Courtesy A. J. Turgeon
Turfgrasses are plants that form a more or less continuous ground cover that persists under regular mowing and traffic. An interconnecting community of turfgrasses and the soil adhering to their roots and other belowground organs form a turf. The terms turf and turfgrass are thus different in that one refers only to the plant community while the other represents a higher level of ecological organization by including a portion of the medium in which the turfgrasses are growing. When the surface layer of a turf is harvested for transplanting, it is called sod.