When provided, refer to the estimated margins of error to determine suitability of the data for a particular purpose. NRI maps reflect national patterns rather than site-specific information. No data are collected for any year that land is in this ownership. When viewed vertically, canopy cover is 25 percent or greater. For classification as forest land, an area must be at least one acre and 100 feet wide.
Land cover is the vegetation or other kind of material that covers the land surface.
A geographic area, usually several thousand acres in extent, that is characterized by a particular pattern of soils, climate, water resources, land uses, and type of farming. 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. Grasslands, savannas, many wetlands, some deserts and tundra are considered rangelands. Certain low forb and shrub communities such as mesquite, chaparral, mountain shrub and pinyon-juniper are included in this category.