Abstract
THE lactation curve in cattle has been represented by the function where yn is the average daily yield in the nth week and A, b and c are constants. I have previously1 suggested a measure of persistency (the extent to which peak yield is maintained) given by which was related to expected total yield (Y) by Y = AeS.
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Wood, P. D. P., Nature, 216, 164 (1967).
Wood, P. D. P., Stat., 17, 3 (1967).
Johanssen, I., Genetic Aspects of Dairy Cattle Breeding (University of Illinois, 1961).
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WOOD, P. Factors affecting Persistency of Lactation in Cattle. Nature 218, 894 (1968). https://doi.org/10.1038/218894a0
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DOI: https://doi.org/10.1038/218894a0
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