Calving age Archives

Derivation of standard lactation curves for South African dairy cows

2003
Issue: 2
Volume: 33

B.E. Mostert, H.E. Theron and F.H.J. Kanfer Page: 70 - 77

2024-10-10
flickerleap

Standard Lactation Curves were derived for South African Holstein and Jersey cows, using twenty herd -, eighteen age - and six season classes. Six herd classes were below and 13 above the average production level for both breeds. A standard…

1994
Issue: 1
Volume: 24

E.E. Lademann and S.J. Schoeman Page: 30 - 33

2024-10-10
flickerleap

Factors influencing the recalving rate of 2 165 lactating beef cows of four pure breeds (Afrikaner, Hereford, Bonsmara and Simmentaler) and three cross-bred types were investigated on the Mara Research Station between 1972 and 1982. Average recalving rate was 88.3%.…