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The TRIM System is a simple-to-use laboratory device for measuring the soil-water retention curve (SWRC) and hydraulic conductivity function (HCF) of unsaturated soils in significantly less time than other approaches. The SWRC and HCF may be measured along either wetting or drying paths in as little as 5-7 days using either disturbed or undisturbed samples. The system may be operated in either steady-state mode or transient mode and is applicable for all major soil types, including sand, silts, and clays