Actually I have seen this kind of thing done, only with another kind of vehicle. I believe they call them TRACTORS. You may have heard of them. All kidding aside, if your XJ came with the Massey-Ferguson option you should have no problem tilling the corn fields with it.
Ok now I'm done joking. You have low range and your Cherokee could pull a house down if you rig it properly and get enough traction. So why not ? Just be careful not to overload it weight wise as in down force or tongue weight. Just because they will pull a shiotload doesn't mean the springs will support it.