Straw Screen for Covering Mushroom Bed Small 320×131 Medium 640×262 Large 1024×419 Download TIFF Original 2400×983 | (735.5 KB) Description Straw screens are excellent movable coverings. The straw screens preserve an equable temperature. Keywords mushroom, mushroom bed, straw screen for covering mushroom bed Galleries Miscellaneous Agriculture Source: Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)