Agricultural Irrigation Initiative: Using Soil Electrical Conductivity Mapping for Precision Irrigation in the Columbia Basin

Variable Rate Irrigation (VRI) and Variable Speed Irrigation (VSI) applications require accurate maps of soil water-holding capacity as inputs to the applied water prescription generation process. Thus, determining accurate soil variability information and conducting soil mapping are necessary steps toward successful implementation of precision irrigation.2 These accuracy requirements are typically not satisfied by freely-available soil survey data.