Abstract: An applicator mechanism is used in combination with a land vehicle and a source of fluid treatment substance to introduce the substance into a turf surface so that the turf surface is treated by the chemical. The applicator mechanism includes a frame mountable to the land vehicle. The frame is movably supported by gauge wheels and gauge rollers above the turf surface such as the frame is capable of being driven across the turf surface by the vehicle. At least one applicator unit is swivelably attached to and depends from the frame. The unit includes a sled slidably engaged in the turf surface and at least one coulter mounted axially rotatably to the sled and having a cutting edge that extends below the sled for engaging and cutting the turf surface. A chemical dispensing device is mounted to the sled rearwardly of the coulter and extends below the sled.