Not sure how much this is about the road vs. the field, and would like to see it a little sharper (sharpening should be the last thing you do after all your adjustments, including resize. You'd be amazed what a difference that makes to your shot. I like how the tractor is partially hidding behind the trees and the yellow wheel and the red attachment are poking through. Placement according to the rule of third (with the tractor on the right side and road in front of it to drive on) would've been even better.
Even though this is a John Deere tractor, I still like the photo (I work for Caterpillar :) - I REALLY wish there would have been a possibility of NOT having this tree in front of the tractor. I believe that the tree grabbed your camera's attention for the focus and left the tractor a littly shy of good sharp focus... Your photo concept is great and I love the theme... Good shot!