To provide a sheet suitable for the manufacture of silage by connecting the periphery of a sheet body constituted of a lower sheet composed of a plastic film and an upper sheet by a connection part constituted of point adhesion.

The connection part 1D is formed in a state parallel to respective sides at slightly inner positions from the front, back, left and right sides of the sheet body 1C constituted of the lower sheet 1A composed of a thin soft plastic film and the upper sheet 1B composed by laminating plastic on flat yarn fabric laminated on the upper surface of the lower sheet 1A. Thus, the lower sheet 1A and the upper sheet 1B are integrated, heat seal 1D1 is executed to the connection part 1D with a prescribed interval and this sheet is obtained.