It could be correlated with similar maps for 1982 and 1987 for trend analysis. This map displays areas where corn production makes up varying proportions of total cropland. It may not be appropriate for identifying,even on a national basis, the major areas in the U.S. where corn is grown. 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.
Land cover is the vegetation or other kind of material that covers the land surface.
Includes all land and water areas where the ownership is by private, municiple, county or parish, state, Indian tribal, individual trust, the Tennessee Valley Authority, or areas under temporary control of a Federal, state, county or municiple agency or government for foreclosure or nonpayment of taxes. Please include the Product ID you are inquiring about. If you use our analysis products, please be aware of our disclaimer .