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Soil series descriptions are provided in Addendum 9-6-3, Soil Profile Descriptions for all • <br />Sampled Pedons, and identify the morphology of representative soil profiles on the study <br />area. Series descriptions were obtained from sampled soil pedons and have been correlated <br />with their analytical results as well as with SCS soil series criteria to the extent <br />applicable. Each soil map unit has a soil landscape photograph. All photographs are <br />on file at PCC's Division Office in Flagstaff, Arizona. <br />Soil Laboratory Results. The results of laboratory analysis of all soil samples collected <br />during the 1987 and 1988 soil surveys are provided in Addendum 9-6-4, Soil Laboratory <br />Data. The mollic epipedon surface samples (Buckskin, Routt, Skylick, Splitro, Wineveda) <br />have high silt (45-60~) levels with loam, silt loam, and silty clay loam textures. <br />Reaction values are medium acid to slightly acid. Moderately high saturation percentages <br />(55-65@) are indicative of very high organic matter levels (4-8'd). Salinity and sodicity <br />values are typically very low (less than 0.3 mmhos/cm and 0.1, respectively) rvith calcium <br />the dominant cation. <br />The fine particle size class samples (Aaberg, Bi nco, Buckskin, Ga po, Routt) have high clay <br />(40-60~) and silt (35-50@) contents with silty clay, clay, and silty clay loam textures. • <br />Reaction values are typically neutral but occasionally range to very strongly acid. <br />Moderately high and high saturation percentages (50-70g) are indicative of the high clay <br />percentages. Salinity values are very low (less than 0.4 mmho s/cm and 0.5, respectively). <br />The substratums of Aaberg, Binco, and Buckskin had slight accumulations of calcium <br />carbonate (2-10@). <br />A loss on ignition (Total Organic Carbon-TOC) organic matter test was performed on five <br />samples for comparison with Wal kl ey-B1 ack method organic matter results. As expected, TOC <br />values for loamy and clay soils were 15 percent and 130 percent, respectively higher <br />than Wal kl ey-Black. <br />Suitability of Soils for Topsoiling. An evaluation of each soil series and soil series <br />variant suitability as a topsoil resource is provided in Addendum 9-6-5, Evaluation of <br />Topsoil Suitability. Each soil type was evaluated by individual sampled and/or described <br />horizons for significant physical and chemical parameters presented previously in Table <br />9-6-2. The range of characteristics for each soil type (presented in Addendum 9-6-3) was <br />also evaluated. A summary of restrictive features for each sampled pedon, as well as • <br />recommended topsoil salvage depths for each representative sampled and/or described <br />9-6-23 Revised 05/16/88 <br />