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COLORADO SCHOOL OF MINES RESEARCH INSTITUTE <br />CONTENTS -- continued <br />Page <br />Plant Quality 45 <br />Microbial Relationships 48 <br />Discussion 49 <br />Plots with Type IV Spoil 49 <br />Spoil and Soil Traits 49 <br />Production as a Function of Soil Depth 51 <br />Percentage Cover as a Function of Soil Depth 55 <br />Rooting Depth 55 <br />Plant Quality 55 <br />Discussion 55 <br />SUMMARY AND CONCLUSIONS 59 <br />RECOMMENDATIONS 61 <br />REFERENCES 62 <br />Appendix A. Method of Soil and Spoil Analysis <br />Appendix B. Individual Plot Evaluations <br />The Center Plot 69 <br />The Big Sky Plots 78 <br />The Western Energy Plot 88 <br />The Big Horn Plot 97 <br />The Wyodak Plot 106 <br />The Belle Ayr Plot 116 <br />The Black Thunder Plot 125 <br />The Cordero Plot 134 <br />The Westmoreland Plot 143 <br />The Noonan Plot 153 <br />The Dave Johnston Plot 163 <br />The Jacobs Ranch Plot 172 <br />Appendix C. Element Content of Crested Wheatgrass as Reported in the 181 <br />Literature <br />iv <br />67 <br />69 <br />