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Table 9-3-1. Soil Procedures, Instrumentation, and References for • <br />Peabody Coal Company's Central Laboratory <br />Freeburg, Illinois <br />March, 1980 <br /> <br />Parameter Unit Procedure Instrumentation Reference <br />pH pH Saturated paste Orion Ionizer USDA Handbook 60 Method <br /> electrode Model 407A (21a), p. 102, 1969. <br />Conductivity mmhos/cm Saturated paste YSI Wheatstone USDA Handbook 60 Methods <br /> extract, except Bridge Model 31 (4a) and (3c), pp. 88-90, <br /> Table 9-2-6 which 1969. <br /> was 1:5 soil to <br /> water extract <br />Saturation % From volume of USDA Handbook 60 Method <br /> water added (27b), p. 107, 1969. <br />Water Soluble meq/1 Vaccum Extraction; Perkins-Elmer Extraction-USDA Handbook <br />Cations - Ca, Analysis by AA Models 306, 403, 60, Method (3a), p. 84, <br />Mg, and Na Spectrophotometry 5000 1969. <br />SAR ratio Calculated from USDA Handbook 60, p. 26, <br /> water soluble Ca, 1969. <br /> <br />Mg, and Na • <br />Particle Size % Hydrometer Method; Hydrometer Bouyoucos, 1962, Ag. <br />Analysis Sieve used for 140-Mesh Jour. Vol. 54, p. 464- <br /> very fine sand 465. ASA Monograph <br /> No. 9, p. 562-7, 1965. <br />Texture USDA Textural USDA Handbook 18 <br /> Chart p. 209, 1951. <br />Organic Matter % Modified Walkley Titration USDA Handbook 60 Method <br /> Black Apparatus (24), p. 105-106, 1954. <br />SE ppm Hot Water Extrac- Perkins-Elmer ASA Monograph No. 9, <br /> tion; Analysis by Models 306, 403 p. 1122, 1965, (US - <br /> Gaseous Method and 5000 EPA, 1976). <br /> AA Spectrophotometr y <br />B ppm Hot water extrac- Bausch & Lomb ASA Monograph No. 9, <br /> tion analysis by Models 700, R710 p. 1062, 1965 (Standard <br /> Curcumin Method Methods, 1976). <br />Total N1 ppm Kjeldahl Kjeldahl digestion ASA Monograph No. 9, <br /> method and distillation p. 1162, 1965. <br /> apparatus <br />Table 9-3-1 continued on next page. <br />9-23 Revised 5-27-81 <br />