Both of these attachments, because of their design, are able to dig easily into all types of soil, breaking up new sod, loosening hardpan, and even loosening dirt that is filled with rocks.
As it digs through the soil, it discharges the soil to either the right or left side. People are often surprised that it can loosen and discharge very large rocks, making them visible to where you can remove them by hand.
While building a garden bed here in Texas, with a BCS tractor, the rotary plow loosened the 45 pound rock shown below.
While the rotary plow can handle all sorts of soil, it’s not invincible. To reduce stress on the equipment, we do recommend first removing any large rocks that you see before operating in. And avoid using it into areas that are mostly rock, with little or no soil.