. BIA forest lands of North and South Dakota, 1996 [microform]. Forests and forestry North Dakota; Forests and forerstry South Dakota; Indian reservations North Dakota; Indian reservations South Dakota. Figure 2.—Percent of area by forest type, South Dakota BIA, 1996. Oak-Hickory The oak-hickory forest type occupied thousand acres or 33 percent of the total BIA timberlands in North Dakota and thousand acres or 23 percent of the total BIA timberlands in South Dakota. Because bur oak is the only native oak species found in North and South Dakota, the local type is called bur oak. Speci
. BIA forest lands of North and South Dakota, 1996 [microform]. Forests and forestry North Dakota; Forests and forerstry South Dakota; Indian reservations North Dakota; Indian reservations South Dakota. Figure 2.—Percent of area by forest type, South Dakota BIA, 1996. Oak-Hickory The oak-hickory forest type occupied thousand acres or 33 percent of the total BIA timberlands in North Dakota and thousand acres or 23 percent of the total BIA timberlands in South Dakota. Because bur oak is the only native oak species found in North and South Dakota, the local type is called bur oak. Species commonly associated with the bur oak forest type in North and South Dakota are basswood and green ash. Elm-Ash-Locust In the most recent inventory, the elm-ash- locust forest type occupied thousand acres or 9 percent of the total BIA timberlands in North Dakota and thousand acres or 14 percent of total BIA timberlands in South Dakota. The local forest type is called elm-ash, an upland forest type dominated by American elm and green ash. Aspen-Birch The aspen-birch forest type occupied thousand acres or 58 percent of the total BIA timberlands in North Dakota. The entire State of North Dakota has thousand acres of aspen-birch forest type, which means that 19 percent of all aspen-birch forest land in the entire State is found on North Dakota BIA timberlands. Elm-Ash-Cottonwood The elm-ash-cottonwood forest type, a lowland forest type, occupied thousand acres or 12 percent of the total BIA timberlands in South Dakota. The elm-ash-cottonwood forest type can be broken down into three local forest type groups, which are cottonwood ( thousand acres), elm-ash-cottonwood ( thousand acres), and willow ( thousand acres). A major forestry concern in the Plains States is the lack of cottonwood regeneration. Two major factors contributing to this problem are the construction of flood control dams on major rivers and streams and the grazing of livestock i
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