Abstract: A device for wrapping bales of agricultural produce such as bales of hay, straw or green crop with a film. The bales are completely wrapped with the film and are marked to set forth the quality of the bale as silage and with further information. The information may include the amount of film used to wrap the bale and thus the number of wrapping layers, and the name of the person responsible for wrapping the bale. Electronic devices may be applied to the wrapping film for ascertaining the location of the bale after it has been wrapped by GPS or DGPS. The information can be imprinted directly on the film used for wrapping the bale or on labels applied to the film.