. Carnegie Institution of Washington publication. PLATE 12. A. Roots of Calamovilfa longifolia in natural position at a depth of 3 or 4 feet. B. Agropyrum glaucum in mixed prairie, Mankato, Kansas. C. Root system in Secale cereale excavated in sandy 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