Browsing South African National Veterinary Repository by Author "De Vos, W.H."

Browsing South African National Veterinary Repository by Author "De Vos, W.H."

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  • The influence of excess fluorine intake in the drinking water on reproductive efficiency in bovines 
    Van Rensburg, S.W.J.; De Vos, W.H.; Jansen, B.C. (Pretoria : The Government Printer, 1966)
    Fifty Afrikaner heifers maintained under ordinary veld conditions were divided into five groups. Each group received 5, 8 or 12 ppm fluorine in the drinking water and in addition three groups also received defluorinated ...
  • Ovulatory failure in bovines 
    Van Rensburg, S.W.J.; De Vos, W.H.; Jansen, B.C. (Pretoria : Government Printer, 1962)
    Good progress has been made during the past two decades in improving the diagnostic methods for detecting the various types of bovine infertility. Nevertheless, the sterility worker is still frequently confronted with cows ...
  • The significance of the cytoplasmic droplet in the disintegration of semen in Guernsey bulls 
    Van Rensburg, S.W.J.; De Vos, W.H.; Van Rensburg, S.J.; Jansen, B.C. (Pretoria : The Government Printer, 1966)
    The occurrence of sperm disintegration in Guernsey bulls in South Africa was investigated in thirteen animals that were either sterile or displayed low fertility. One of these was kept under observation and subjected to ...