Change in Irrigated Acreage, 1982-1997 This bar map shows
changes in the acreage under irrigation for each state. The map
includes irrigated cropland and irrigated pastureland. Each
state contains 4 bars showing the increase or decrease in acres
for the following periods: 1982-1987; 1987-1992; 1992-1997;
1982-1997. The length of each bar is proportional to the number
of acres it represents. There were 67.5 million acres of
irrigated land in 1997. Cautions for this Product: This map does
not show the amount of acres currently under irrigation. 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, and the Pacific Basin.
Source: National Resources Inventory, 1997 NRI sample data are
generally reliable at the 95% confidence interval for state and
certain broad substate area analyses. Generally, analyses that
aggregate data points by smaller geographic areas and/or more
specific criteria result in fe