"Experientia docet" - Experience is the best teacher
Urea space versus tritiated water space as an in vivo predictor of body water and body fat
The urea dilution technique for the determination of body water and body fat in vivo was compared with the tritiated water dilution technique with respect to accuracy. ease of determination, costs, and application possibilities. Nineteen sheep were used in the…
Die invloed van die melkinterval op melkproduksie
The influence of milking interval on milk production The influence of milking intervals of 12, 16, 20 and 24 hours on milk production was studied in 24 Friesian cows for an experimental period of 60 days. Milk, fat and protein…
Time of ovulation in lactating karakul ewes following synchronization of oestrus during the breeding season
120 Lactating Karakul ewes were randomly divided into 12 equal groups. Two main groups nursed lambs until medroxiprogesterone acetate impregnated sponges (Repromap, Upjohn) were inserted at 28, 38 and 48 days post partum (non-lactating) or until 90 days post partum…
A generalisation of an approximate method to calculate inbreeding coefficients
The approximate method for calculating coefficients of inbreeding from pedigrees presented by Wright & McPhee (1925). Is generalized to accommodate different methods of sampling random lines of descent.
The inheritance of breed characteristics of the Afrikaner cattle breed
The inheritance and interassociation of the breed characteristics of 383 Afrikaner cattle were studied. The estimates of heritabilities of the different breed characteristics were as follows: 0,187 for quality; 0,203 for middle quarters; 0,281 for front quarters; 0,440 for head…
The microbiology of South African dried sausage
Thirty dried sausage samples were examined microbiologically and physico-chemically. Ten specific organisms or groups of organisms were quantitatively determined and the presence of Salmonella only qualitatively. Large variations in the quality of the samples were found and are sufficiently demonstrated…
