. Carnegie Institution of Washington publication. PLATE 22. A. Field of winter wheat (left) and spring wheat (ruht) on the hard land near Limon, Colorado. B. Winter wheat on Pierre clay, Ardmore, South Dakota. C. Consocies of Stipa viridula in an abandoned Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington

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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1920, bookyear1920