Fermentation characteristics and chemical composition of silage made from different ratios of cattle manure and maize residues were investigated. Manure (fresh) obtained from steers fed on a high concentrate diet was ensiled on a laboratory scale with maize…
Maize silage is relatively high in energy but low in protein for the normal lactational requirements of dairy cows. Three trials were conducted to compare the use of urea as opposed to natural protein supplements in balancing the…
Skin and wool samples of fully grown white-wool led rams of 10 different sheep breeds were investigated. An index was constructed according to which the breeds could be classified into three groups, taking 11 characteristics into…
Pregnant, adult Angora ewes, supplemented with either 0, 200, 400 or 600 9 of alkali-ionophore treated whole maize per ewe per day were kept on Atriplex nummularia pasture for the entire gestational period. Changes in live bodymass, reproductive…
The relationship between 18-month mating mass and average lifetime conceptions/mating (Ec/Em), lambs born/conception (Lb/Ec), lambs born/mating(Lb/Em), preweaning mortalities/Iamb born (Ld/Lb) and lambs weaned/mating (Lw/Em) was investigated with data from 1222 Merino ewes available for at least…
Correlations between eight wool characteristics as well as bodymass were calculated for the Dohne Merino. Data originated from 320 ewes present in the development project on this breed at the Agricultural Research Station, Dohne.
Age had a significant (P ≤0,05) influence on greasy fleece mass and clean fleece mass. The staple length, fibre density and bodymas≤s were influenced highly significantly (P ≤5 0,01). Generation number had a significant (P ≤…
Significant changes have occurred in the beef cattle industry in the past few decades. Many of these changes have occurred because cattlemen have applied information provided by animal scientists. Some of these changes are crossbreeding, selection, meeting nutrient requirements of…
The profitability of semi-extensive beef production is discussed on the basis of information collected over a 4-year period from 23 farmers from northern Natal who participated in the mail-in record system. Throughout the analysis, the performance of the group average…
Use of forage analyses and the three dairy diet formulation programs has assisted Wisconsin dairy farmers to make greater progress toward highly competitive, profitable dairying. Acid· detergent fibre (ADF) has proven very satisfactory in…
Small stock production in South Africa is practised under a variety of conditions, each of which demands specific management inputs, disease control programmes, specific types of animals, and economic considerations. Improved small stock production involves close cooperation between the animal…
In this article progress attributable to genetic selection in the poultry industry is discussed in three sections: genetic progress in broilers and broiler breeders, in laying hens, and in disease resistance. Selection methods are evaluated and future objectives are suggested…
In spite of the obvious interdependence of animals and grasslands, both education and research in South Africa have been largely intra- rather than interdisciplinary. There are a number of possible reasons for this. Universities find it difficult to train prospective…
A study was undertaken to determine the relationship between the amino acid and crude protein content of maize using samples of yellow maize from the four main maize-producing areas of South Africa . After determining moisture, crude…
Two types of lucerne LPC were prepared by either adding the juice to hot water (85 °C) or by injecting steam until the juice reached a temperature of 85 °C after which the coagulum was freeze-dried. The resulting…
The administration of different doses (62,5; 125 or 250 μg per injection) of a prostaglandin analogue (cloprostenol) 14 days apart (in the double injection regime), proved that oestrus can be synchronized very efficiently in the Boer…
Forty-eight Sussex male calves were allotted at birth to the following three treatments: (i) castrated within 24 h after birth with elastrator rings and (ii) and (iii) castrated at 3 and 6 months using a burdizzo. Bodymass was…
Sixty Merino lambs were randomly allotted to one of six feeding levels. The feeding levels were: ad libitum (control) and 0,82; 0,72; 0,65; 0,55 and 0,45 of ad libitum. Feeding levels were calculated from the average weekly feed intake of…
Sixty Merino lambs were randomly allotted to one of six feeding levels. The feeding levels were ad libitum (control) and 0,82; 0,72; 0,65; 0,55 and 0,45 of ad libitum. The feeding levels were calculated from the average weekly feed intake…
