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TABLE 9 <br />• Suitability Ratings for Soils as Sources <br /> of Topsoiling Material* <br /> Degree of Soil Suitability <br />Soll Characteristic Good Fair Poor <br />pH 1/ 6.0 - 8.4 5.5 - 6.0 5.0 - 5.5 <br /> 8.4 - 8.8 8.8 - 9.0 <br />Conductivity (E.C.) Under 4 4 - 8 8 - 16 <br />mmhos/cm @ 25° <br />Saturation Percent- 25 - 80 Over 80 <br />age (S P) Under 25 <br />Texture Class sl, 1, sil cl, sicl, c, sic, s <br /> scl sc, is <br />Sodium Absorption Under 6 6 - 10 10 - 15 <br />Ratlon (SAR) <br />Calcium Carbonate 2/ none-slight moderate high <br /> (0 - 15X) (15 - 30%) (Over 30%) <br />• <br />Moist Consistence friable Loose, firm very firm <br />Dry Consistence loose, soft slight hard, very hard <br />Unsuitable <br />Under 5.0 <br />Over 9.0 <br />Over 16 <br />Over 15 <br />hard <br />Selenium 3/ 2 ppm or less greater than 2 ppm <br />Boron 4/ 5 ppm or less greater than 5 ppm <br />1/ Saturated Soil Paste, U.S.D.A. Handbook 60, pg. 102. <br />2/ Effervescence with acid br CaC03 equivalent, U.S.D.A. Handbook 60, <br />pg. 105. <br />3/ Hot water soluble, A.S.A. Mono 119, Part 2, pgs. 1122-23. <br />4/ Hot water soluble, A.S.A. Mono A9, Part 2, pgs. 1062-63. <br />5/ Establishment of vegetation on soils having any of these extreme <br />conditions would be severely restricted. <br />* From Wyoming Department of Land Quality Guideline No. 3 <br />• <br />