Hemingway, J.S.2015-10-012015-10-011956/1957Hemingway, J. S. (1956). Effects of Population Density on Yield of Maize. EAAFRO Journal. 22, p. 199-2030012-8325http://kalroerepository.kalro.org/handle/0/13626The name "Katumbili" is used for white seeded maize grown over wide areas of East Africa. In its crude form, as grown largely in native cultivation, the stock contains a very great mixture of characters: dent- and flint seeded types, tall, intermediate and dwarf plants, variations of ear number and row number on the ear, a range of growth periods, other colored seeds, etc. Attempts have been made in many areas, particularly on experimental farms, to "clean up" this mixture by mass-selection and other simple techniques, in order to standardize strains which conform to local necessities (length of season, etc.), and preferences (dent or flint, "sugary" or "starchy" seed, etc.). As a consequence of these attempts a number of fairly distinct strains have been named, and these are in use in breeding programmes and in the East African co-operative maize variety trials currently being run on a number of experimental farms. Examples of such strains are "Katumbili wanza", "Katumbili Namulonge", "Katumbili Kilosa" and "Katumbili Nachingwea".enhttp://creativecommons.org/licenses/by/3.0/Journal ContributionDensityYieldsMaizeCultivation