Grass Monoculture

Several areas in the Arb are planted monocultures of perennial grasses, particularly brome (Bromus inermis) and switchgrass (Panicum virgatum). The largest areas are the old fields in the Upper Arb along Spring Creek Road and a Lower Arb field near Highway 19. Because these grasses are highly competitive and form a thick sod, few plants can invade these areas and they will remain monocultures for many decades. These fields will be converted to appropriate native communities as the surrounding areas are restored to natural communities.