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Effect of age at first calving on some economic traits of Holstein Friesian x Deoni halfbreds


, : Effect of age at first calving on some economic traits of Holstein Friesian x Deoni halfbreds. Indian Journal of Animal Research 35(2): 150-152

During this study data were collected from 195 Holstein-Friesian x Deoni crossbred (F1) progeny over a period of 21 years (1974-1994). From the 195 crossbred females, 639 lactations were considered for evaluation. The data generated was divided into seven groups from G1 to G7 on the basis of age at first calving (AFC), along with the corresponding groupwise distribution for milk yield (MY), service period (SP) and calving interval period (ICP) for analysis.

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