Sod is the top layer of ground covered in grass. This is also known as turf. Sod is used in many homes as the ground cover for yards, often referred to as lawn. Sod can be planted from grass seed and requires coverage while it grows in the form of straw, but sod also can be purchased in segments or rolls to place on top of the ground. Such sod is grown on sod farms. According the to the USDA, there are over 1,400 sod farms in the United State with over 368k acres in sod production.
Common grasses used for sod include:
Common Sod Units: Sod comes in several different standard units including: