. Design and operation of a carbon-14 biosynthesis chamber. Carbon; Growth (Plants); Growth cabinets and rooms. Figure 12 —Carbon-14 labeled soybean plants approach- Figure 13.—Carbon-14 labeled soybean plants approach- ing blossoming, growing in the biosynthesis chamber. ing maturity, growing in the biosynthesis chamber. Figures 11, 12, and 13 show carbon-14 tagged soybean plants growing in the biosynthesis cham- ber and the excellent growth that was obtained. Growth of Corn Two crops of corn were grown. The first was growTn about 2 months without radioactivity to determine optimum conditions
. Design and operation of a carbon-14 biosynthesis chamber. Carbon; Growth (Plants); Growth cabinets and rooms. Figure 12 —Carbon-14 labeled soybean plants approach- Figure 13.—Carbon-14 labeled soybean plants approach- ing blossoming, growing in the biosynthesis chamber. ing maturity, growing in the biosynthesis chamber. Figures 11, 12, and 13 show carbon-14 tagged soybean plants growing in the biosynthesis cham- ber and the excellent growth that was obtained. Growth of Corn Two crops of corn were grown. The first was growTn about 2 months without radioactivity to determine optimum conditions, and the second crop was grown to maturity with carbon-14. The corn was harvested at two stages of maturity—at 50 days when the first tassels appeared and at 93 days when the corn was mature. Figure 14 shows corn at the silking stage growing in the chamber. The temperature was maintained at 75° F. ±°. Daylength was 16 hours for the first 73 days, then it was reduced to 14 hours for the re- mainder of the time. Special precautions had to be taken in harvest- ing the radioactive corn. A mass of pollen was produced and scattered throughout the inside of the chamber. Protective clothing was worn to prevent contamination by the pollen. The corn tassels were removed and discarded because of the pollen and its tendency to scatter. Corn yields by fractions of the plant were about as follows: ma- ture corn leaves 150 grams, mature cornstalks 150 grams, mature corn on the cob 300 grams, and mature roots 50 grams. Young plants harvested at early tasseling (or 50 days) produced about 150 grams total top weight. Growth of Wheat The growth of the wheat crop was only par- tially successful because of nutrient balance prob- lems. Both Chel 138 and ferric chloride were 13 / • •. 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 t
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Keywords: ., bookauthorunitedstatesdepartmentofagriculture, bookcentury1900
