Faculty of Science e-Theses Collection: Recent submissions
Now showing items 161-180 of 257
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A flexible plant based irrigation control for greenhouse crops
(2012-09-13)The project sought to minimize water use, improve water use efficiency and improve crop productivity for greenhouse crops. A flexible plant based automated irrigation system was designed and implemented for a tomato crop ... -
A flexible computer based irrigation control system
(2012-09-13)The project seeks to investigate the possibility of efficient water use in irrigation scheduling systems through the use of a designed flexible computer based irrigation control system. One of the specific objectives of ... -
Modelling of Greenhouse Microclimate for Rose Production in Zimbabwe.
(2012-09-13)The main objective of the project was to adapt and validate the Gembloux Dynamic Greenhouse Climate Model for the prediction and control of the microclimate of an operational greenhouse in Zimbabwe. The use of modelling ... -
Atmospheric aerosol particles and transport: a climatological perspective for Zimbabwe
(2012-09-12)Atmospheric aerosol particles were collected in the coarse (2-10 µm diameter) and fine (< 2 µm diameter) size fractions at Rukomechi research station, (16.1 °S, 29.4 °E, 500 m a.s.l.), northern Zimbabwe from September 1994 ... -
Validation of Satellite-based Rainfall Estimation over the Limpopo Basin
(2012-09-12)The main objective of this study was to validate satellite-based rainfall estimation algorithms over the Limpopo Basin. The satellite rainfall estimation was done using four algorithms which combine infrared and passive ... -
GROUND MAGNETICS AND INDUCED POLARISATION METHODS AT LORNA DOONE FARM, GLEN FOREST AREA, HARARE
(2012-09-12)A geophysical survey was carried out at Lorna Doone farm, a dairy farm located 40 km from the Harare city centre. The study area lies within the Harare – Bindura – Shamva greenstone belt. Rocks in the area include ... -
Experimental investigation and modelling of condensation of a rose crop in a greenhouse in Zimbabwe
(2012-09-12)The main aim of this study was to experimentally determine the conditions when dew forms on leaf surfaces from measured ambient conditions, and to adapt an appropriate vegetative condensation model to describe and predict ... -
The Behaviour of Particulate Matter and Carbon Dioxide Concentrations in Harare
(2012-09-12)As African countries industrialize, the emission of various pollutants is likely to increase. Air pollution can have adverse impacts on human and animal health and ecosystems. There has been very limited air pollution ... -
Climate variability and change and its potential impact on maize yield in Northeastern Zimbabwe
(2012-09-12)The main aim of this study was to investigate climate variability and change and its potential impact on maize yield in Northeastern Zimbabwe. Understanding the impact of climate change on crop production may help optimize ... -
Effect of duration of early-age thermal conditioning of broiler chickens on production and heat tolerance
(2012-09-12)The main objective of the study was to investigate the appropriate duration of early age thermal conditioning that would improve heat tolerance in broiler chickens with a minimum reduction in production performance. 200 ... -
Synthesis and Optical Characterisation of C-sio2 and C-nio Sol-gel Composite Films For Use as Selective Solar Absorbers.
(2012-09-12)Carbon-silica (C-SiO2) and carbon-nickel oxide (C-NiO) composite films were fabricated on aluminium and steel substrates by the sol-gel technique. The substrates were cleaned before spin coating took place. The precursor ... -
Determination of water productivity of maize varieties grown in Zimbabwe
(2012-09-12)The quantification of water use in plants is necessary to maximize water use efficiency in semi -arid areas where water is often limiting. The main objective of the study was to quantify maize water productivity and apply ... -
A Mathematical Model Of Combined Pre-Exposure, Post-Exposure Vaccines And Treatment Of Tuberculosis
(2012-09-12)Due to high prevalence of tuberculosis (TB) in developing countries where HIV prevalence is also high, developing effective TB vaccines that will prevent infection and reactivation of latent infection is a high priority. ... -
Gas lensing in a heated rotating pipe
(2012-09-07)When a heated pipe is axially rotated, the dynamics of the gas inside exhibit properties reminiscent of a positive lens. These are the result of a parabolic distribution of refractive index in the pipe, which is caused by ... -
Design and consruction of microcontroller-based multi-parameter monitoring system.
(2012-09-07)Many farmers and agricultural research groups need environmental data to augment their agricultural measurements. Such data is needed to understand the physical environment that includes the climate in general, and the ... -
Production and Physiological Responses of Lactating Holstein Dairy Cows to the Provision of Shade in Sub-Tropical Zimbabwe.
(2012-09-07)The objective of this study was to establish production and physiological benefits of shade provision to lactating Holstein cows under hot summer conditions in Zimbabwe. Different shading materials providing shade at ... -
INDUCED POLARISATION TECHNIQUES FOR MINERAL EXPLORATION IN THE KUPA GRID, MADHLAMBUDZI, SOUTH WESTERN ZIMBABWE
(2012-09-07)The geophysical techniques of gravity, magnetics, induced polarisation (IP) and radiometrics were carried out in Madhlambudzi about 120 km west of Bulawayo from May to June, 2006. The area is overlaid by Kalahari sand and ... -
Monitoring the simultaneous response of various water status indicators for use in the irrigation scheduling and drought stress detection of a greenhouse tomato crop.
(2012-09-07)An experiment was conducted in a greenhouse at the Department of Biological Sciences, University of Zimbabwe to test the use of various plant water status indicators for use in the irrigation scheduling and water stress ... -
Response of Navel orange trees to timed partial root zone drying in northern Zimbabwe
(2012-09-07)Navel orange trees (Citrus sinensis (L.)Osbeck) were drip irrigated in an 8 hectare commercial orchard at Mazowe Citrus Estate (Mazowe Citrus Estate: block U5A) in the 2009/2010 season. We investigated the effects of partial ... -
Application of optical methods to determine the concentration of sugar solutions
(2012-09-07)Two optical methods were used to determine the concentration of sugar (sucrose) solution. The first employed a hollow perspex prism, a prism spectrometer and a monochromatic light source. The angles of minimum deviation ...
