Profile: Doyle Equipment Mfg. Co. manufactures fertilizer equipments. We specialize in the production of bulk blenders for dry fertilizer. We offer paddle blenders, plant conveyors, under car conveyors and field loader conveyors. Our vertical aager blender uses one taper screw mix auger, both to pull the fertilizer into the blender tank & mix it. Our augers are solid welded on both sides and have a continuous taper for smoother and gentler blending.