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ICrI, if present, were also described, sampled, and analyzed for characterization purposes and <br />• possible subsequent use es a topsoil substitute, ii needed. <br />Surface horizons (A1, A2, etc.), were sampled to represent no greater than about 6 to 12 <br />inches of soil material per sample. In the subsoil and substratum IB and C horizons), natural <br />horizons (Bw, Bt, C1, C2, and so forth) were subdivided such that individual samples did not <br />represent greater than about 18 to 24 inches of soil material. <br />Physical and, where possible, chemical properties of each horizon within the sampled profile <br />were described and recorded in the field on standard NRCS soil description forms. These <br />properties included: <br />• Depth and thickness of horizons <br />• Relative position of soil horizons <br />• Type and nature of horizon boundaries <br />• Color (dry and moist) of horizons <br />• Texture (fine earth fraction) <br />• Rock fragment content {type -gravel, cobble, sandstone channer, etc.; size <br />l2mm-3", 3"-10", greater than 10"1; and percent 1°.61 by volume) <br />• Soil structure (type, size, and grade) <br />• Soil consistence (dry, moist, and wet) <br />• Roots (number, size, and depth) <br />• Clay films, if present (number, thickness, occurrence) <br />• Effervescence with 0.1 N HCI (none, slight, moderate, strong, violent) <br />• Mottles Iredoximorphic features), if present (number, size, distinctness, color) <br />• Soil moisture characteristics at the time of sampling <br />In addition, at each soil sampling site, the following parameters were also described: <br />• Vegetation <br />• Parent malarial <br />• Physiography (geomorphic position) <br />• Relief lif significant) <br />• Elevation (obtainable from topographic maps) <br />• Slope <br />• Aspect <br />• Erosion condition <br />• Permeability <br />• <br />13 Revised 9/98 <br />