. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. Depths at Which Plants Absorb Water and Nutrients. 107 for water-content determinations and large composite samples for nitrate determinations were secured at all levels at the time the containers were filled and before the nutrient was added. BARLEY BARLEY POTATOES POTATOES POTATOES. Fig 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
. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. Depths at Which Plants Absorb Water and Nutrients. 107 for water-content determinations and large composite samples for nitrate determinations were secured at all levels at the time the containers were filled and before the nutrient was added. BARLEY BARLEY POTATOES POTATOES POTATOES. Fig 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) m 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 Weaver, John E. (John Ernest), 1884-1966; Jean, Frank Covert, 1880- joint author; Crist, John W. , joint author. Washington, Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcropsan, bookyear1922
