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<br />TABLE I-1 <br />SUITABILITY RATINGS FOR SOILS AS SOURCES OF TOPSOILING MATERIAL.* <br />Degree of Soil Suitability <br />Soil Characteristic Good Fair Poor Unsuitable5 <br />H <br />N <br />r <br />pHl 6.0 - 8.4 5.5 - 6.0 <br />8.4 - 8.8 8.8 - 9.0 <br />Conductivity (Ec) <br />mmhos/cm @ 25° Under 9 4 - 8 <br />Saturation Percentage (SP) <br />Texture class <br />Sodium Adsorption <br />Ration (SAR) <br />Calcium Carbonate 2 <br />Moist Consistence <br />Dry Consistence <br />Selenium3 <br />Boron4 <br />5.0 - 5.5 Under 5.0 <br />8 - 16 <br />Over 16 <br />25 - 80 Over 80 <br />Under 25 <br />sl, 1, sil, cl, sicl, c, sic, s <br />scl sc, is <br />Under 6 6 - 10 10 - 15 <br />none/slight moderate high <br />(0-158) (15-308) (Over 308) <br />friable loose, very firm <br />firm <br />loose, slight very hard <br />soft hard, hard <br />2 ppm or less <br />5 ppm or less <br />Ovez 15 <br />greater than 2 ppm <br />greater than 5 ppm <br />1 Saturated Soil Paste, U. S.D.A. Handbook 60, page 102. <br />2 Effervescence with acid or CaCO3 equivalent, U.S.D.A. Handbook 60, page 105. <br />3 Hot water soluble, A.S.A. Mono $9, Part 2, pages 1122-23. <br />4 Hot water soluble, A.S.A. Mono $9, Page 2, pages 1062-63. <br />5 Establishment of vegetation on soils having any of these extreme conditions <br />would be Beverly restricted. <br />*SOURCE: Wyoming DDQ, Guideline No. 3, July 16, 1976, Page 4. <br />