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I-6 <br /> <br />• <br />TABLE I-1 (continued) <br />Analysis <br />Reference Procedure <br />10. Particle size distribution <br />(mechanical analysis) as ~ sand, <br />o silt, $ clay and very fine , <br />sand as well a:s the USDA textural <br />classification. <br />11. Selenium (ppm)b <br />12. Molybdenum (ppm) <br />13. Organic Matter (percent) <br />ASA Agronomy Monograph #9, <br />part 1, method 43-5, pp. 562- <br />566. If EC is 4 mmhos/cm <br />or more, include field <br />texture determination. <br />Hot Water Extract - sum of <br />water soluble selenate, <br />selenite, and organic <br />Selenium Extraction Procedure, <br />ASA Agronomy Monograph #9, <br />part 2, 80-3.2.2, p. 1122. <br />Analysis of extract by <br />sodium borohydride method. <br />See Advances in Yapor <br />Generation (1974), presented <br />at Silver Anniversary, <br />Pittsburgh Conference on <br />Analytical Chemistry and <br />Applied Spectroscopy, <br />Cleveland, Ohio. <br />Acid Ammonium oxalate <br />extraction. ASA Agronomy <br />Monograph #9, part 2, pp. <br />1054-57. Analysis by <br />thiocyanate procedure in <br />this reference or by atomic <br />absorption spectrophotometry. <br />ASA Agronomy Monograph #9, <br />part 2, method 90-3, pp. <br />1372-1376. <br />a If toxic levels of boron are suspected of being present. <br />• b If primary selenium indicator plants are present. <br />THIS DOCUMENT (:ONTAINS TRADE SECRETS AND PRIV ILEGE D, CONFIDENTI AL AND <br />PROPRIETARY COMMERCIAL, FINANCIAL, GEOLOGICAL AND GEOPHYSICAL DATA AN ~oo~ <br />INFORMATION. PIJ RSUANT TO LAW, THOSE PORTIONS MARKED "CONFIDENTIAL" 0~ <br />MAY NOT BE DISCLOSED, COPIED OR MADE AVAILABLE FOR PUBLIC INSPECTION. <br />9 <br />