I suspect may will find the treatment of this extreme, but it seems to me (aside from what looks like over-done sharpening) very close the sense of a genuinely old print. If only the image itself were of something a bit more engaging, a bit more ... human?
This is a little too heavy on the yellow for my taste. Adding some red would give this a more brownish tint witch would make it look more like an antique photograph.
Interesting old tractor and nice use of sepia but your image looks a little soft or out of focus. This might be intentional but the jagged fine lines are distracting. With pixel limitations on these challenges fine lines and edges can be difficult.