Identify this modern day agricultural machine How does it help?

1. This modern day agricultural machine is a disc harrow which is a type of harrow with a row of concave metal discs along its cutting edges. These discs can have scallops or be positioned at an angle. It is a tool for farming that is used to till the ground before planting crops. 2. Primary heavy-duty disc harrows are typically employed to plough up undeveloped land, remove debris, and mix it into the topsoil. Lighter secondary disc harrows aid in fully incorporating the residue left behind by a primary disc harrow, getting rid of clumps, and releasing the remaining compacted soil. The stover, such as cornstalks, left behind from previous crops is chopped up by the notched disc blades. Prior to ploughing, disc harrows are also frequently employed to prepare the ground for later management and use.