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Article

Effect of age at first calving on some productive and longevity traits in Iranian Holsteins of the Isfahan province.

Journal of dairy science - 1 Jul 2004

Nilforooshan M A, Edriss M A

Abstract excerpt

Production and pedigree data of Iranian Holsteins were collected from 1991 to the end of 2001 on 45 herds in Isfahan province. Data on culled cows (birth and culling dates) were used to estimate the effect of age at first calving on total lifetime and productive life; and the effect of age at first calving on first-lactation yields was estimated from corrected (2x 305 d) first-lactation records of 12,082 dairy...

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Identifiers

PMID: 15328226
DOI: 10.3168/jds.S0022-0302(04)70032-6

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 5 Sept 2026. Manifest publication-graph-cohort-2026-09-05.1.

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