The possible use of sorghum hay in the production of milk by high and low yielding Friesland cows and firstcalf heifers was investigated and its influence on milk composition was determined. The animals were divided into four production groups, and…
An experiment was conducted (1) to determine the effect of formaldehyde treatment on the protein digestibility, nitrogen retention and energy digestibility of birdproof grain sorghum, and (2) to evaluate the effect of treated grain, when used as a grain component…
Five diets with equivalent lysine (0,73 %) and digestible energy (13 MJ/kg) contents on an "as is" basis containing distillers dried grains at levels ranging from 15 to 35 percent were fed to 5 groups of 5 landrace x Large…
Two diets containing respectively 14 and 16 percent crude protein were fed either wet or dry to 80 Landrace x Large White cross bred barrows. Live mass gain, carcass growth, deposition rates of the different chemical carcass components and carcass…
The importance of sufficient vitamin A in the diet of cattle has been adequately substantiated (Rosenberger, 1970; Bauernfeind & Marusich, 1971; Thompson 1975; Lotthammer, 1978). It has been claimed that under semi-arid conditions (winter range) where no green pasture is…
The application of an allometric-autoregressive model for the quantification of growth and efficiency of feed utilization for purposes of selection for efficiency is discussed. To maturity rat growth and efficiency can be divided into 3 growth phases by this model.…
The effect of different production traits on the income of Angora goat farming was investigated. From the few estimates available in the literature, it was concluded that the heritability of production traits of the Angora is of the order of…
The control of oestrus and ovulation in sheep has been researched for more than 3 decades and still continues. Both in South Africa and abroad, much research has been done on the use of intravaginal progestagen sponges alone (Robinson, 1967;…
Keywords: Technique, infusion, sheep
It is shown that a singular second moment matrix with rank one may induce properties of a control system in a first order autoregressive time series. A growth law is associated with the non-unity root of the recursive system, so…
The allometric-autoregressive quantification of growth and efficiency divides rat growth into 3 different physiological phases. Significant differences between families for some of these parameters existed. Consequently, heritabilities and, phenotypic and genetic correlations of the different parameters were estimated. Significant heritabilities…
Heat damaged fish meal was used to demonstrate the ability of a published bioassay method to discern availability differences resulting from heat treatment. The importance of standardising the test diets was shown and available lysine content of fish meal and…
A 2 by 4 factorial experiment was performed to investigate the influence of ascorbic acid and various dietary energy concentrations on bone development. Two groups of 12 broiler chickens were allocated to one of each of the following dietary treatments:…
An investigation was conducted into the effects of sodium hydroxide treated maize straw on the water intake of milch goats when fed alone or in a complete mixed diet. Dry matter intake was more closely related to water intake than…
