Two methods of potato digging.
On the left, tractor and blade. Upside: digs them right up. Downside: and buries them in the dug dirt, so you have to dig them up again.
On the right, potato fork and pick them up. Upside: whack just past the plant stem and the potatoes fly out of the ground. Downside: is more work whacking than driving the tractor, but still way less than redigging them out of the dug dirt.