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Wills SA, Herrick JE, Tugel A. Inference space vs. sampling requirements: A simulation study of soil properties on rangeland ecosites. In: 62nd Society for Range Management Annual Meeting. Alb., NM: Society for Range Management; 2009. p. 90-7. Abstract
Hansen N, Bestelmeyer BT, Brown J, Tugel A. Incorporating invasive species and degraded landscapes into ecological site descriptions. In: Society for Range Management Annual Meeting. Louisville, KY; 2008. 2100. (Building Bridges: Grasslands to Rangelands). Abstract
Herrick JE, Wills SA, Peters DC, Tugel A, Bestelmeyer BT. Soil, resilience, and state and transition models. In: Society for Range Management Annual Meetings. Louisville, KY; 2008. 1514. (Building Bridges: Grasslands to Rangelands). Abstract
Tugel A, Ward J, Herrick JE, Biggam P, Hipple K, Ypsilantes B, et al. Sampling dynamic soil properties and vegetation for soil survey and ecological site descriptions. In: Society for Range Management 60th Annual Meeting and Trade show. Reno/Sparks, NV; 2007. Paper No. 444. Abstract
Truman D, Scott C, Tugel A, Ward J, Parslow V, Biggam P, et al. An evaluation of the dynamic soil properties pilot project in Arches National Park, UT. In: 60th Annual Meeting and Trade Show, Society for Range Management. Sparks/Reno, NV; 2007. Paper No. 442. Abstract