Selection of carrots for carotene content

Banga, O., Taproot-problems in the breeding of root vegetables. Euphytica 3 (1954): 20–27. Banga, O. and J. W.deBruyn, Selection of carrots for carotene content. Euphytica 3 (1954): 203–211. Barness, W. C., Effects of some environmental factors on growth and colour of carrots. Cornell Un Agr. Exp. Sta. Memoir 186 (1936): 1–36. Booth, V. H. and S. O. S.Dark, The influence of environment and maturity on total carotenoids in carrots. J. of Agr. Sci. 39 (1949): 226–236. Bremer, A. H., Temperatur og plantevekst III Gulrot (Temperature and plant growth III Carrot). Meldinger Fra Norges Landbrukshøiskole 11 (1931): 55–100. Hansen, E., Variations of the carotene content of carrots. Proc. Am. Soc. of Hort. Sci. 46 (1945): 355–358.