A very nice study of the old plow... I would have thought though that using colour in this case will show the rust in a stronger way. In any case, I like how you photographed it.
Also I have to say the OOF rendering of the X-vario lens is beautiful.
Thank You! You are right, the rust doesn't shine in b&w's... I also agree about the OOF rendering, it is among the best I have experienced even if the lens operates at smaller minimum aperture.
Here is the color version and somehow I didn't like, maybe because the background is in the same tonality. A white balance thing, even if there was old leaves on the ground?