Abstract: An apparatus for supplying reinforcing additive to a ground by being connected to a mobile vehicle including a chamber to store the reinforcing additive, wherein the chamber includes an outlet to let the stored additive reach the ground for reinforcement; a connecting element to connect the apparatus to the vehicle; a cover for adjusting the additive amount leaving the chamber through the outlet by adjusting the opening of the outlet; a movement element in connection with the cover and moving the cover to adjust the opening of the outlet; a vibrating element provided on a surface of the chamber, vibrating the surface when energized to direct the additive towards the outlet; and a power source in connection with the movement element and vibrating element, providing energy to these elements to perform their operations according to the demand of the related application.