Wonderful work yet again!
Very lifelike. Is your farm even a farm without a scene like this somewhere on your compound?
I swear they're ubiquitous here in central Germany. It seems farmers are required by law to have a scene like this or risk losing grants/subsidies. Some dilapidated old shack with pieces of equipment that no one has bothered to move for dozens of years. Usually thickly overgrown with stinging nettle.
Seeing the tractor without the rear tires and the axle exposed that way.... half-track conversion? A bogey like on an M2/M3 half-track, converted in such a way that it could be powered by the regular drive-train. You see some modern versions from time to time, but maybe on an older tractor?
EDIT: Looks like they had the same thought before (damn, why do I only have the good ideas after someone else has had them?).
A Deutz F1L514 51 tractor with a Hülle Ansteckraupe. Hülle seems to be the name of the manufacturer. Ansteckraupe translates to "attaching/detachable track drive". Apparently this sort of track was commercially available and not just a home-brew one-off.
The track links look very familiar. Panzer II?