. Carnegie Institution of Washington publication. 94 Development and Activities of Roots of Crop Plants. Field Experiments, 1920. During the spring and summer of 1920, experiments were conducted to determine more precisely the water-absorbing power of crop-plants at various soil-levels. Barley was employed and the crop was grown under field con- ditions adjoining the crop-plats already described on the lowland area at FiQ. 40.—Diagram of containers and development of barley, 1920. Positions of wax seals, 6 inches apart, indicated by cross-lines. Containers of large size and especiall
. Carnegie Institution of Washington publication. 94 Development and Activities of Roots of Crop Plants. Field Experiments, 1920. During the spring and summer of 1920, experiments were conducted to determine more precisely the water-absorbing power of crop-plants at various soil-levels. Barley was employed and the crop was grown under field con- ditions adjoining the crop-plats already described on the lowland area at FiQ. 40.—Diagram of containers and development of barley, 1920. Positions of wax seals, 6 inches apart, indicated by cross-lines. Containers of large size and especially designed for ease of root examina- tions were used. The larger ones, in which the crops were grown for long periods or to maturity, were cylindrical in shape, feet in diameter, and feet deep. They consisted of heavy galvanized sheet-iron rolled into a cylinder, with an overlap on the edge of 5 inches, fitted into a one-piece cir- cular bottom with an upright edge of inch, and held in place by three. 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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