Patent ID: 7108075

Claim:
A method of tilling soil comprising: (a) pulling a seedbed preparation implement in a draft direction; (b) during the step (a), plowing the soil using a plurality of plow shanks mounted on a mainframe of said seedbed preparation implement; (c) during the step (a), cutting and turning the soil using a plurality of rotating discs of a disc gang supported by a main beam, said main beam being pivotally connected with respect to said mainframe, said discs rotating about a common axis that extends at a gang angle relative to a perpendicular to said draft direction, and adjusting said gang angle by moving said disc gang relative to said mainframe, the adjustment being infinite through a designated range of at least 3°, the adjusting step further comprising actuating an actuator extending wholly between said main beam and said mainframe, wherein the adjusting step comprises: i. pivoting a location on said main beam about a vertical axis; and ii. sliding a pin in an elongated slot on said mainframe, said pin disposed at a location positioned laterally outwardly from said first pivoting location relative to an axis extending centrally and longitudinally through said mainframe along said draft direction.