Major input to the code includes pairs of measured water content and suction. With the derived parameters, the program computes for selected pressures the observed and fitted moisture contents and the soil hydraulic properties. If saturated hydraulic conductivity is unknown the program provides an estimated value. SOIL provides for interactive data entry and editing and includes graphical display of observed and fitted results of the soil-water characteristic function.
Documentation includes user's instructions, theory, and a description of the example problems.