Pressure Irrigation on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice IT02
This data set represents the estimated percentage of the 1-km grid cell that is covered by or 
subject to the agricultural conservation practice (CPIT02), Pressure Irrigation Source (PI) on 
agricultural land by county.  Pressure Irrigation Source is described as irrigation "delivered 
to the farm and/or field in pump …