The present disclosure refers to a method for controlling operation of an agricultural system, comprising a tractor； an implement (100) hitched through a draw bar (10) to the tractor, the implement (100) having working tools (31) configured to engage with a ground and/or an agricultural product in operation while the tractor is drawing the implement (100) over a field； and a control system, comprising a control unit (2) and a sensor arrangement (1) connected to the control unit (2) through a control bus (5), wherein the control unit (2) is configured to determine a draft force applied to the implement (100) through the draw bar from measurement signals detected by the sensor arrangement (1)； the method comprising operating the implement in either normal mode or field transport mode of operation based on different draft force thresholds.
