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TABLE 5 •
<br />(Continued)
<br />Footnotes•
<br />t
<br />These suitability levels are to be used as a guide in evaluating the degree of
<br />suitability for an overburden, underburden, or regraded spoil material for
<br />reclamation. The evaluation should take into account the "total system". Interactive
<br />parameters may either nullify or verify the signif icence of a potential problem.
<br />2
<br />This value is supported by MDSL (7994) and USDI-OSXRE (7985a).
<br />3
<br />This value is supported by USDA (7979), MDSL (1994), end USDI-BLX (1977).
<br />4
<br />The low limit of this range is supported by VDEO (1985). USDA (1979) end USDA (1983)
<br />recommend a lower tolerance limit of 4.5 vhereas USDI-BLM suggests 3.5.
<br />5
<br />The upper tolerance limit of this range is recommended by USDA (7979) and VDEG (7985)
<br />whereas USD [-OSMRE (1985a) proposes 8.8.
<br />6
<br />The actual minimum or maximum acceptable salinity level will depend on the plant
<br />species proposed in the revegetation plan, the potential for upward salt movement, and
<br />the particle size.
<br />7
<br />The Lower limit of 8 is recommended by Barrett et al. (1980), YDED (1985), USDA
<br />(1983), USDI-OSMRE (1965x), Schafer (1979, 1980), and USDI-BLR (1977). Both MDSL •
<br />(1994) end USDA (1979) indicate lover limits of 4 and 6 may be essential for certain
<br />plant species. The upper limit of 12 is proposed by YDECI (1985) end USDI-OSMRE
<br />(1985e), whereas USDA (1983) end USDI-BLR (1977) recommend 16, USDA (1979) proposes 9,
<br />white MDSL (1994) end Schafer (7979, 1980) specify 8.
<br />g ,
<br />These values are recommended by USDI-OSMRE (1985a), MDSL (7994), end YD EO~,(1985) with
<br />the exception that VDEO (1985) proposes an upper limit of 60 end MDSL (1994) 90.
<br />9
<br />Specific level depends upon clay mineralogy, soil texture, and saturation percentage
<br />according to Dollhopf et al. (1985).
<br />10 These values are similar to those recommended by Barrett et al. (1980), MDSL (7994),
<br />VDEO (7985), USDA (1983), USDI-OSMRE (1985e), Schafer (1979, 7980), and USDI-BLM
<br />(1977>.
<br />17 Proposed by USDI.OSMRE (7985a).
<br />12
<br />The specific percentage of clay or send will depend upon clay mineralogy, size of sand
<br />fraction, end saturation percentage. Abbreviations include s - send, R-CO s - medium
<br />to coarse send, Is - loamy sand, sl - sandy loam, l - loam, si - silt, cil - silt
<br />loam, sicl - silty clay loam, sic - silty clay, cl - clay loam, sc - sandy clay, c -
<br />clay.
<br />13 Very similar to recommendations by Schafer (1979, 1980), USDI-OSMRE (7985e), USDA
<br />(1983), YDEO (7985), end USDA (7979). •
<br />14
<br />Similar to USDI-OSRRE (7985a), USDA (1979) proposes greeter then 60X clay.
<br />26 Revised 03/01/95
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