Production Characteristics and Management of Dairy Cattle in Ethiopia

Wells, Micah; Wagner, D. G.; Holland, G. L.; Stringer, Bruce; Wondafrash, Teshome

doi:10.1080/00128325.1969.11662307

East African Agricultural and Forestry Journal

1969

DOI: 10.1080/00128325.1969.11662307

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Production Characteristics and Management of Dairy Cattle in Ethiopia

Micah Wells¹,

D. G. Wagner²,

G. L. Holland³

et al.

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1973

1980

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Some factors Influencing intercalving periods of imported and home-reared Holstein cattle in western Nigeria

Adeneye

Bamiduro

1980

J. Agric. Sci.

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The average of 160 intercalving periods of 47 imported and 33 home-reared purebred Holsteins in western Nigeria during 1967-75 was 628( + 45) days. The probable effects of seven variables including origin of cow, sex of calf, season of calving, age of cow at calving, parity, year of calving and calf birth weight were investigated through an intra-class linear regression model in which the first three factors were treated as qualitative and the last four as quantitative factors. Origin of cow, sex of calf and season of calving did not significantly affect calving interval. Effects of age at calving, parity, year of calving and calf birth weight were highly significant (P < 0-01) but individual effects adjusted for others were not quite significant. These four quantitative factors were, however, highly interrelated; simple correlations which varied between 0-33 and 0-86 were highly significant. Interactions between the two sets of factors were negligible.

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Some factors Influencing intercalving periods of imported and home-reared Holstein cattle in western Nigeria

Adeneye

Bamiduro

1980

J. Agric. Sci.

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Dairying in Zambia: II. Reproductive Efficiency in Relation to Season and Parity in Dairy Cows

Igboeli

1973

East African Agricultural and Forestry Journal

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Production Characteristics and Management of Dairy Cattle in Ethiopia

Cited by 2 publications

References 4 publications

Some factors Influencing intercalving periods of imported and home-reared Holstein cattle in western Nigeria

Some factors Influencing intercalving periods of imported and home-reared Holstein cattle in western Nigeria

Dairying in Zambia: II. Reproductive Efficiency in Relation to Season and Parity in Dairy Cows

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