* Although the U.S. Geological Survey collects data every five years, there are a few years of delay in releasing the data in order to fully process it.
Years Available: 2005, 2010, 2015
Permanent Link: http://data.sagepub.com/sagestats/6612
General Notes: *Median value gives the value for the "average" county for this metric, the 50th percentile of all counties reporting data. **Water that is applied by an irrigation system to assist crop and pasture growth, or to maintain vegetation on recreational lands such as parks and golf courses. Irrigation includes water that is applied for pre-irrigation, frost protection, chemical application, weed control, field preparation, crop cooling, harvesting, dust suppression, leaching of salts from the root zone, and conveyance losses. An irrigation system that wets only a discrete portion of the soil surface in the vicinity of the plant by means of applicators (such as orifices, emitters, porous tubing, or perforated pipe) and operated under low pressure. The applicators may be placed on or below the surface of the ground or suspended from supports. See also irrigation water use, sprinkler irrigation system, and surface irrigation system.