Browsing Theses and Dissertations by Issue Date
Now showing items 61-80 of 127
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Performance of dairy goats in selected regions of Botswana and the effect of improved management practices on milk yield and composition
(Botswana University of Agriculture & Natural Resources, 2015-11)In Botswana milk production generally come from dairy cattle breeds, but there are some goat breeds that have the genetic potential for producing large quantities of milk. This dissertation was a record of two studies on ... -
Pearl millet : influence of mineral biofortification and simple processing technologies on minerals and antinutrients
(University of Pretoria, 2016)Pearl millet is an important staple food in rural Africa. However, the mineral bioavailability of pearl millet is low due to its high content of antinutrients, particularly phytate. This research investigated the effects ... -
Comparison of genetic and immunological responses to tick infestation between three breeds of sheep in South Africa
(University of the Free State, 2016-01)The study investigated genetic parameters and immunological responses to tick infestation in three South African sheep breeds (Namaqua Afrikaner [NA], Dorper and SA Mutton Merino [SAMM]). The study aimed to estimate genetic ... -
Effect of phosphorus on the growth yield and nutrient uptake of intercropped maize( Zea mays (L.) and cowpea (Vigna unguiculata (L.) walp)
(Botswana University of Agriculture & Natural Resources, 2016-06)In addition to low soil moisture and its holding capacity, constraints to arable agricultural production in Botswana include low levels of nutrients, especially phosphorus. The objectives of the study were to determine ... -
Effects of storage temperature and hot water treatment duration on chilling injury and quality of mango (Mangifera indica L.)
(Botswana University of Agriculture & Natural Resources, 2016-08)Low temperature storage is the most effective method of extending postharvest life and marketing period, and maintain fruit quality because it retards physiological processes such as respiration, ethylene production, ... -
Effect of soil water deficit on water use efficiency of cowpea (Vigna unguiculata L. Walp)
(Botswana University of Agriculture & Natural Resources, 2016-09)There is a global concern over the capacity to feed a rapidly growing world population against a background of climate change which challenges productivity of major crops such as cowpea and their ability to ensure food ... -
Vegetation and soil conditions around water points in ranching and communal grazing systems in the hard veld and sandveld of Botswana
(Botswana University of Agriculture & Natural Resources, 2017-05)Artificial water sources or boreholes were introduced in Botswana to mitigate surface water scarcity in rangelands and aid livestock production. Gradually piospheres were observed, areas close to water points experienced ... -
An assessment of biological nitrogen fixation on legumes growing on farmers’ fields and in natural systems and authentication of associated root nodule bacteria
(Botswana University of Agriculture & Natural Resources, 2017-05)The low inherent soil fertility, especially nitrogen (N) constrains arable agriculture in Botswana. Nitrogen is usually added to soil through inorganic fertilizer application. In this dissertation, biological N? fixation ... -
Effect of leaf bud removal and partial leaf harvesting on growth, development and yield of cowpeas (Vigna unguiculata [L.] Walp.)
(Botswana University of Agriculture & Natural Resources, 2017-05)Cowpea (Vigna unguiculta [L.] Walp.) originates in tropical Africa. Most producers engage in “dual purpose” cowpea production, where sequential harvests of leaves arc made, followed by seed harvest at the end of the ... -
A comparative study of growth performance and sensory evaluation of Tswana and Orpington chickens reared up to 18 weeks of age under intensive system
(Botswana University of Agriculture & Natural Resources, 2017-06)Two studies were carried out to compare growth performance, carcass characteristics and sensory evaluation of local Tswana chickens and Orpingtons. In the first study, a total of 120 day-old chicks (60 Tswana and 60 ... -
Characterisation of Jatropha curcas L. germplasm within Botswana using morphological and molecular markers (SSR)
(Botswana University of Agriculture & Natural Resources, 2017-06)Jatropha curcas L. is an undomesticated plant species that has recently received great attention for its utilization in biofuel production in many countries including Botswana. The main goal of this study was to identify ... -
Influence of sorghum-legume intercrop on insect diversity, natural enemies and damage on sorghum by spotted stemborer (chilo partellus swinhoe) (lepidoptera:crambidae)
(Botswana University of Agriculture & Natural Resources, 2017-06)Stemborers are considered major pests of sorghum (Sorghum bicolor (L) Moench) in Botswana. An evaluation of the effect of intercropping sorghum with legumes on insect diversity, natural enemies and damage on sorghum by ... -
Effects of nitrogen and phosphorus on growth, development, yield, and oil content of safflower (Carthamus tinctorius L.)
(Botswana University of Agriculture & Natural Resources, 2017-07)Safflower is a multipurpose crop grown for the orange-red dye that is obtained from its petals, medicinal properties, feed value and especially for its high quality oil (Dajue and Mondel. 1996; Dwivedi, 2005; Sirel and ... -
Evaluation of the nutritional potential of safflower (Carthamus tinctoriiis L.) leaves, seed and cake after oil extraction to be used as animal feed
(Botswana University of Agriculture & Natural Resources, 2017-09)Safflower is an annual oil seed crop adapted to arid and saline regions of the world, is a potentially novel food and medicine source, which has not been fully explored in the last century. Safflower’s ability to forage ... -
Effect of nitrogen fertilizer and planting density on the growth and yield of intercropped sorghum and cowpea under rainfed conditions
(Botswana University of Agriculture & Natural Resources, 2017-11)Cereal-legume intercropping can be an alternative for smallholder farmers to mitigate the effects of climate change and to promote sustainable agricultural production. A field experiment was conducted at BUAN gardens during ... -
Design and development of a borehole pumping and water level monitoring control system in Botswana
(Botswana University of Agriculture & Natural Resources, 2017-11-07)Botswana experiences recurrent droughts and has limited surface water resources with the average annual rainfall varying from a minimum of less than 250 mm in the Southwest region and a maximum of about 650 mm in the ... -
Phenotypic and genetic characterization of indigenous Tswana pigs and their reproductive performance under an intensive management system
(Botswana University of Agriculture & Natural Resources, 2018-03)The study was carried out to phenotypically characterize indigenous Tswana pigs under intensive management system and to genetically characterize Indigenous Tswana pig Population using a panel of 12 microsatellite markers. ... -
Effect of planting date, plant population and varieties on key resource use efficiency of sorghum (Sorghum bicolor L. Moench)
(Botswana University of Agriculture & Natural Resources, 2018-05)Inappropriate selection of planting date, plant population and varieties choice have a negative impact on the efficient use of resources and yield returns resulting in some challenges that affect crop production. The ... -
Physiological responses and meat quality of Potchefstroom koekoek cockerels offered canola meal as an alternative to soybean meal
(North-West University, 2018-05)The current study was conducted to assess growth performance, protein utilisation efficiency, blood parameters, meat quality, bone breaking strength, density and mineral composition of Potchefstroom Koekoek (PK) cockerels ... -
Effects of storage temperature on postharvest quality of wild plum (Ximenia americana L.)
(Botswana University of Agriculture & Natural Resources, 2018-06)Wild plum (Ximenia americana L.) is a tropical crop widespread throughout the tropics of Africa, India and South East Asia to Australia, New Zealand, Pacific Islands, West Indies, Central and South America. Despite the ...