Biological factors that influence the quality of mohair. The influence of the most desirable properties (fineness, length, style, character and lustre) on the price of mohair is discussed briefly. Biological factors such as age, nutrition, genetics, sex, and stress and…
The effect of protein, energy and phosphorus supplements, fed individually or in various combinations, on roughage intake and livemass change was measured in a 2 x 2 x 2 factorial arrangement of treatments. The experiment was conducted under controlled conditions…
The effect of physical form, moisture level and prolonged treatment period on the ammoniation of wheat straw using 75 9 urea per kg wheat straw was investigated in a 2 x 3 x 6 factorial experiment. Physical form was represented…
The voluntary feed intake, body composition and efficiency (ME intake/energy retention) of 10 Dorper x Merino and 10 Afrino x Merino lambs were studied. The age of experimental animals ranged from weaning at approximately 120 days, to about 240 days…
The effect of diet protein and energy levels on the growth performance and feather production of slaughter ostriches under feedlot conditions. Lucerne , maize and ostrich carcass meal were used to formulate nine diets supplying three protein levels (14,…
The optimal day of milk sampling for pregnancy diagnosis by milk progesterone quantitation was determined as well as the diagnostic efficiency of the test for days 14 - 24 post insemination in dairy cattle. The results show that on days…
Factors that influence mortality amongst lambs in the Elsenburg Dormer and SA Mutton Merino flocks. Data related to 1 852 SA Mutton Merino and Dormer lambs born in the Elsenburg flocks, during the period 1978 - 1981 inclusive, were analysed…
Shorthorn and Bonsmara type beef heifers from two breeding seasons were allocated to a high (H), medium (M) and low (L) level of nutrition after weaning at 7 months of age. The feeding levels were applied for 145 days (1972…
Two experiments were conducted to measure the influence of trough space (170 mm, 350 mm and 700 mm/animal) and pen area (5,5 m2, 11 m2 and 22 m2/animal) on feedlot performance. There was no advantage in allowing more than 170…
The purpose of this trial was to evaluate two methods of roughage treatment and two levels of treated roughage in complete rations for weaner lambs. A 3 x 2 factorial arrangement of treatments was used. Untreated, sodium hydroxide-treated, and steam-treated…
The influence of weaning age on the efficiency of an accelerated mating frequency with sheep. One hundred late pregnant South African Mutton Merino ewes were divided into two comparable groups (an early and a late-weaning group) of 50 animals each…
Phenotypic and genetic parameters in a commercial Merino flock. A study was made of a commercial Merino flock on the farm Rietfontein near Soutpan in the central Orange Free State . The progeny of 43 rams and 542 ewes were…
A study was made of the incidence of clinical and subclinical mastitis in the Cedara dairy herd consisting of 110 Friesland cows. It involved an analysis of 103 cases of clinical mastitis which occurred over 4 years and the random…
Mycotoxins, and more specifically aflatoxins, have been found in samples of feed, litter, and liver tissue obtained from broiler chicken houses that had a high incidence of ascites and were also associated with low growth rates. It is suggested that…
The objective of this study was to investigate the effects of different dietary lipid sources and inclusion levels on lipid oxidation of thigh and breast muscle of male broilers. Eight isoenergetic (15.12 MJ AME/kg DM) and isonitrogenous (222.8 CP/kg DM)…
The aim of this study was to compare testosterone concentration, body weight, scrotal circumference and age to penis detachment from days 30 to 240 in young Boer goat males (n = 22) born during the dry (n = 11) and…
The aim of this study was to monitor early gestation in Santa Ines ewes by ultrasound in order to determine embryo and foetal loss, and to identify foetal sex. Ewes (n = 132) were submitted to controlled natural mating. For…
This paper describes a few important aspects of the process that should be followed before an experiment is conducted. One should start by defining the hypothesis or theory to be tested, which gives a good indication of the way in…
Two experiments were conducted, (1) to determine the effect of the polyphenol content of sorghum on nitrogen and energy digestibility and (2)to compare a high polyphenol content class KF sorghum cultivar (BPS)and a low polyphenol content class KM cultivar (NS)…
Diets containing three levels of fish meal (4, 6 and 8 %), each supplemented with synthetic lysine at four lysine levels (0,7; 0,8; 0,9 and 1,0 %) were formulated to contain 12,65MJ of ME per kilogram air-dry feed and individually…
