• Calibration of sap flow techniques in citrus using the stem perfusion method 

  Sam, Mpaballeng Catherine (University of Pretoria, 2017)

  The aim of this study was to calibrate and decide on the most appropriate sap flow technique for citrus species in the laboratory by pushing water through cut branches. Various sap flux density techniques, including heat ...
• Measurement and modelling of water use of citrus orchards 

  Mahohoma, Walter (University of Pretoria, 2017)

  Water requirements of evergreen citrus orchards in semi-arid regions of the world are mostly met through irrigation. Definitive knowledge of crop water use is the fundamental basis for sound water management under these ...
• Yield and quality decline in vegetatively propagated cultivar tea (Camellia sinensis (l) O. Kuntze) under continuous mechanical harvesting 

  Madamombe, Godwil Mirirai (University of Pretoria, 2017)

  Manual plucking is highly labour intensive, occupying almost 70% of the total labour force on tea estates and accounting for approximately 40 - 45% of cost of production. The high labour costs and shortages and the cost ...
• An assessment of the local sociocultural concept of climate change and its perceived effect on forestbased livelihoods : case study of rural communities of Vhembe District South Africa 

  Ofoegbu, Chidiebere (University of Pretoria, 2017)

  Forests play an important role in climate-change management, particularly at rural community level. At the same time, forests are essential resources for human welfare and an important part of the landscape. In addition ...
• HPLC and colourimetric quantification of shikimic acid levels in crops after glyphosate treatment 

  Bestbier, Johannes Botha (University of Pretoria, 2016)

  The shikimic acid pathway is one of the major biosynthetic pathways in higher plants responsible for the biosynthesis of aromatic amino acids (tryptophan, tyrosine and phenylalanine) and multiple secondary metabolites, ...
• The contribution of manganese oxides to redox buffering in selected soils of the South African Highveld 

  Mudaly, Leushantha (University of Pretoria, 2016)

  The definition of a wetland places great importance on inundation and saturated soil conditions. The use of redoximorphic features as a soil wetness indicator is widely practiced. The reduction of Fe3+ to Fe2+, resulting ...
• Nitrophosphate as an alternative phosphate fertiliser for acidic sandy soils 

  Mlalazi, Mthandazo (University of Pretoria, 2016)

  It is a common practice to use large quantities of reduced nitrogen (N) such as urea, ammonia (NH3) and ammonium (NH4+) as pre-plant (before planting) fertilisers in the Free State, Mpumalanga and North West where farmers ...
• Assessment of weed control methods for maize production by emerging farmers on commercial farms 

  Marava, Garikai (University of Pretoria, 2016)

  Maize (Zea mays L) is a staple food crop grown in South Africa by both large scale commercial and smallholder farmers. During the 2013/14 cropping season maize occupied about 2.6 million hectares of the total 3.9 million ...
• The interactions between biotic and abiotic factors influence the sustainability of tomato production in South Africa 

  Malherbe, Stephanus (University of Pretoria, 2016)

  Tomato production was an important economic activity in the Limpopo Province of South Africa. A clear tomato yield gap existed between South Africa and the other countries in Southern Africa. Understanding the reasons ...
• The effect low temperature on growth and bolting of cabbage (Brassica oleracia var. capitata L.) 

  Ngwenya, Manzi (University of Pretoria, 2016)

  Cabbage is one of the most important cash crops which can contribute to food security. It is a cool season crop and its production maybe seriously impaired by bolting. Therefore, understanding cabbage bolting as affected ...
• Simulating nitrogen dynamics in sugarcane cropping systems using DSSAT-Canegro 

  Matlaletsa, Samuel (University of Pretoria, 2016)

  Sugarcane is a high-biomass producing crop and often requires substantial amounts of nitrogen (N) fertiliser to achieve optimal yields. Nitrogen fertiliser represents a significant input cost for the sugar industry. This ...
• The effects of fire and grazing management on unpalatable climax grasslands dominated by Cymbopogon validus and Hyparrhenia hirta 

  Ford, Maurice (University of Pretoria, 2016)

  Fire alone, and in combination with grazing, influence established individual plants, and their respective regeneration potential variously with consequences on species dynamics. This study gives attention to the effects ...
• The uptake of different formulations of foliar applied micronutrients by Citrus sinensis (L.) Osbeck cv. Valencia 

  Van der Merwe, Surita Marizaan (University of Pretoria, 2016)

  Perennial fruit crops like citrus can benefit from foliar nutrition since deep roots can deplete the soil and soil amendments other than fertigation are not easily applied without damaging roots. Increases in production ...
• Maize growth and yield as affected by different soil fertility regimes in a long term trial 

  Dlamini, Jerry Celumusa (University of Pretoria, 2015)

  Maize is the world’s third most important cereal after wheat and rice. It serves as a staple food to more than 1.2 billion of the world population. However, its production is threatened by declining soil fertility; mainly ...
• Soybean ( Glycine max L. Merr) productivity in varying agro-ecological zones 

  Dlamini, Abraham P. (University of Pretoria, 2015)

  Soybean (Glycine Max L. Merr) is one of the most important food crops in the daily diets of humans and animals, as it provides essential proteins and other nutrients. The crop is not only a source of food, but is also ...
• Seed and soil preparation techniques influence on the establishment and growth of three common subtropical pasture species 

  Coetzee, Dirk Jacobus (University of Pretoria, 2015)

  It is often a challenge to successfully establish perennial pastures which in turn determines the production potential and persistence thereof. Three perennial subtropical grass species commonly cultivated in South Africa ...
• Growth and yield responses of commercial sugarcane cultivars to residue mulching in different environments 

  Nxumalo, B.N.G. (Braveman Nkosinathi Gcugcwa) (University of Pretoria, 2015)

  Mulching in sugarcane agriculture involves retaining leaf residue on the ground after harvesting. Many sugarcane industries across the world support this agronomic practice because of its benefits as opposed to burning ...
• Growth yield and chemical composition of Pelargonium sidoides DC. in response to nitrogen and soil water management 

  Mofokeng, Motiki Meshack (University of Pretoria, 2015)

  Pelargonium sidoides DC. is one of many medicinal plant species that are harvested in the wild. The current trade in these medicinal plants has negatively affected their distribution in the wild due to unsustainable ...
• Water use efficiency of orange-fleshed sweetpotato ( Ipomoea batatas L. Lam.) 

  Masango, Steve (University of Pretoria, 2015)

  The objectives of this research were to assess the yield response of orange fleshed sweet potato to water supply at different frequencies; to evaluate how beta carotene content and nutritional water productivity of orange ...
• Forecasting yields of processing potatoes in different South African environments using the LINTUL model 

  Machakaire, Allan Tatenda Batsirai (University of Pretoria, 2015)

  The potato processing industry relies on yield forecasts for production planning and accurate yield forecasting is a challenge. Expected yield forecasts need to be produced as early as eight weeks before harvest and delivery ...

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