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<br />TABLE 35 <br />WYOMING DEQ GUIDELINE FOR SUITABILITY <br />RATINGS FOR SOILS AS SOURCES OF TOPSOILING MATERIAL <br />C~ <br />Soil Characteristic.. .....Good...... .....Fair...... ...Poor.. .. .Unsuitable... <br />pH 1 6.0 - 8.4 5.5 - 6.0 5.0 - 5.5 Under 5.0 <br /> 8,4 - 8.8 8.8 - 9.0 Over 9.0 <br />Conductivity (Ec) Under 4 4 - 8 8 -16 Over 16 <br />mmhos/cm @ 25° <br />Saturatio^ Percent- 25 - 80 Over 80 <br />age (SP) Under 25 <br /> <br />Texture class sl, 1, sil, cl, sicl, c, sic, s <br /> scl sc, is <br />Sodium Adsorption Under 6 6 -10 10 -15 Over 15 <br />Ratio (SAR) <br />2 <br />Calcium Carbonate none - slight moderate high <br /> (0 - 15%) (15 - 30Y,) (Over 30%) <br />Moist Consistence friable loose, firm very firm <br />Dry Consistence loose, soft slight hard, very hard <br /> hard <br />Selenium 3 2 ppm or less greater than 2 ppm <br />4 <br />Boron. .... ....... <br />. S.ppm.or.less.. <br />greater <br />.than.5.ppm.... <br />1 Saturated Soil Paste, U.S.D.A. Handbook 60, pg. 102. <br />2 Effervescence with acid or CaC03 equivalent, U.S.D.A, Handbook 60, pg. 105. <br />3 Hot water soluble, A.S.A. Mono 09, Part 2, pgs. 1122-23. <br />4 Hot water soluble, A.S.A. Mono 09, Part 2, pgs. 1062-63. <br />5 Establishment of vegetation on soils having any of these extreme conditions <br />. would be severely restricted. <br />