A hydraulic braking system for farm vehicles or the like, including: - an anti-lock braking device, which is fed by a first fluidic circuit containing a first fluid and is arranged to manage safety functions and ancillary functions based on interventions on braking members of the vehicle, the ancillary functions including at least a steer-by-braking function; - rear brakes (17, 20) and front brakes (18, 19) fed by a second fluidic circuit containing a second fluid incompatible with said first fluid; - bi-fluidic relays (35, 36, 37, 38) connected between the anti-lock braking device and the brakes (17, 18, 19, 20) and configured for hydraulically separating said first fluidic circuit from said second fluidic circuit; the system being characterised in that: - the vehicle has a first and a second braking pedal (13, 14) connected to a first and a second master cylinder (15, 16), respectively, each cylinder being configured for actuating braking by means of a front brake (18, 19) and/or a rear brake (17, 20) of the vehicle; - the anti-lock braking device is configured for individually controlling and monitoring the vehicle brakes (17, 18, 19, 20) in order to perform said safety functions and ancillary functions; - each one of said master cylinders (15, 16) has a first brake actuation circuit (28, 29) connected with a section of the anti-lock braking device intended for controlling a respective rear brake (17, 20), and a second brake actuation circuit (25, 26) connected with a respective inlet of a logic head with two inlets and one outlet, where the outlet is connected with a section of the anti-lock braking device intended for controlling the front brakes (18, 19); and - the anti-lock braking device is associated with a selector operable by a user of the vehicle for turning on or off the anti-lock braking device at least during steer-by-braking. - an anti-lock braking device, which is fed by a first fluidic circuit containing a first fluid and is arranged to manage safety functions and ancillary functions based on interventions on braking members of the vehicle, the ancillary functions including at least a steer-by-braking function; - rear brakes (17, 20) and front brakes (18, 19) fed by a second fluidic circuit containing a second fluid incompatible with said first fluid; - bi-fluidic relays (35, 36, 37, 38) connected between the anti-lock braking device and the brakes (17, 18, 19, 20) and configured for hydraulically separating said first fluidic circuit from said second fluidic circuit; - the vehicle has a first and a second braking pedal (13, 14) connected to a first and a second master cylinder (15, 16), respectively, each cylinder being configured for actuating braking by means of a front brake (18, 19) and/or a rear brake (17, 20) of the vehicle; - the anti-lock braking device is configured for individually controlling and monitoring the vehicle brakes (17, 18, 19, 20) in order to perform said safety functions and ancillary functions; - each one of said master cylinders (15, 16) has a first brake actuation circuit (28, 29) connected with a section of the anti-lock braking device intended for controlling a respective rear brake (17, 20), and a second brake actuation circuit (25, 26) connected with a respective inlet of a logic head with two inlets and one outlet, where the outlet is connected with a section of the anti-lock braking device intended for controlling the front brakes (18, 19); and - the anti-lock braking device is associated with a selector operable by a user of the vehicle for turning on or off the anti-lock braking device at least during steer-by-braking.