Hydric Soil Determinations (Click on any photo to enlarge) Close up of extracted block of peat soil derived from Sphagnum mosses, Lopez Island, WA Gleyed soil (Indicator F2 Loamy Gleyed Matrix) Gleyed soil (Indicator F2 Loamy Gleyed Matrix) Soils with Redox Concentrations (formerly called ‘mottles’); Hydric Indicator F3 Depleted Matrix. Mucky mineral hydric soil, San Juan Island, WA. Hydric Indicator F1 Loamy Mucky Mineral. Hydric Soils In-Field Training, Washington Society of Professional Soil Scientists. Hydric soil field tour in northern Florida. National Society of Consulting Soil Scientists.