The acreage is grouped by hydrologic unit. Irrigation data is only collected for cropland and pastureland. NRI maps reflect national patterns rather than site- specific information. Noncultivated cropland includes permanent hayland and horticultural cropland. Land that shows evidence of being irrigated during the year of the inventory or during two or more years out of the last four years.
Water is supplied to crops by ditches, pipes, or other conduits.
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. Also included are tracts of less than 10 acres that do not meet the above definition but are completely surrounded by Urban and Built-up land. Please include the Product ID you are inquiring about. If you use our analysis products, please be aware of our disclaimer .