Ventilated elongated sheet with welded cover configured to cover cultivated plants

An elongated sheet configured to provide a covered area for agricultural cultivated plants comprising:

• a basic film of plastic,
• wherein a ventilation area extending in a longitudinal sheet direction and having a plurality of ventilation openings is provided in a central area of the basic film,
• wherein a cover film of plastic extending in the longitudinal sheet direction of the basic film is applied to the ventilation area, forming free spaces for air exchange, the cover film welded to the basic film over a plurality of connection areas following one another in the longitudinal sheet direction,
• wherein at least a portion of the plurality of the connection areas are angled with an offset from a weld start point to a weld end point relative to a direction extending orthogonally to the longitudinal sheet direction, the at least the portion of the plurality of connection areas are configured to improve one or more of ventilation and deaeration of the covered area, and
• wherein:
• the weld start point is connected to the weld end point via a welding, and the welding includes a first welding line and a second, different welding line, and the first and the second welding lines form a V-shape, or
• at least one connection area of the plurality of connection areas includes at least one further welding extending orthogonally to the longitudinal sheet direction, wherein the further welding is arranged between two neighbouring ventilation sections is at least substantially straight, and wherein a Y-shaped formation is made by the further welding.