields have a mix including a lot of different clovers, wheat, oats, grain rye and some have turnips planted in them. The deer down this way are still hitting the plots but with the new growth shoots popping out everywhere now, they have moved to the tender browse as well. Some of the larger fields are essentially far out growing the browsing deer. A few were already 2' high in places.

I mow most of mine down, setting the cutter to clip off above the young clover that has been popping up lately. That leaves them about 6" tall. I then run a disk harrow around the edges of a few of the ones where turkeys have frequented in past years, creating a 30 foot or so wide "dirt" edge. Some fields, I will leave strips along the edge untouched. In fact that is what I did some of this past week.

I have found that turkey do not care to come out in high grassy fields, but hens will sometimes nest in high think grass, up against a bank or near a tree line.