Published online by Cambridge University Press: 27 March 2009
The respective effect of the period of lactation and the age of the cow on the yield and quality of the milk have previously been studied separately (see J. Agric. Sci. 17, PtI, p. 118, “The Influence of the Stage of Lactation and the Breed of the Cow on the Yield and Quality of the Milk,” and 17, Pt III, p. 420, “The Influence of the Age of the Cow on the Yield and Quality of the Milk”), and an analysis of the data has now been made with regard to the joint influence of these factors.