Irrigation Land Leveling on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 464
This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to the 
agricultural conservation practice (CP464), Irrigation Land Leveling (ILL) on agricultural land by county.  
Irrigation Land Leveling is described as "[r]eshaping the surface of land to be irrigated to planned …