E.A. Abdalla, A.M. Nasr, A.M. Khalafalla and S.A. El
Shafie.

Animal ProductionResearchiScation, Kau” .0. Box 89, Industrial area_.,
Khartoum North.

SUMMARY

The mean lactation milk yield for the Kenana and Butana herds were 2136±168 kg and 1807 ± 592 kg produced in a mean lactation period of 283± 40 days and 283 ± 57 days respectively. In both herds the maximum lactation milk yield was attained in the third lactation. The maximum lactation milk yield was attained by Kenana cows 61/2 – 712 years of age and Butana cows 512-61/2 years of age.

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