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• <br /> TABLE 4.4-35 <br /> CRITERIAa FOR EVALUATION OF TOPSOIL SUITABILITY <br /> Limits Restrictive <br /> Property Good Fair Poor Feature <br /> Sodium Adsorptionb <5 5-12 >12 Sodium <br /> Ratio (SAR) <br /> Salinity (mmhos/cm)b <8 8-16 >16 Salt <br /> Boronc --- --- >5ppm Boron <br /> Soil Reaction (pH)b 5.6-7.8 4.5-5.5 <4.5 Acid <br /> Soil Reaction (pH)b <7.9 7.9-8.4 >8.4 Lime, <br /> Alkaline <br /> Available Water-d >0.10 0.5-0.10 <0.05 Droughty <br /> Holding Capacity <br /> (in./in.) <br />• Soil Erodibilitye <0.37 X0.37 --- Water <br /> Factor (K) erodibility <br /> Wind Erodibilityf >3 3 1,2 Wind <br /> Group erodibility <br /> USDA Textureb --- SCL,CL, C, SIC, Clayey <br /> SICL SC <br /> USDA Textureb --- LCOS,LS COS,S, Sandy <br /> LFS,LVFS FS,VFS <br /> Coarse Frag. (vol. p ct.)g <br /> 3-10 in. <15 15-35 >35 Stones <br /> > 10 in. < 3 3-10 >10 Stones <br /> a Adapted from Nati onal Soils Handbook, NSH - Part II (403.6[a] ), (USDA-SCS <br /> b 1978). <br /> Analytical data; see Table 4-2. <br /> c <br />Criteria adapted from limits for boron (Wyo. DEQ 1981). <br /> d <br />Evaluation based on textural class, an d field des cription of coarse fragments <br /> (USDA-FS 1974). <br /> e <br />Calculation based on lab data and fiel d descripti on (Wischmei er and Smith <br /> f 1978). <br />• Estimation based on textural class (US DA-SCS 1978 ). <br /> g <br />Calculated from f ield estimate. <br /> 15.22 <br />