“…The area irrigated in the South Ogallala Zone, which basically corresponds to the Southern High Plains of Texas and New Mexico, is about the same in 1974 as it was in 1959, as shown in Figure 1 ^Data include all irrigation in the regions including groundwater from all sources, privately and public«ily provided surface water. Groundwater from the Ogallala Aquifer would irrigate around 80%, 98%, and 100% of the acres shown for the Nocth, Central, and South Ogallala zones, respectively, in 1969. ^Source: Department of Commerce (1961,1967,1972,1977). Zone.…”