The Kenya milk records, for the period 1975-85 collected from 6 herds, and Zimbabwe milk records, for the period 1979-86 collected from 8 herds, were analysed to compare the Ayrshire and Friesian breed performance in Kenya and the Ho 1stein-Friesian and Jersey breed performance in Zimbabwe, when reared under identical herd conditions.
From the monetary aspects and taking into consideration the metabolic weights and total dry matter intake of these breeds, it appears that, given the same environment, the Friesians are more profitable than the Ayrshires in Kenya and the Jerseys outperform the Ho 1stein-Friesian in Zimbabwe.

E. Collins-Lusweti

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XIV. Dairy cattle genetics and breeding, adaptation and conservation., , 203–206, 1990
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