Clear film: readily punctured by nutsedges when PAR was limited; Purple nutsedge (78%) more effective in puncturing clear mulch than yellow nutsedge (43%) (Chase et al. 1998). <BR> <BR> <BR> <BR> <BR>Clear plastic allows weeds to grow, foliage pushes up the mulch 10 to 20 cm. (Majek and Neary 1991).<BR>