This feature class includes
monitoring data collected nationally to understand the status,
condition, and trend of resources on BLM lands. Data are collected in
accordance with the Interpreting Indicators for Rangeland Health (IIRH)
method. The IIRH method is a qualitative assessment of rangeland health,
defined as "the degree to which the integrity of the soil, vegetation,
water, and air, as well as the ecological processes of the rangeland
ecosystem are balanced and sustained." Attributes include the final
rating for IIRH indicators: hydrologic function, biotic integrity, and
soil/site stability (see Entity/Attribute Section for exact details on
attributes). Data were collected and managed by BLM Field Offices, BLM
Districts, and/or affiliated field crews with support from the BLM
National Operations Center. Data are stored in a centralized database
(TerrADat) at the BLM National Operations Center.