. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. PLANT-BREEDING METHODS 427 adapted for more northern localities. It has been found, as would be expected, that in breeding for numerous characters at the same time the recombinations in F^ following of many select sti-ains are so complicated as to render very illusory the idea of reaching definite results by theoretical calculations. But in spite of this difficulty hybridi- zation offers a means of creating new forms which cannot be obtained Pod Concuve iJear Center. Convex Near Poin
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. PLANT-BREEDING METHODS 427 adapted for more northern localities. It has been found, as would be expected, that in breeding for numerous characters at the same time the recombinations in F^ following of many select sti-ains are so complicated as to render very illusory the idea of reaching definite results by theoretical calculations. But in spite of this difficulty hybridi- zation offers a means of creating new forms which cannot be obtained Pod Concuve iJear Center. Convex Near Point Near Center, between i'.oim U Near 8teni Full, Cunslrictcjd Loosely Filled, Crowded with Be:in3 Yuntr. \Double Barrelled f JUnaymmetrlcal bbort Irom forward Center of Tod " Center Line, Altern^„v k^.«^^ Outline Drawing. Checlc outlines which best illustrate the general form and character of pod and also those showing the characteristics of the beans and their arrangement in the pod- ACCESSION Xb. Location of trial Section, row to row, inc. Observer Year SOIL Gravelly, sandy, loamy, PKEVIOUS CKOP FEETILIZEE USED? clayey, mucky wet dry early late well poorly fitted AEEA feet of row plant a to yard feet between rowa sampleB in trial CULTOIIE from seed In place Culti vation frequcDt deep thorough Plants sprayed times withP WEATHER CUNDITIONS hot cold dry INSECT INJURY DISEASE DEYELOPilENT OF PLANTS wet much little none much little none good fair poor . " — -^ ___^ — ,____ ^ —-_ ' —' ^—~-' ~— —- — ~-~^_^—^-^^__,— ^—' Fig. 174.—Reverse of description blank shown in Fig. 173. otherwise. Thus it is an indispensable supplement to the methods of selection and strain-testing. Variety Tests.—The principal purposes of variety testing are first, establishment of varietal tj^pes of field crops and vegetable plants, and second, determination of the best varieties for a given locality. In the establishment of varietal types many difficulties are encounte
Size: 2236px × 1118px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksu, booksubjectplantbreeding
