I like the idea. Tractor's position, colors, and composition are perfect.
I am less thrilled with strong vignetting, as it cuts into the rightmost silo unnaturally. I hope there is more space to the right, in which case you can use it for vignetting, while leaving the silo relatively untouched. It would also allow for some breathing space (overall composition feels a bit cramped). There is a strong white halo along said silo as well. I would also bring back some color to the sky; not much though.
