42. The Yield and Composition of Milk with Special Reference to the Influence of Climatic Conditions and other Factors

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Abstract
This article records the preliminary results of an investigation of some of the causes of the variations in the yield and composition of milk. The influence of the season of the year, and the influence of climatic conditions on the average yield and composition of the milk of a herd, are discussed. The relationships between the data are studied by means of simple corre-lation and also by means of partial correlation. The temperatures used are the average temperatures for the periods between the milkings. Thus the day-temperature is the average temperature of the interval between the morning and evening milking, and the night temperature is the average temperature of the interval between the evening milking and the next morning milking. The daily temperature is the average of these two temperatures.

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