... small stones.Plant roots can cross the meantime, can grow comfortable,neat, balanced, grow into the turf mat, turf, soil, surface ... / s).6. Permanent alternative to concrete, asphalt, stone and other slope protection material for roads, railways, rivers, dams, slopes ... .8.Laying on the surface of the sandy soil, prevent the move of the sand dunes, greatly improve the surface roughness, increasethe ...