The invention includes a towable device for treating and maintaining turf, which includes at least one roller and manifold assembly that further includes at least one injection head for directing periodic jets of liquid and at least one additive material into the ground, where the at least one injection head creates a discharge pattern greater than 30 inches in width. Also included is a liquid supply system for supplying pressurized liquid to the at least one injection head, an additive supply system for introducing the at least one additive material to the liquid within the at least one injection head, and a control system for controlling discharge from the at least one injection head. Additionally, the invention includes a method of treating and maintaining turf.