A ground opener assembly mountable to a tool bar of a seeder for depositing a at least one product into the ground is provided, comprising: a first member having a proximal end and a distal end, the proximal end of the first member pivotably attached to the tool bar a second member having a proximal end and a distal end, said proximal end being pivotably attached to the distal end of the first member a first arm having one end attached at or near the proximal end of the second member and a second arm having one end attached at or near the distal end of the second member, whereby the second member, first arm and second arm operate as a single unit a first opener attached at or near the proximal end of the second member for forming a furrow into the ground and depositing a first product therein a second opener attached at or near the distal end of the second member for forming a furrow into the ground and depositing a second product therein a front gauging device attached to the free end of the first arm and a back gauging device attached to the free end of the second arm and a biasing device operative to exert a downward bias force on the second member, the first and second openers, and the front and back gauging devices,
