Nothing seems sharp. The tractory thing is suffering mostion blur, the extreme foreground is OOF from too shallow a DOF or perhaps the focus is too far back in the scene. i really don't like the crop at the top.
Your dirt color is a little too orange for my taste. Did you take this with a Nikon Coolpix? They tend to exagerate the reds. I would have gone for a wider crop including the guy on the tractor as well.
Unique subject and approach to the challenge theme. Like the color. Wish you had selected either a faster shutter speed to freeze the movement, or a slower shutter to make it very evident. Best of luck to you in the challenge.
I like the idea - a good unique take on the challenge. Why did you cut off the top of the tractor though? That makes the image feel like something is missing: 6