... covers, it can be done biodegrade stadily once ploughed into the soil afte use. Agriculture mulch films ,silage covers are used ... .3. Clear color ,or black color, or white/silver colors with UV protection.4. Normal size: 0.5m-6m width, 10 ... thickness., length is unlimited. agriculture mulch films ,perforated mulch film (with 2 or 4 holes)