National Forest System

National Forest System,

federally owned reserves, c.191 million acres (77.4 million hectares), administered by the Forest Service of the U.S. Dept. of Agriculture. The system is made up of 155 national forests and 19 national grasslands in 41 states and Puerto Rico. The majority of reserves are found in the Western states, with Alaska, Idaho, and California having the most extensive holdings. In the East, large national forests are in the Green, White, Allegheny, and Blue Ridge mts. The national grasslands are found on the Great Plains. By law the reserves must be used for timber production, watershed land, wildlife preservation, livestock grazing, mining, and recreation. In 1891, Congress authorized the president to set aside forest reserves; Yellowstone Park Timber Reserve (now Shoshone National Forest) in Wyoming was the first (1891) to be established. The forest reserves were administered by the General Land Office of the Dept. of the Interior until 1905, when they were transferred to the Forest Service by President Teddy Roosevelt. They were designated national forests in 1907. In the late 20th cent., there was increasing pressure from environmental protection groups to change the main emphasis of forest management from the promotion of logging and road-building to the protection of timber reserves. Conflict between environmentalists and business interests over the issue has been heated. Moving to conserve some forest resources, in 1999 the government declared a moratorium on logging and roadbuilding in the undeveloped back country of the national forests. See forestforest,
a dense growth of trees, together with other plants, covering a large area of land. The science concerned with the study, preservation, and management of forests is forestry.
..... Click the link for more information. .

Bibliography

See R. S. Gilmour, Policy Making for the National Forests (1971); G. A. Bradley, ed., Land Use and Forest Resources in a Changing Environment (1984); publications of the Forest Service, U.S. Dept. of Agriculture, and the American Tree Association, Washington, D.C.

单词	national forest system
释义	National Forest System National Forest System, federally owned reserves, c.191 million acres (77.4 million hectares), administered by the Forest Service of the U.S. Dept. of Agriculture. The system is made up of 155 national forests and 19 national grasslands in 41 states and Puerto Rico. The majority of reserves are found in the Western states, with Alaska, Idaho, and California having the most extensive holdings. In the East, large national forests are in the Green, White, Allegheny, and Blue Ridge mts. The national grasslands are found on the Great Plains. By law the reserves must be used for timber production, watershed land, wildlife preservation, livestock grazing, mining, and recreation. In 1891, Congress authorized the president to set aside forest reserves; Yellowstone Park Timber Reserve (now Shoshone National Forest) in Wyoming was the first (1891) to be established. The forest reserves were administered by the General Land Office of the Dept. of the Interior until 1905, when they were transferred to the Forest Service by President Teddy Roosevelt. They were designated national forests in 1907. In the late 20th cent., there was increasing pressure from environmental protection groups to change the main emphasis of forest management from the promotion of logging and road-building to the protection of timber reserves. Conflict between environmentalists and business interests over the issue has been heated. Moving to conserve some forest resources, in 1999 the government declared a moratorium on logging and roadbuilding in the undeveloped back country of the national forests. See forestforest, a dense growth of trees, together with other plants, covering a large area of land. The science concerned with the study, preservation, and management of forests is forestry. ..... Click the link for more information. . Bibliography See R. S. Gilmour, Policy Making for the National Forests (1971); G. A. Bradley, ed., Land Use and Forest Resources in a Changing Environment (1984); publications of the Forest Service, U.S. Dept. of Agriculture, and the American Tree Association, Washington, D.C.
随便看	block wavelet transform block-weighted distortion estimate block windowing scheduling block wiring diagram blockwise-adaptive chosen-plaintext attack blockwise concatenated convolutional code blockwise direct sum block-wise fast fading blockwise partitioned convolutional code blockwork block write mode block-write mode blocky blocky (chalk zone) blocky iceberg block you in block you up blocky pixels blocky's funny doings international bloco bloc obrer i camperol bloco de esquerda bloc of communists and non-party members bloc opératoire bloc, parliamentary