G. H. Bowman's scientific contributions

Publications (3)

Article
Lactation records completed by 104 Holstein and 51 Ayrshire cows in the University of Guelph herd, in 1955 to 1965 inclusive, revealed a steady improvement in each breed for milk and fat yield. Maximum likelihood constants for environmental change indicated an annual increase of 3.9 and 4.0 breed age-class average (BCA) points for milk, and 2.2 and...
Article
A study of first-lactation records, collected under Canadian Record of Performance and involving 12,815 Holstein–Friesian heifers by A.I. (artificial insemination) sires, and 13,543 Holstein–Friesian heifers by non-A.I. sires, within the same herds and season, revealed a superiority in average breeding value of 4.62 ± 0.48 B.C.A. (breed class avera...
Article
Production records from the Ontario Agricultural College sheep flock collected during the years 1950 to 1960 inclusive were analyzed to determine the effects of breeds (Suffolk, Hampshire, and Southdown), age of dam, year, and type of birth and rearing on three production traits (birth weight, weaning weight, and first fleece weight).Suffolks were...

Citations

... Bowman ( 1966) , after reviewing the literature , suggests a need for further evaluation of pure breeds. Several studies have compared limited numbers of pure breeds (King and Young, 1955; Neville, Chapman and Pope, 1958; Sidwell, Everson and Terrill, 1964; Vesely and Peters, 1964; Lambe, Bowman and Rennie, 1965). The black faced, medium wool breeds similar to or including the Suffolk and Hampshire have generally been superior in rate of growth to the other breeds compared in these studies. ...