This map does not show change in irrigation for land uses other than cropland and pastureland. Data are not collected on Federal land. Data are not available for Alaska or the Pacific Basin. NRI maps reflect national patterns rather than site- specific information. Noncultivated cropland includes permanent hayland and horticultural cropland.
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. Irrigation For additional information contact the Resource Assessment Division. Please include the Product ID you are inquiring about. If you use our analysis products, please be aware of our disclaimer .