. The development of single-germ beet seed. Percentage of single-germ seeds from sifting*. Number of meshes per inch. 1( 14 Percentage of single germs. 3 8. - v- The singles that remained in sieves of 6 and 8 meshes to the inchwere of normal size and well tilled: those that remained in the sieve of10 meshes were small but well rilled: those left in the 12 and 11 meshsieves were to a great extent not filled at all. while others were simply immature flowers, all together, theyconstituted bat thesmall percentage âconsiderably lessthan 8 per cent. Whilewe have no way ofdetermin
. The development of single-germ beet seed. Percentage of single-germ seeds from sifting*. Number of meshes per inch. 1( 14 Percentage of single germs. 3 8. - v- The singles that remained in sieves of 6 and 8 meshes to the inchwere of normal size and well tilled: those that remained in the sieve of10 meshes were small but well rilled: those left in the 12 and 11 meshsieves were to a great extent not filled at all. while others were simply immature flowers, all together, theyconstituted bat thesmall percentage âconsiderably lessthan 8 per cent. Whilewe have no way ofdetermining what bulkof the cleaned seedthese sittings repre-sent, study of seedsobtained from ordi-nary beet plants leadsto the conclusion thatthey do not representmore than one twenty-fifth, or 1 per cent, of single beet flower. A. sepal; B. anther: C. pistil. the original bulk. If this be true, and onan average three seeds from the sittings are equal in weight andbulk to one commercial seed, the following conclusions can be reached:. Percentage of singles in sittings $| i1-Percentage oi singles in commercial seed Average percentage of singles in ordinary seed 1. s4 This is somewhat lower than the percentage of singles on the plantsselected from the held of ordinary seed beets. (See the second columnof Table III. p. 22.) It must be remembered that the i;.77 per centgiven in Table III is the average of singles on the ten best plant- andnot the average of all the plants in the held. THE BEET FLOWER. The beet flower consists of three sets of organ- arranged in threewhorl- (rig. 3). The outer set i- composed of rive green parts, calledsepals (tig. 3. A), which are attached to and form a part of the seed the early stages of the flower, i. before it open-, these livesepals inclose and protect the other part- of the flower (tig. 4). THE BEET FLOWER. 13
Size: 1621px × 1542px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtongovtprin
