. Bulletin. 1901-13. Agriculture; Agriculture. 12 DEVELOPMENT OF SINGLE-GEKM UEET SEED. Table I. —IWcrntat/f of $in-<jrrm serds from sifting*. Number "f meshes per inch. 6 8 in 12 14 :; The singles that remained in sieves of 6 and 8 meshes to the inch were of normal size and well tilled; those that remained in the sieve of 10 meshes were small but well tilled; those left in the 12 and 14 mesh sieves were to a great extent not tilled at all, while others were simply immature flowers, and, taken all together, they constituted but the small percentage of —considerably less th
. Bulletin. 1901-13. Agriculture; Agriculture. 12 DEVELOPMENT OF SINGLE-GEKM UEET SEED. Table I. —IWcrntat/f of $in-<jrrm serds from sifting*. Number "f meshes per inch. 6 8 in 12 14 :; The singles that remained in sieves of 6 and 8 meshes to the inch were of normal size and well tilled; those that remained in the sieve of 10 meshes were small but well tilled; those left in the 12 and 14 mesh sieves were to a great extent not tilled at all, while others were simply immature flowers, and, taken all together, they constituted but the small percentage of —considerably less than S pei-cent. "While we have no way of determining what hulk of the cleaned seed these siftings repre- sent, study of seeds obtained from ordi- nary beet plants leads to the conclusion that they do not represent more than one twenty- fifth, or 1 per cent, of the original bulk. If this be true, and on an average three seeds from the siftings are equal in weight and bulk to one commercial seed, the following conclusions can be reached: Percentage of singles in siftings (25-f-3) Percentage of singles in commercial seed . !'ii Average percentage of singles in ordinary seed This is somewhat lower than the percentage of singles on the plants selected from the field of ordinary seed beets. (See the second column of Table III, p. 22.) It must be remembered that the per cent given in Table III is the average of singles on the ten best plants and not the average of all the plants in the field. THE BEET FLOWER. The beet flower consists of three sets of organs arranged in three whorls (fig. 3). The outer set is composed of five green parts, called sepals (tig. 3, A), which are attached to and form a part of the seed coat. In the early stages of the flower, i. before it opens, these five sepals inclose and protect the other parts of the flower (tig. 1).. Fig. 3.—A single beet flower. A, sepal; B, anther; C, Please note that these images are e
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