A secondary air seeder assembly for depositing seed along the tire tracks formed by an air seeder cart and system comprising the same is provided. The secondary air seeder assembly includes includes first and second elongated and parallel main frame members, each having a terminal forward end and a terminal down turned rearward end. First and second elongated and parallel transverse frame members are connected to and extend between the first and the second main frame members at a longitudinal spaced distance from one another. Two forward caster wheels, one is connected at each terminal forward end of the first and the second main frame members. Two rearward wheels, one is connected at each terminal down turned rearward end of the first and the second main frame members. First and second elongated coupling frame members, are each connected at first end thereof to the first transverse frame member at a spaced distance and connected together at a second end thereof forming a hitch point. A hitch is located at the hitch point. One or more dry material applicator assemblies are connected to the second transverse frame member between the first and the second main frame members. One or more dry material applicator assemblies connected to the first transverse frame member between the first and the second main frame members.
