A system (100, 200) for controlling the supply of hydraulic fluid to an implement of a work vehicle, the implement including a hydraulic cylinder having a first chamber and a second chamber, the system (100, 200, 300) comprising: - a pump configured to provide hydraulic fluid under pressure through a pump output line, said hydraulic fluid received via a pump input line from a tank; - a control valve in flow communication with the pump output line, the control valve being configured to regulate a supply of hydraulic fluid to the hydraulic cylinder; - a first fluid line provided in flow communication with a first output port of the control valve, the control valve being configured to supply hydraulic fluid through the first fluid line to the first chamber of the hydraulic cylinder for raising at least one ground-engaging component of the implement relative to the ground; - a second fluid line provided in flow communication with a second output port of the control valve, the control valve being configured to supply hydraulic fluid through the second fluid line to the second chamber of the hydraulic cylinder for lowering the at least one ground-engaging component relative to the ground; - a pressure control valve provided in flow communication with the second fluid line, the pressure control valve being configured to regulate a fluid pressure of the hydraulic fluid being supplied to the second chamber of the hydraulic cylinder; - a bypass fluid line configured to provide a flow path for hydraulic fluid between the pump and the second fluid line that is independent of the control valve; and - a load sensing line configured to provide an indication of the fluid pressure of the hydraulic fluid being supplied to the second chamber of the hydraulic cylinder from the pressure control valve, wherein, when hydraulic fluid is being supplied through the pressure control valve from the pump, operation of the pump is configured to be controlled based at least in part on the fluid pressure of the hydraulic fluid being supplied to the second chamber of the hydraulic cylinder characterized by having the control valve being configured to be moved to a float position where the supply of pressurized fluid directed through the control valve from the pump is cut-off, and the supply of fluid directed through the second fluid line to the second chamber of the hydraulic cylinder is derived from the bypass fluid line, and wherein in said float position the hydraulic fluid contained within the first chamber of each cylinder may be directed back through the control valve via the first fluid line to allow such fluid to be returned to the tank. - a pump configured to provide hydraulic fluid under pressure through a pump output line, said hydraulic fluid received via a pump input line from a tank; - a control valve in flow communication with the pump output line, the control valve being configured to regulate a supply of hydraulic fluid to the hydraulic cylinder; - a first fluid line provided in flow communication with a first output port of the control valve, the control valve being configured to supply hydraulic fluid through the first fluid line to the first chamber of the hydraulic cylinder for raising at least one ground-engaging component of the implement relative to the ground; - a second fluid line provided in flow communication with a second output port of the control valve, the control valve being configured to supply hydraulic fluid through the second fluid line to the second chamber of the hydraulic cylinder for lowering the at least one ground-engaging component relative to the ground; - a pressure control valve provided in flow communication with the second fluid line, the pressure control valve being configured to regulate a fluid pressure of the hydraulic fluid being supplied to the second chamber of the hydraulic cylinder; - a bypass fluid line configured to provide a flow path for hydraulic fluid between the pump and the second fluid line that is independent of the control valve; and - a load sensing line configured to provide an indication of the fluid pressure of the hydraulic fluid being supplied to the second chamber of the hydraulic cylinder from the pressure control valve,