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…
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…
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…
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 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…
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…
The amino acid content of grains and animal products was compared with whole egg, a protein source of high biological value. Groups of protein sources can be selected on the basis of this comparison, which are complementary, and can as…
Twenty eight Friesland bull calves were used in a comparative slaughter experiment to determine the influence of high energy diets (whole-milk and cream) on the body composition of preruminant calves. Results indicated an increase in total DM, energy, nitrogen and…
Utilisation of rations containing poultry manure as a protein source: Poultry manure (22,5 % crude protein on dry basis) obtained from a battery operation was included in rations consisting of lucerne hay, maize meal and molasses. The control ration contained…
Different dosage levels of pregnant mare serum gonadotrophin (PMSG) were applied in conjunction with medroxyprogesterone acetate impregnated intravaginal sponges at different times in relation to sponge removal The object of the study was to find the most economical dose level…
Merino, Karakul, Dorper, Blackhead Persian and Namaqua Arikaner ewes were tested for oestrus twice daily over a period of six years to evaluate their reproductive patterns under the semi-arid conditions of the North Western Cape. It was found that the…
Observations on the occurrence of oestrus in Africander and Jersey cattle under extensive conditions in the Northern Cape Data concerning the occurrence of oestrus in Africander and Jersey cattle under extensive conditions were obtained from a crossbreeding program at Vaalharts…
The chemical composition of milk of Afrikaner cows kept under ranching conditions of feeding and management were determined. –The contents of non-casein and globulin nitrogen as well as phosphorus and calcium were statistically significantly influenced by age. Stage of lactation…
Poultry manure, potentially suitable as a ruminant f'eedstuff, was obtained from various sources Samples consisted of pure excreta from birds kept in batteries, broiler excreta on deep litter systems and pullet and breeder excreta on deep litter systems. Large variations…
