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"Experientia docet" - Experience is the best teacher

A comparison between female lambs of the Dormer and two synthetic composites with respect to feed intake, growth and efficiency

  • 1993
  • Issue: 1
  • Volume: 23
S.J. Schoeman, R. de Wet and C.A. van der Merwe Page: 4 - 12

Growth-related parameters, such as feed intake, growth rate and feed efficiency were investigated in ewe lambs of two genetically related synthetic lines and the Dorper. Ten ewe lambs in each of the three groups were individually fed in metabolism cages…

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Prediction of the chemical composition and in vitro dry matter digestibility of a number of forages by near infrared reflectance

  • 1993
  • Issue: 1
  • Volume: 23
L.D. Snyman and H.W. Joubert Page: 20 - 23

The chemical composition and in vitro dry matter digestibility of a number of forages, namely lucerne (Medicago sativa), Italian rye grass (Lolium multiflorum), triticale (Triticale hexaploide), oats (Avena sativa), tall fescue (Festuca arundinacea), babala (Penniseturn typhoides), forage sorghum (Sorghum bicolour…

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Direct and maternal additive and heterotic effects in crossbreeding Hereford, Simmentaler and Afrikaner cattle

  • 1993
  • Issue: 3
  • Volume: 23
S.J. Schoeman, J.G.E. van Zyl and R. de Wet Page: 61 - 66

Data from purebred and crossbred cattle, consisting of the Hereford (H), Simmentaler (S) Afrikaner (A) breeds, were analysed to estimate breed additive effects, individual heterotic effects, breed maternal and average maternal heterotic effects. The traits studied were birth mass, weaning…

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Inbreeding in the Elsenburg Dormer sheep stud

  • 1993
  • Issue: 3
  • Volume: 23
J.B. van Wyk, G.J. Erasmus and K.V. Konstantinov Page: 77 - 80

Data of the Elsenburg Dormer sheep stud which was kept closed since its inception, were collected over a period of 50 years (1941-1990). These data were analysed to monitor the increase in actual level of inbreeding and to investigate the…

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Relationship between early growth traits in Elsenburg Dormer sheep stud

  • 1993
  • Issue: 3
  • Volume: 23
J.B. van Wyk,· G.J. Erasmus, K.V. Konstantinov and J. van der Westhuizen Page: 81 - 84

Correlations were estimated from a total of 7740 lamb records, collected from 1943 to 1990, from the progeny of 215 sires of the registered Elsenburg Dormer sheep stud. Phenotypic correlations were generally positive and medium to high except for a…

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