Attached is a picture of my soil ripper, which has 7 "subsoiler" type little chisel plows on it. They're available now from King Kutter and others and are usually called "cultivators".
Some people use potato plows to make raised rows. I put opposed 20" discs onto the diamond bar that carries my soil ripper plows to do this. You can buy a rig called a Keulavator from Agri Supply that'll carry either 2 potato plows or 2 "disc hillers" like mine. The second pic attached shows my disc hillers.
The plows used to turn soil come in 3 types: 1) moldboard, which is a shaped plow share with a sharp point on it at ground level; 2) big discs to toss the soil aside (like if I had my disc hillers both turning the same direction, but with a trail wheel to hold them in place in a furrow); 3) a rotary plow, available to BCS and Gravely tractor users. I've used all 3 of these at various times in my life. They're typically only used on new ground with grass/weeds covering it, to turn over the vegetation. They're also used if you grow cover crops. These plows yield a very "rough" ground and are typically used in the fall or immediately followed by a multi-disc rig and harrow to smooth the ground. If done in the fall and left to sit, weather often smooths the ground enough to use only a harrow or cultivator type rig to prepare the ground for seeding.
Ralph