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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 HCl (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 /> 9-4-12 Revised 11/01/86 <br />