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-11 - - <br /> TABLE 2A: Criteria to establish suitability of topsoil (or topsoil <br /> substitutes ).* <br /> Suitable <br /> Parameter Good Fair Poor Unsuitable <br /> pH 6.0-8.4 5.5-6.0 5.0-5.5 L 5.0 <br /> 8.4-8.8 8.8-9.0 4 9.0 <br /> EC (Conductivity) 0-4 4-8 8-16 > 16 <br /> mmhos/cm > 8 may prove <br /> difficult to <br /> re vege Late <br /> Saturation 25-80 >80 <br /> Percentage L 25 <br /> Texture 1/ sl , 1 , sil , cl , sicl , sc, c, sic, s <br /> scl , vfsl , fsl 1 s , Ifs <br /> SAR < 6 6-10 10-15 > 15 <br /> 10-12 2/ > 12 2/ <br /> Selenium < 2.0 ppm > 2.0 ppm <br /> Boron < 5.0 ppm > 5.0 ppm <br /> Calcium Carbonate 0-15ro 15-30� Over 30� <br /> Coarse Frag 0-15 15-25 25-35 > 35 <br /> 3-10 in. 0-3 3-7 7-10 > 10 <br /> (% vol ) 10in. <br /> Moist Consistency V,r, fr, iv, fl , Vfl , exfi , <br /> Dry Consistency lo, so sh, h vh <br /> 1/ 3CS. 1578. National SGiis Handbook, No;.ice 24. <br /> 2/ For fine textured soils (Cl ay '�- 401) (Gee et al . , 1978). <br /> * As taken from the Wyoming Department of Environmental Quality Land <br /> Quality Division 's Guideline No. 1 - Topsoil and Overburden. <br />