Disclosed herein is a method of producing a silage cover, comprising co-extruding at least an inner first layer being a single- or multi-ply plastic film having oxygen permeability according to DIN 53380-3 at 23 ºC and 50 % relative humidity of no more than 500 cm³ / (m² d bar) and a water vapor transmission rate according to ISO 15106-3 at 23 °C and 85 % relative humidity of at least 5 g / m² d), and wherein at least one ply in total contains at least 50 % by weight of one or more materials from the group comprising polyamide, copolyamide, polyester, copolyester, polyethylene vinyl alcohol, polyvinyl alcohol and mixtures thereof； and a further second layer which contains at least 70 % by weight of materials from the group comprising polyethylene, polypropylene, copolymers of ethylene and other vinyl monomers, and copolymers made of propylene and other vinyl monomers, wherein the silage cover has low adhesive bonding between the layers, such that the second layer is separate from the first layer, easy to separate therefrom, or self separating on the silage.
