Gravity and Pressure Irrigation on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice IT03
This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to the 
agricultural conservation practice (CPIT03), Gravity and Pressure Irrigation Source (GPI) on agricultural land 
by county.  Gravity and Pressure Irrigation Source are described as a "combination of Gravity and …