M. KHALAFALLA

Animal Production Research Adminstration, Kuku. P. O. Box 89, Industrial Area, Khartoum North. Sudan.

Buttana cattle is a local type of the short-homed zebu indigenous to Northern Sudan. The available data on its productive and reproductive performance (Alim, 1962, Khalifa and Shafei, 1968 and Khalafalla and Khalifa, 1985) are rather limited. The present work presents information on the length of dry period in a herd of Butana cattle. The data used in this study were taken from records of Atbara Dairy Research Station in the Nile Province, in Northern Sudan. Management of the herd and objectives of the station have been reported by Khalafalla and Khalifa (1985).

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