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"Experientia docet" - Experience is the best teacher

Voorspeense groei van Bonsmarakalwers onder verskillende agro-ekologiese toestande en faktore wat dit beïnvloed (Kort mededelin

  • 1987
  • Issue: 4
  • Volume: 17
J.G.E. van Zyl, H.A.W. Venter & H.T. Groeneveld Page: 185 - 187

Factors influencing birth mass, actual weaning mass and corrected weaning mass were investigated. Herd, year of birth, sex of calf and season of birth as well as interactions between main effects influenced parameters significantly (P<0,05). Spring and winter calves attained…

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Occurrence of oestrus in the Boer goat doe (Short communication)

  • 1987
  • Issue: 3
  • Volume: 17
J.P.C. Greyling & C.H. van Niekerk Page: 147 - 149

Scrotal circumference in young beef bulls:  Relationships to growth traits The natural occurrence of oestrus in Boer goat does was recorded for the period 1980 - 1982. Although periods of complete anoestrus were never observed, it would appear that the…

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The genetic structure of the Jersey breed in South Africa

  • 1987
  • Issue: 4
  • Volume: 17
J.S. Allan Page: 153 - 156

An analysis of the pedigrees of a random sample of 100 South African-bred first-calf Jersey heifers registered in 1985 showed that most breeders have concentrated on a closely interrelated group of Marlu animals and their descendants. Of the 17 young…

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Nuwe ontwikkelings in pluimveevoeding

  • 1987
  • Issue: 4
  • Volume: 17
G.A. Smith & K. de Beer Page: 157 - 167

  A review is given of developments in poultry nutrition, with specific reference to aspects concerning the broiler industry. The role of fat in feeds and its influence on body composition are discussed. Attention is paid to the importance of…

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The relationship between testis size and stimulated plasma testosterone concentrations and its influence on mating performance i

  • 1987
  • Issue: 2
  • Volume: 17
S.J. Schoeman, C. Maree & G.C. Combrink Page: 63 - 69

Testis size, stimulated testosterone concentrations and mating performance (serving capacity, libido score and serve : mount ratio) of 14 Dorper rams were measured in the breeding season (March) in order to determine the influence of testis size and testosterone concentration…

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