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Effects of age at first calving, gestation length and dry period on milk yield in a Gyr herd
(Revista Brasileira de Genética, 1983-01-01) [Artigo]
Relationships of several reproductve traits and milk yield were studied in 716 Gyr cows at Sant'Ana da Serra farm, Mococa, State of São Paulo, a humid tropical climate region. Mean age at first calving was 49.8 +/- 0.4 ...