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Table 2. Procedures and equipment utili:ed~by the Front Range Lab, Inc. 1n analyzing soli and vegetation <br />samples collected in 1976 and 1979 . <br />So11 parameter Untt Procedure Instrunentatlon References <br />pH pH Electrode Fisher Accumet <br />Conductivity mmhos/cm Conductivity YSI-Model 31 <br /> Bridge <br />Saturation X Dried to 105°C Mettler balance <br /> wel9ht loss Blue M oven <br />Hater soluble meq/1 Vacuum extract Perkin-Elmer 5000 <br />Calcium (La) Atomic absorption <br />Hater soluble neq/1 Vacuum extract Perkin-Elmer 5000 <br />Magnesium (Mg) Atomic absorption <br />Slater soluble meq/1 Vacuum extract Perkin-Elder 5000 <br />Sodium (Na) Atomic absorption <br />Sodium absorp- Calculation from <br />[ion ratio (SAR) Hater soluble <br /> cations <br />Organic natter Y Walkley-Black Coleman linear spectro- <br /> a~etl~od photanr=ter <br />Selenium (Se) ppm Ilot water extrac- Perkin-Elmer 5000 <br /> Lion, hydride- <br /> atomic absorption <br />Boron (B) ppm Ilot water soluble Coleman linear spectro- <br /> --. ... ..... j.no.m.w .~~ <br />USDA Handbook 60, Method (21a), <br />p. 102. <br />USDA Ilandbaok 60, p. 89. <br />USDA Ilandbook, 60, p. 101 <br />Extraction - USDA Ilandbook 60, <br />p. 84. Analyses - AA. <br />Extraction - USDA Ilandbaok 60, <br />p. B4. Analyses - AA. <br />Extraction - USDA Ilandbook 60, <br />p. 84. Analyses - AA. <br />USDA Ilandbook 60, p. 26. <br />ASA Monograph /9. Part 2, Method <br />90-3, pp. 1372-1376. <br />Caldwell EPA 1972, ASA Monograph <br />!9, p. 1122; Applied spectroscopy <br />vul. 30, Mo. 1, 1976. pp. 30-42. <br />ASA Monograph l9, pp. 1062-1063. <br />r <br />N <br />