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<br />TableI-4. Suitability ratings for major characteristics to determine the handling of subsoil. <br />.. <br />~. <br />N <br />0 <br /> <br />auu~uii marginally <br />Characteristic Suitable Suitable Unsuitable <br />pH <br />5.5-8.8 <br />5.0-5.5 <br /><5.0 <br />>9.0 <br />Electrical Conductivity 0-8 8-16 > 16 <br />Texture <br /> <br />r~ <br />> 45% C1 <br />>45% cl <br />Saturation Percent 25-80% > 80%, < 25% > 80%, < 25% <br /> <br />Sodium Adsorption Ratio 0-10 10-15 > 15 <br /> <br />Nitrate-Nitrogen <50 ppm >50 ppm >50 ppm <br /> <br />Acid-Base Potential > -5 <-5 <-5 <br />Lime <br /> <br />> <br />Seleniuma < 5 ppm > 5 ppm > 5 ppm <br />Boron <br /><5 PPm <br />>5 ppm <br />> 5 ppm <br />a See text, Section 6.g for discussion. <br />