. Carnegie Institution of Washington publication. POTATOES BARLEY 9 10 BARLEY WHEAT GRASS BIG BLUESTEM. ^m ^m Iff' WM 16 FlQ. 42.—Diagram of containers and root development of crops, 1921. Horizontal lines (6 inches apart, except in last two) indicate position of wax seals and double vertical lines position of nutrients. When the containers were filled within 2 inches of the tops, two thin wooden strips, about inches in width and as long as the diameters of the containers, were placed edgewise and partially sunk into the soil so as to prevent the wax seal from covering the area of soil (ab
. Carnegie Institution of Washington publication. POTATOES BARLEY 9 10 BARLEY WHEAT GRASS BIG BLUESTEM. ^m ^m Iff' WM 16 FlQ. 42.—Diagram of containers and root development of crops, 1921. Horizontal lines (6 inches apart, except in last two) indicate position of wax seals and double vertical lines position of nutrients. When the containers were filled within 2 inches of the tops, two thin wooden strips, about inches in width and as long as the diameters of the containers, were placed edgewise and partially sunk into the soil so as to prevent the wax seal from covering the area of soil (about inches in width) in which the crops were to be planted. Finally, the wax seal was covered with 2 inches of sand. Next a light-green wooden roof, with sufficient slope to cause the water to run off but with an opening inches wide and as long as the diameter of the. 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, bookyear1922
