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National correspondents are officially nominated by their countries to compile and report information and data on their national forest resources. [7] FAO trains the national correspondents on how to compile country reports using commonly agreed-upon terms and definitions and a standardized reporting methodology.
In the United States, national forest is a classification of protected and managed federal lands that are largely forest and woodland areas. They are owned collectively by the American people through the federal government and managed by the United States Forest Service , a division of the United States Department of Agriculture .
Forest inventory is the systematic collection of data and forest information for assessment or analysis. An estimate of the value and possible uses of timber is an important part of the broader information required to sustain ecosystems .
National forests listed in this column in small text are constituent national forests managed by, but not included in the name of, the named national forest in normal text. To reach the figure of 154 national forests, count hyphenated names as two forests, with the exception of Manti–La Sal, which is the official name of one forest.
The United States Forest Service (USFS) is an agency within the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands covering 193 million acres (780,000 km 2) of land. [5]
The forest resources of the United States remained relatively constant through the 20th century. [9] The Forest Service reported total forestation as 766,000,000 acres (3,100,000 km 2) in 2012. [10] [11] [9] A 2017 study estimated 3 percent loss of forest between 1992 and 2001. [12]
In the United States, the forest cover by state and territory is estimated from tree-attributes using the basic statistics reported by the Forest Inventory and Analysis (FIA) program of the Forest Service. [2] Tree volumes and weights are not directly measured in the field, but computed from other variables that can be measured. [3] [4]
The cause of the fire was determined to be an escaped prescribed burn started by the US Forest Service. The wildfire started on April 22, 2022, during extreme fire weather conditions. As of 15 June 2022 [update] , the Cerro Pelado Fire has burned 45,605 acres (18,456 ha) and is 100% contained.