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Each state in this region maintains a Big Tree program that honors the largest individual tree of each species. Champion trees are determined by adding together measurements of trunk circumference, height, and canopy spread. Rosburg identifies the trees with the largest diameter and the tallest trees among the champion trees in the Upper Midwest by their county and state. Together his superb photographs and key information make this guide the perfect companion for enjoying the diversity of trees in all kinds of environments.
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Thomas Rosburg, a professor of biology at Drake University, has received thePrairie Advocate Award from the Iowa Prairie Network, the? Governor's Iowa Environmental Excellence Award, the ?Loess Hills Preservation Society Special Recognition Award, and the Iowa Chapter of the Sierra Club's Environmental Educator Award. He is the photographer for the second editions of both Wildflowers of the Tallgrass Prairie: The Upper Midwest (Iowa, 2009) and Wildflowers and Other Plants of Iowa Wetlands (Iowa, forthcoming).
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