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Wesr Elk Mine <br />• maximum rooting and has little or no effect on the soil's fertility. Some depression in available <br />phosphate might result if this material would constitute the bulk of the root wne through <br />d;cr,..t,ance. If these materials were mixed with other soil materials, as would be the case if they <br />were transported to other locations and used for new seedbeds, the concentration of carbonate would <br />be diluted to the point where it would have little or no effect on fertility of common plants. <br />Table 21 Summary of the Suitability of Nest Elk 1Vline Soils as Seedbed Material <br />• <br /> <br />Ma in Unit Good Moderate Poor <br />1 X <br />4 X <br />5 X <br />6 X <br />X6 X <br />16 X <br />17 X <br />IS X <br />20 X <br />X25 X <br />26 X <br />X26 X <br />27 X <br />30 X <br />X30 X <br />31 X <br />X31 X <br />X32 X <br />33 3t <br />Xi8 X <br /> <br />TPXIrrrC <br />CJ <br />The high clay content of the soils of units 5, 31, X31, and X32 v~~ith their large shrink/swell ratios <br />poses a serious limitation to their use. Unit X32 is particularly limited in this respect. It has the <br />highest clay content and widestshrink/swell of any mapping unit in the survey. <br />The soils of units 5, 31, and X31 are considered marginally usable for revegetation Seedbeds in <br />these soils can be established with some difficulty but can be worked successfully only over a <br />narrow range of soil moisture. They would require careful manag?ment if used for revegetation <br />purposes. Unit X32 is considered unsatisfactory for seedbed material and would require very careful <br />preparation if soils of this unit are to be revegetated, even in their undisturbed condition. <br />201-13/ IN4 PROS; 89~ 7R71; Rn~iced lw. /995 PR06; .Nmch 2(~~06 PR/0 <br />