Sod Calculator

Sod, or turf in British usage, is mature grass harvested with a thin layer of soil and root held together by rhizomes, stolons or an added netting, and it is bought by area rather than by volume. The base quantity is simply length times width, but every real installation needs a waste allowance: 5 percent is adequate for a plain rectangle, while 10 to 15 percent is realistic for curved beds, tree rings and irregular boundaries, because each cut piece leaves an offcut too small to use. Handling units are fairly standardized in North America. An individual slab is commonly 16 by 24 inches, or 2.67 square feet, and a pallet covers roughly 450 to 500 square feet, though 600 square foot pallets are sold in some regions. Large rolls of 10 square feet and up are used on sports fields and by contractors with mechanical layers. Sod is cut thin, generally half an inch to one inch of soil, because a thinner slab knits to the underlying grade faster even though it dries out sooner. That is also why delivery timing is critical: a stacked pallet begins to respire and heat, and turf left banded for more than 24 to 48 hours in warm weather can arrive yellow or dead. Weight is the other constraint, since a pallet runs roughly 1,500 to 3,000 pounds depending on soil thickness and moisture, which limits where a truck can unload. One caveat applies to the soil preparation figure. Spreading topsoil 2 inches deep over 1,000 square feet actually requires about 6 cubic yards, so the 4 cubic yard allowance used here corresponds to a layer closer to 1.3 inches and should be scaled up if a full 2 inch amendment is intended. Prices and labour rates are regional estimates only.

Transplanting cut turf is old practice, used for centuries to repair bowling greens, lawns and earthworks, but it was manual, slow and confined to short distances. Commercial sod production as an industry depended on two things arriving together in the mid twentieth century: mechanical harvesters that could cut, roll and stack uniform slabs, and improved seed of species that would hold a slab intact. Kentucky bluegrass became the foundation of the northern sod trade precisely because its rhizomes bind a thin cut of soil into a piece that can be lifted and handled; bunch-forming fescues and ryegrasses generally require plastic netting laid under the crop, and warm-season species such as Bermuda and zoysia are held together by stolons. The scientific base came largely from golf. The United States Golf Association established its Green Section in 1920 and worked in cooperation with the United States Department of Agriculture on turfgrass selection, soils and disease, and the land-grant universities built turf research programmes that later served the sod growers. Producers organized formally when the American Sod Producers Association was founded in 1967; it was renamed Turfgrass Producers International in the 1990s and standardized much of the grading and handling practice now taken for granted. Big-roll harvesting equipment spread through the 1970s and 1980s, and sand-based and washed sod, in which the field soil is removed so the turf can be laid on a specified rootzone, was developed for stadiums and putting greens where soil layering would otherwise impede drainage.