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Abstract

26 pairs of monozygotic twin heifers from dairy herds in Germany [German Red Pied and German Black Pied?] were divided into 3 groups and observed over the following 3 periods [date and location not given]: aged 4-13 or 4-15 months; aged 4-10 or 4.0-11.5 months; and aged 7-10 or 7-11 months....

Author(s)
Andreae, U.; Müller, C.
Citation
Landbauforschung Völkenrode, 1997, 47, 4, pp 147-158
Abstract

The development of A.I. from 1963 to 1966 is described. In this period, the percentage of cows inseminated rose from 81.1 to 89.1. In 1966, approx. 2368 million first inseminations were carried out with semen from 1766 bulls. The 90-day N.R. rate averaged 68.2%. The milk yield of cows sired by 1441 ...

Author(s)
Pilz, K.
Citation
Monatshefte fur Veterinarmedizin, 1967, 22, pp 681-684
Abstract

The detailed data on many aspects of dairy cattle breeding and milk production in W. Germany presented in this monograph include the following information. In 1970 there were 2 185 784 milk recorded cows with a mean milk yield of 4406 kg and a milk fat content of 3.93%, and 3666216 not recorded...

Publisher
4403 Hiltrup, W. Germany: Landwirtschaftsverlag GmbH,
Citation
Rinderzucht Milchleistungsprufung Besa-mung in der Bundesrepublik Deutschland. Ergeb-nisse 1970., 1971, pp 134 pp.