The present disclosure refers to a boom mounting assembly for attachment to an agricultural machine, comprising a primary frame (12)； and a boom support frame (1) configured to support a boom (10) and suspended from the primary frame (12) such that the boom support frame (1) can pivot in a transverse plane around a longitudinal axis of rotation provided in a pivot point. The boom support frame (1) comprises a first sub-frame (2) connecting to the primary frame (12)； a second sub-frame (3) supported by the first sub-frame (2) in support sections provided, in a transverse direction, on opposite sides of the pivot point； and an actuator (7) connecting to the first (2) and second (3) sub-frames and operable such that the support sections can be moved relative to the pivot point, thereby, in a transverse direction increasing a distance between the pivot point and a support section on one side of the pivot point and, at the same time, decreasing a distance between the pivot point and a support section on an opposite side of the pivot point and vice versa. Further, a method for controlling operation of a boom mounting assembly attached to an agricultural machine is provided.
