Data for Puerto Rico and the U.S. Virgin Islands is shown by 6-digit hydrologic unit. NRI maps reflect national patterns rather than site- specific information. No data are collected for any year that land is in this ownership. Although grazing is generally a predominate use, the term is used independent of any use. Includes all lands having plants harvestable by grazing without reference to land tenure, other land uses, management, or treatment practices.
Land cover is the vegetation or other kind of material that covers the land surface.
Includes all land and water areas where the ownership is by private, municipal, county or parish, state, Indian tribal, individual trust, the Tennessee Valley Authority, or areas under temporary control of a Federal, state, county or municipal agency or government for foreclosure or nonpayment of taxes. Pastureland may consist of a single species in a pure stand, a grass mixture or a grass-legume mixture. Management usually consists of cultural treatments-fertilization, weed control, reseeding, or renovation and control of grazing. This would include areas where introduced hardy and persistent grasses, such as crested wheatgrass, are planted and such practices as deferred grazing, burning, chaining, and rotational grazing are used, with little or no chemicals or fertilizer being applied. Grasslands, savannas, many wetlands, some deserts, and tundra are considered to be rangeland.