Notched blades enhance the ability of the tool to slice through plants and plant residue and make the implement more aggressive.
Some commercial vegetable growers bed up their fields in the off season and plant a cover crop such as peas or soybeans on the beds, then come in before planting their main crop and split the beds open with a disk bedder, burying the cover crop in the old middles under the new beds. The primary challenge in using a disk bedder is getting straight beds at the proper spacings. With larger tractors, multi-row bedders ensure proper spacing between beds; with a one-row bedder, it is all up to the driver. In some cases, it is best to make one light pass to lay out the beds, then a second, deeper pass to attain the desired bed height.