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The study was conducted to estimate model parameters of Incomplete Gamma (IG) (b=1) and Inverse Polynomial ¢P) functions of a lactation curve and the models lactation yield prediction potential based on milk data from Bako Agricultural Research centre and Debre Zeit Research Station. The models w...


Gebreyohannes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Estimated model parameters of incomplete gamma and inverse polynomial functions and comparison of the models lactation yield prediction potential in Zebu and crossbred cattle]Estimated model parameters of incomplete gamma and inverse polynomial functions and comparison of the models lactation yield prediction potential in Zebu and crossbred cattle

The study was conducted to evaluate the reproduction efficiency of zebu and crossbred cows measured by the inter-estrus and inter-service intervals using data from Bako Agricultural Research Center. The overall mean inter-estrus and inter-service intervals were 44.3 t 0.85 and 49.1 t 1.24 days, r...


Gebreyohannes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Reproduction efficiency of Zebu and crossbred cows as measured by the inter-estrus and inter-service intervals at Bako]Reproduction efficiency of Zebu and crossbred cows as measured by the inter-estrus and inter-service intervals at Bako

Five lactation curve models were compared for their fitness to milk data of indigenous and crossbred cows using data from Bako Agricultural Research Center and Debre Zeit Research Station. The fit of the models was compared using the model Rz value. The overall mean RZ value was 81.5 t 0.12% and ...


Gebreyohannes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Modeling lactation curve and comparison of models fitness to different lactation data of indigenous and crossbred cows]Modeling lactation curve and comparison of models fitness to different lactation data of indigenous and crossbred cows

Overall performance of smallholder crossbred dairy herds was assessed by administering semi-structured questionnaires on 20 sample herds with crossbred and indigenous cattle in Degem. Reported average lactations yields of crossbreds were at least five times greater than that for indigenous cows; ...


Dekeba, A.Ayalew, W.Hegde, B.P.[Observations on the performance of crossbred dairy cattle in smallholder herds in Degem District, Ethiopia]Observations on the performance of crossbred dairy cattle in smallholder herds in Degem District, Ethiopia

Postpartum body weight dynamics of zebu and crossbred cows in relation to postpartum reproduction was studied using data from the Bako Agricultural Research Centre. Body weight at calving, first postpartum oestrus, first service and conception were analysed using the General Linear Model which in...


Gebreyohannes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Body weight dynamics of Zebu and crossbred cows in relation to postpartum reproduction under sub humid climate of Bako]Body weight dynamics of Zebu and crossbred cows in relation to postpartum reproduction under sub humid climate of Bako

Persistency of lactation in indigenous and crossbred cows was studied using milk data collected at Bako Agricultural Research Centre. Persistency was measured using three methods vis a vis as the ratios of milk yield during the second (P2:1) and third (P3:1) 100 days of lactation to milk yield du...


Gebreyohanes, G.Tegegne, AzageDiedhiou, M.L.Hegde, B.P.[Persistency of lactation and comparison of different persistency measures in indigenous and crossbred cows at Bako, Ethiopia]Persistency of lactation and comparison of different persistency measures in indigenous and crossbred cows at Bako, Ethiopia

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