Experimental forest
An experimental forest, or experimental range, as defined by the United States Forest Service, is "an area administered ... 'to provide for the research necessary for the management of the land.'" == Size and relation to other areas == According to the USFS, "Most Experimental Forests are large enough to contain significant stream systems and several dozen contain experimental watershed study sites with multiple paired basins." Individual experimental forests range from 0.47 to 225 km2 (120 to 55,600 acres) in area.