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<br />• ATTACHMENT B • <br />RECOMMENDED METRODS FOR SOIL ANALYSIS <br />Topsoil <br />pR <br />Conducti vi ty <br />Saturation <br />Percentage <br />Par ti c1 e <br />Size <br />Analysis <br />Texture <br />Soluble Ca, <br />Mg and Na <br />Sodium <br />absorption <br />ra ti o <br />Selenium <br />Reported As <br />Recommended ProceduFe <br />Hydrogen ion activity at USDA Handbook 60, method (21a), <br />saturation (paste) Page 102 <br />rronhos/cm @ 25° C USDA Handbook 60, method (3a), <br />Page 84 and method (4b), page 89-90 <br />or ASA Mono. No. 9, Part 2, <br />page 937-940. 1/ <br />Percent USDA Handbook 60, method (27a s b) <br />page 107 <br />clay, silt, sand and ASA Mono. No. 9, Page 1, method <br />very fine sand 43-5, page 562-566. Sieve <br />(vfs = 0.05-O.lmm) analysis for vfs (140-270 mesh) <br />USDA Textural Class USDA Handbook 18, page 205-223 <br />meq/1 Extraction of Ca, Ng and Na by <br />USDA Handbook 60, method (3a), <br />page 84. Analysis by atomic <br />absorption spectrophotometry. <br />SAR calculated from USDA Rabook 60, page 26 <br />soluble Ca, Mq s Na <br />concentrations <br />ppm to a lower detection Hot water extract - sum of water <br />limit of 0.02 soluble selenate, selenite and <br /> organic Se. Extraction Procedure- <br /> A.S.A. Monograph No. 9, Part 2, <br /> 80-3.1.2 p. 1I22. Analysis of <br /> extract by sodium borohdride method <br /> Advances in Vapor Generation, 1974 <br /> presented at Silver Anniversary, <br /> Pittsburgh Conference on Analytical <br /> Chemistry and Applied Spectoscopy, <br /> Cleveland, Ohio <br />-cont'd- <br />