A field experiment was conducted to determine unsaturated hydraulic conductivity K(e) and water retention h(e) curves of an important soil from Punjab, Pakistan. The matric potential (h) and volumetric soil water content (e) were measured with tensiometer and neutron probe, respectively. Observed data were fitted to the van Genuchten-Maulem model through SFIT computer model to obtain moisture retention and hydraulic conductivity curves of the soil. Parameter optimization looks like a promising technique for relatively good description of the hydraulic behaviour of the soil. Key words: parameter optimization, soil hydraulic properties
