Technical Abstract: Infiltration of water into the soil and subsequent movement of this water to plant roots are critical considerations for agricultural production. Other interests which involve understanding the movement of water through the soil include water flow to subsurface drains and wells, surface water flow, and evaporation from the soil to name a few. Because of this, the characterization of the infiltration of water into the soil is critical. The property which describes the rate at which water flows through the soil is called the hydraulic conductivity. Hydraulic conductivity is a function of the position in the porous media and the direction of flow. The definition and application of hydraulic conductivity is discussed. Representative values of hydraulic conductivity and methods of determination are presented.