FIG. 4. Predicted steady-state osmotic head (potential in kilopascals = 9.81 x head in meters) profiles for the sandy loam (SaL) and silt loam (SiL) soils from simulations of the electrical conductivity (EC) = 1.2 and 9 dS/m for ratios of irrigation to pan evaporation (I/E0) = (A) 1.6, (B) 1.0, and (C) 0.6.