When we use to grow big gardens, we used a middle buster, that was usually drawn by a team of mules, but we pulled it with a tractor, to dig potatoes. Turning them up with that middle buster was a whole lot easier than digging by hand.
We hooked a chain to the drawbar on the lift arms. Since a middle buster throws soil to both sides, it was easy to control the depth with the lift arms.
Someone modified mine so I can use it on the 3 point hitch
