Browsing Doctoral Degrees (Crop Science) by Title
Now showing items 1-20 of 25
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Agronomic and physiological approaches to improving productivity of selected sweet potato (Ipomoea Batatas L.) cultivars in KwaZulu-Natal : a focus on drought tolerance.
(2016-01-25)Sweet potato (Ipomoea batatas L) is a resilient food security crop with wide adaptation characteristics and hence can fit well under smallholder production. Its importance as a food security crop in relation to drought is ... -
Climate change and variability impacts on crop production in the low potential smallholder farming regions of Zimbabwe.
(2016)Climate change and variability is one of the most serious global problems affecting many sectors in the world. It is considered to be one of the most serious threats to sustainable development with adverse impact on ... -
Cowpea seed quality in response to production site and water stress.
(2007)Cowpea (Vigna unguiculata. L) is an important African crop. However, it is also an underutilized grain legume. Consequently, there is not enough research data on cowpea seed physiology. Whereas there is evidence of cowpea ... -
Drought tolerance and water-use of selected South African landraces of Taro (Colocasia esculenta L. schott) and Bambara groundnut (Vigna subterranea L. Verdc)
(2013-11-18)Issues surrounding water scarcity will become topical in future as global fresh water resources become more limited thus threaten crop production. Predicted climate change and increasing population growth will place more ... -
Drought tolerance and water-use of selected South African landraces of Taro (Colocasia esculenta L. schott) and Bambara groundnut (Vigna subterranea L. Verdc)
(2013-11-14)Issues surrounding water scarcity will become topical in future as global fresh water resources become more limited thus threaten crop production. Predicted climate change and increasing population growth will place more ... -
The effect of maize-legume cropping system and nitrogen fertilization on yield, soil organic carbon and soil moisture.
(2015-10-21)Crop rotation and intercropping are regarded as better cropping in terms of yield improvement of both cereal and legume crops as compared to monocropping. A factorial experiment was carried out at three dryland localities ... -
An evaluation of source-sink relationships in three dry bean (Phaseolus vulgaris L.) cultivars.
(2015-03-07)The effect of intensities and times of source or sink related stresses on the growth and development of a determinant (Teebus) and two indeterminant (NEP 2, Bonus) dry bean (Phaseolus vulgaris L.) cultivars was measured ... -
Fluctuation of non-structural carbohydrates in the stem and ears of maize (Zea mays (L.)) during grain fill as influenced by water stress.
(2015-03-10)Stems of maize plants may serve as reservoirs for photosynthate produced in the leaves which may then be utilized for cell growth and maintenance requirements of the plants, and in particular for grain requirements ... -
Intergration of management practices towards improving hybrid maize yield, quality and nutritional compositions under rain-fed condition.
(2017)Maize (Zea may L.) is an important staple crop grown under different ecological conditions by both large-scale commercial and smallholder farmers in Southern Africa. The current changes in climatic conditions may propel ... -
Maize crop growth and development related to solar radiation.
(2015-04-23)The interception and reflection of solar radiant energy by maize crops was measured at Cedara using tube solarimeters. From the measured data the amount of PHAR that was intercepted was related to the L value of the ... -
Modelling deficit irrigation of wheat in Zimbabwe.
(2015-03-07)Wheat is grown in Zimbabwe during the relatively dry, cool winter with irrigation. On most large-scale farms, land resources exceed irrigation water resources. Consequently, the efficient use of water is of prime concern. ... -
Nutritional studies with a Spanish-type groundnut on an Avalon medium sandy loam soil.
(2015-04-23)Calcium requirements of a Spanish-type groundnut cultivar on an Avalon medium sandy loam soil. The effect of different levels of application of agricultural lime, dolomitic lime and gypsum on yield and quality of the ... -
Physiological basis of seed germination in Cleome gynandra (L.)
(2005)Dormancy characteristics and optimum conditions for germination of Cleome gynandra seeds have not been explained. Seed storage proteins were extracted, analysed with SDS-PAGE and sequenced. Seed proteins of Cleome were ... -
Pre-breeding of bottle gourd [Lagenaria siceraria (molina) standl.].
(2016)Abstract available in PDF file. -
Quantifying productivity and water use of sorghum intercrop systems.
(2016-03-10)Rural sub-Saharan Africa (SSA) faces the challenge of achieving food security under water scarcity amplified by climate change and variability. Under these conditions, it is necessary to adopt cropping systems that have a ... -
Quantitative and qualitative studies on grain sorghum for traditional beer (dolo) production in Burkina Faso.
(2014-10-08)In the Central Plateau of Burkina Faso, grain sorghum [Sorghum bicolor (L.) Moench] is the major cereal crop used to produce the traditional beer commonly called dolo. Improvement of the dolo chain supply that requires ... -
Relationships between climatic indices and soil properties that reflect leaching and weathering in the Natal Midlands, and their use in the assessment of afforestation potential.
(2015-04-23)In the summer rainfall regions of Southern Africa, knowledge of the mean annual effective rainfall (MAER) pertaining to a site is critical for the assessment of that site's afforestation potential. The ability to estimate ... -
The responses of insect pests to a changing and variable climate in Zimbabwe.
(2017)Abstract available in PDF file. -
Season effects on the potential biomass and sucrose accumulation of some commercial cultivars of sugarcane.
(2009)An experiment was conducted at Pongola (27°24´S, 31°25´E; 308m altitude) in South Africa to study the effects of season on growth and potential biomass and sucrose yields on nine commercial sugarcane cultivars. The treatments ...