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- texture (fine earth fraction) <br />- coarse fragment content (type-gravel, cobble, sandstone <br />channer, etc.; size (2mm-3", 3"-10", 10"); and percent (%) <br />by volume, if significant <br />- soil structure (type, size, and grade) <br />- soil consistence (dry, moist, and wet) <br />- roots (number, size, and depths) <br />- clay films, if present (number, thickness, occurrence) <br />- effervescence with 0.1 N HC1 (none, slight, moderate, strong, <br />violent) <br />- mottles, 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 <br />also described: <br />- vegetation <br />- parent material <br />- physiography (geomorphic position) <br />- relief, if significant <br />- elevation (obtainable from topographic maps) <br />- slope <br />- aspect <br />- erosion condition <br />- permeability <br />- internal drainage class <br />- depth to ground water, if encountered <br />- salts or alkali <br />- surface stoniness <br />The sampling site location and number were plotted on the field map <br />(Exhibit 9-5, Soil Sample Locations). <br />One 2-quart sample was taken to represent each natural or man-made soil <br />horizon or contrasting layer within the depth to 72 inches or bedrock, <br />whichever was shallower. Profiles were sampled with a spade for the <br />~. upper 18 inches and a hand bucket auger for the remaining depth. The <br />9-4-1"c Revised 11/01/86 <br />