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i <br />:~ <br />N <br /> <br /> Table I-1. Soil Analysis Pro cedures and Referenc es for Agricultural <br /> Consultants, Inc., Brighton, Colorado, June 1980 and November 1981. <br /> <br />Parameter Unit Procedure Instrumentation References <br />pH pH Hydrogen ion Corning Model 125 USDA Handbook 60, <br /> Electrode Method (21a), p. 102 <br />Conductivity, mmhos/cm3 Conductivity Barnstead Model USDA Handbook 60, Method (3a) pg. 84 <br />EC Bridge TM-70C6 and Method (4b), pg. 89-90 <br />Saturation % Dried to 105°C. Mettler balance USDA Handbook 60, Method (27 a) and <br />Point, SAT weight loss Blue M oven (27b) pg. 107 <br />Water Soluble meq/1 Vacuum extract Perkin-Elmer Extraction-USDA Handbook 60, Method <br />Calcium, Ca; atomic absorption Model 403 3a, pg. 84, Analyses - AA <br />Magnesium, Mg; <br />Sodium, Na <br />Sodium Adsorp- Calculation from USDA Handbook 60, p. 26 <br />tion Ratio, SAR water soluble <br /> cations <br />Boron, B ppm Hot Water Soluble Coleman Linear Carmine Method, ASA Monograph <br /> Spectrophotometer #9, pp. 1062, 1063 <br />Copper, Cu ppm DTPA Extract Perkin-Elmer SSSAP, Vol. 35, No. 4, <br /> Model 403 pp. 600-602, 1971 <br />Particle Size % Hydrometer Hydrometer ASA Monograph #9, Method 43-5, <br />Analyses - Sieve Sieve pp. 562-567 <br />sand, s; silt, <br />si; clay, c; <br />and very fine <br />sand, vfs <br />Texture, Using particle USDA Agriculture Handbook #18, <br />TEXT size determination 1951. Soil Survey Manual. <br /> and USDA Texture pg. 209 <br /> Chart <br />Organic Matter, % Modified Walk ley Automatic Titrator ASA Monograph #9, Method 90-3, <br />OM Black pp. 1372-1376. <br />Molybdenum, ppm Hydrofluoric Perkin-Elmer Meglen, 1975 Fydrofluoric <br />Mo Digestion Model 403 Digestion itrihods <br />• <br /> <br />