South Dakota's forests 2005
Resour. Bull. NRS-35. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 96 p.
The first completed annual inventory of South Dakota's forests reports almost 1.7 million acres of forest land. Softwood forests make up 74 percent of the total forest land area; the ponderosa pine forest type by itself accounts for 69 percent of the total.
Piva, Ronald J.; Moser, W. Keith; Haugan, Douglas D.; Josten, Gregory J.; Brand, Gary J.; Butler, Brett J.; Crocker, Susan J.; Hansen, Mark H.; Meneguzzo, Dacia M.; Perry, Charles H.; Woodall, Christopher W. 2009. South Dakota's forests 2005. Resour. Bull. NRS-35. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 96 p. https://doi.org/10.2737/NRS-RB-35.