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• Table I-2• Criteria to establish suitity of topsoi~or topsoil substitutes • <br />_ Pazameter Suitable Mazeinal l/ Unsui ble <br />PH 5.5-8.5 5.0-5.5 <5.0 <br />8.5-9.0 >9.0 <br />EC (Conductivity) nunhos/cm 0-8 8-12 >12 <br />Saturation Percentage 25-80 <25 <br />>80 <br />Texture csios <br />SAR 2/ 0-10 10-12 3/ >12 3/ <br />10-15 >15 <br />Selenium <0.1 ppm >0.1 ppm <br />Boron <5.0 ppm >5.0 ppm <br />_Coarse Frag (% vo]) <25% 25-35 >35% <br />1 / Evaluated on an individual basis for suitability. <br />2/ As an alternative to SAR calculations, ESP (exchangeable sodium percentage) can be determined. ESP should be determined if suitable <br />SAR value is exceeded. <br />3/ For fine textured soils (clay>40%) <br />U~ilcnown/11-84 20 <br />Rules Update/8-94 <br />