Abstract: A dry material and chemical impregnation unit for mixing the dry material and chemicals separately from a mixing and delivery system prior to delivering the mixture to a delivery unit. The impregnating unit can include a set of rotating mixing blades upon which the material, such as fertilizer and chemicals impinge. The impregnating unit also can include inclined walls upon which the dry materials or a dry and liquid material, such as the fertilizer and chemicals can impinge prior to or after passing through the mixing blades. The impregnating unit further can include a baffle upon which the dry material and chemicals impinge and pass therefrom to further inclined walls forming a restricted opening to turbulently mix the materials and chemicals, with or without the mixing blade.