You could pull just about anything with a horse in a full collar with traces onto a swingle tree, but it would have to be on fairly level ground, particularly if the load was wheeled, as it would run into the back of the horse when going downhill.

The description 'farm cart' has me thinking this would be a two-wheeled vehicle. It would be impossible to balance and pull such a vehicle without shafts to the driving saddle.
If it was a four-wheeled vehicle, it would involved weight loads to some extent, which would have to involve brakes and bods to apply them.

Either would be very unsafe things to try even before H&S.
I don't suppose we could see a pic of this object, could we? I've just bought a new hat...I would hate to have to eat it.
