The present invention relates to an agricultural film which integrally forms a reference line which is easy to produce and which can be clearly distinguished by forming an identification line for identifying the center so as to be able to accurately cover the sash for sowing when used in a farmhouse, A blower film extrusion molding machine for producing a film in the form of a tube by melting the supplied raw material； and a film produced in a tubular form in the blower film extrusion molding machine as A A folding section for folding both ends of the film on the sheet in the sheet bundle, and a cutting section for cutting both ends of the film on the sheet in the sheet bundle, And a separating unit for separating the seedling-pierced film from the seeding air into two sheets, As those in the agricultural film production apparatus constituted by windings wound onto the separated film in the group separation section each roll, each color to constitute the raw material supply to at least two or more of a plurality of groups to supply the other raw materials at the same time； The extrusion molding machine includes a molten portion for melting the raw material, an extrusion portion for extruding the molten raw material, a molding portion for molding the extruded raw material into a cylindrical film, And an outer shape balancing part for enclosing the outer surface of the molded film and injecting air to the outer surface to cool the outer shape of the film and to stably hold the outer shape of the film. Wherein the extruding portion is constituted by an extruding hole communicating each of the raw material feeder and the forming portion, and each of the extruding holes is selectively closed by a sealing bolt； And the adjustment pin is integrally formed at the end of the adjustment bolt so that the adjustment pin is formed integrally with the extrusion hole, To facilitate fine opening； Wherein each of the sowing and sowing air is constituted by a separate motor at each s
