Method for operating an agricultural system having - a tractor; - a plough hitched to the tractor through a hitch mechanism; - working tools received on a frame of the plough; - a depth control wheel adjustable in height relative to the frame; - a top link connected to the frame for lifting the frame; and - a control system provided on at least one of the tractor and the plough; the method comprising - operating the plough in a normal mode of operation while the plough is moved by the tractor over the field, the working tools of the plough being engaged with the soil in the normal mode of operation; - providing a request signal in the control system, the request signal indicating a request for starting a headland control mode of operation; and - in response to the request signal, starting the headland control mode of operation comprising: - providing control signals in the control system, the control signals defining a sequence of positions for both the top link and the depth control wheel, wherein the sequence of positions comprises positions assigned to an intermediate plough working position in which some of the working tools are disengaged from the soil and a transport plough position in which all working tools are disengaged from the soil, wherein the providing of the control signals, in the control system, comprises receiving control information about a pre-defined sequence of positions and generating the control signals according to the information about the pre-defined sequence of positions; and - operating the top link and the depth control wheel according to the control signals while the tractor with the plough is arriving at the headland, moving through the headland and leaving the headland. - a tractor; - a plough hitched to the tractor through a hitch mechanism; - working tools received on a frame of the plough; - a depth control wheel adjustable in height relative to the frame; - a top link connected to the frame for lifting the frame; and - a control system provided on at least one of the tractor and the plough; the method comprising - operating the plough in a normal mode of operation while the plough is moved by the tractor over the field, the working tools of the plough being engaged with the soil in the normal mode of operation; - providing a request signal in the control system, the request signal indicating a request for starting a headland control mode of operation; and - in response to the request signal, starting the headland control mode of operation comprising: - providing control signals in the control system, the control signals defining a sequence of positions for both the top link and the depth control wheel, wherein the sequence of positions comprises positions assigned to an intermediate plough working position in which some of the working tools are disengaged from the soil and a transport plough position in which all working tools are disengaged from the soil, wherein the providing of the control signals, in the control system, comprises receiving control information about a pre-defined sequence of positions and generating the control signals according to the information about the pre-defined sequence of positions; and - operating the top link and the depth control wheel according to the control signals while the tractor with the plough is arriving at the headland, moving through the headland and leaving the headland. - providing control signals in the control system, the control signals defining a sequence of positions for both the top link and the depth control wheel, wherein the sequence of positions comprises positions assigned to an intermediate plough working position in which some of the working tools are disengaged from the soil and a transport plough position in which all working tools are disengaged from the soil, wherein the providing of the control signals, in the control system, comprises receiving control information about a pre-defined sequence of positions and generating the control signals according to the information about the pre-defined sequence of positions; and - operating the top link and the depth control wheel according to the control signals while the tractor with the plough is arriving at the headland, moving through the headland and leaving the headland.