. Breeding crop plants. Plant breeding. FLAX AND TOBACCO 171 mad? ^ produce any quantity of seed ranging from a single pod up to a large inflorescence by appropriate regulation of the quantity of soil in which the plant ; Plants grown in 12-quart buckets produced large amounts of seed when the length of day was shortened by placing the plants in the dark chamber for a part of the normal day, A control series left out of doors during the experiment began to show flower heads about the middle of August (see Fig. 38). Plants exposed to seven hours of light daily produced large quanti-.
. Breeding crop plants. Plant breeding. FLAX AND TOBACCO 171 mad? ^ produce any quantity of seed ranging from a single pod up to a large inflorescence by appropriate regulation of the quantity of soil in which the plant ; Plants grown in 12-quart buckets produced large amounts of seed when the length of day was shortened by placing the plants in the dark chamber for a part of the normal day, A control series left out of doors during the experiment began to show flower heads about the middle of August (see Fig. 38). Plants exposed to seven hours of light daily produced large quanti-. FiG. 38.—Control series of Maryland Mammoth tobacco in twelve-quart buckets left out of doors during the experiment. Flower buds just beginning to show when photographed, August 19, 1919. {Courtesy of Garner.) ties of seed while those exposed to twelve hours of light daily grew larger but were later in blossoming (see Fig. 39). In southern Florida during the ordinary winter months, the Maryland Mammoth behaves as ordinary tobacco, showing no evidence of its tall late habit. Thus quantities of seed could easily be produced under these conditions, Allard (1919) crossed normal varieties with the Mammoth type. The F\ averaged somewhat higher in leaf number than 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 Hayes, Herbert Kendall, b. 1884; Garber, Ralph John, b. 1890. New York [etc. ] : McGraw-Hill book company, inc.
Size: 1710px × 1462px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectplantbr, bookyear1921
