I have the Fergeson with 11 or 12 shanks. It works good for row cropping when the plants are low growning, like beets. The way I use it, set the wheels on tractor close 48 or 52 inches and put a large sweep behind each rear tire. Also, you space the rows at or close to the width of the tires, so the arrangement of the rows fits the tractor/cultivator.
Now, this only works for plants that fit under the tractor, because it is setup to straddle a row. It works really slick. It is also possible to set the wheels very wide and straddle two rows, using sweeps behind each rear tire and one sweep in the middle. You do the math. Row spacing needs to be precise.
The other setup is for driving between rows, for tomatoes and stuff that you can't straddle with the tractor. There are other uses, like preparing for planting, etc, etc.