If you have a Real tractor (one that could crush your foot), I recommend steel toed work boots with a slight, hard heel. You need the toes and heel to do some kicking when hooking up implements and rolling the machine or attachment whe hooking them up. Also when you might drop something on it (like the tongue of a trailer, or something else heavy and awkward. By all means something waterproof and loose enough to pull off if you get caught in or by something and you don't want to lose a leg or foot in the deal.
Now, what kind a neck ties do you fellers wear? String, bow, narrow, wide, tye dyed, silk, cotton or bolo?