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- Browsing Theses and Dissertations (Plant Production and Soil Science) by Type
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Browsing Theses and Dissertations (Plant Production and Soil Science) by Type "Dissertation"
Now showing items 1-20 of 210
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Allelopathic effect of the weed Cyperus esculentus on the growth of young Pinus patula plantations (University of Pretoria, 2001)Please read the abstract in the 00front part of this document.
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(University of Pretoria, 2007-08-27)Silverleaf nightshade (Solanum elaeagnifolium), a perennial broadleaf weed, has become a serious pest in many semi-arid areas of the world. Control of silverleaf nightshade is confounded by its ability to produce thousands ...
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(University of Pretoria, 2007-04-04)The alien invader plant Parthenium hysterophorus is a Category 1 weed in South Africa, where it poses a serious threat to indigenous vegetation in particular, and to biodiversity in general. In addition to its competitive ...
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(University of Pretoria, 2013)Conyza bonariensis, flaxleaf fleabane, is a major weed threat on cultivated and non-cultivated lands, gardens, roadsides and waste places. The weed in South Africa is believed to have originated from South America, and the ...
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(University of Pretoria, 2006-10-07)Silverleaf nightshade is a serious problem weed in many semi-arid regions of the world. Although many research efforts have been devoted to this weed’s interference with crop species, possible chemical interference ...
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(University of Pretoria, 2009-11-10)It has been suggested that the Category 1 weed, Campuloclinium macrocephalum (Less) D.C has allelopathic potential, which would, at least partially, explain its apparent success as an alien plant in South Africa. Studies ...
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(University of Pretoria, 2001)Please read the abstract in the dissertation
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(University of Pretoria, 2019)The discovery of antibiotics has been one of the major breakthroughs in the history of medicine for the treatment of microbe-related infections. Soil-borne microorganisms have been known to potentially produce clinically ...
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(University of Pretoria, 2012)Most of the fields planted with clonal tea in Malawi are deficient in micronutrients. This was evident in leaf analysis data collected in 2007 from 170 mature clonal tea fields of some of the tea estates in Malawi, which ...
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(University of Pretoria, 2013)The potato (Solanum tuberosum L.) crop serves as a staple food worldwide and is capable of reducing the world’s food shortages because unlike cereals and other agricultural crops, it is less affected by prices in the ...
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(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 ...
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(University of Pretoria, 2018)Plant growth-promoting rhizobacteria (PGPR) are bacteria that colonize the rhizosphere and/or roots in the presence of other soil microflora and have growth promotion activity and/or biocontrol activity. Plant growth-promoting ...
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(University of Pretoria, 2016)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 ...
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(University of Pretoria, 2018)The release of carbon dioxide from wetland soils is a phenomenon which involves several biochemical processes and environmental conditions. Heterotrophic respiration through the metabolisation of organic material by ...
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(University of Pretoria, 2006-05-20)Due to the fact that the mechanism of acquisition of phosphorus (P) by roots, is mainly by interception, sufficient P uptake is only ensured by maximal root development ("exploitation"). Pot and field trials were conducted ...
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(University of Pretoria, 2022)Many countries have established commercial plantations of Pinus spp. to accommodate a growing demand for wood and timber products. In the Southern Hemisphere, where Pinus spp. are non-native, establishment of these plantations ...
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(University of Pretoria, 2006-11-21)Soil erosion is a hazard that is adversely affecting agricultural production in the Eastern Cape province. The climatic conditions ad parent material (natural resources) are not conducive for the development of stable soil. ...
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(University of Pretoria, 2014-07)Sustainable forest management (SFM) principles emphasize the need for generation of socio-economic benefits for neighbouring communities, minimization of adverse effects and maintenance of good relations with the communities. ...
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(University of Pretoria, 2007-04-11)Plant nutrient management plays a vital role in the success or failure of modern Lucerne production. In South Africa, Lucerne is produced under a wide range of climatic conditions, under dryland and irrigation and in some ...
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(University of Pretoria, 2014)Rural agriculture in Mlondozi, as for South Africa, is has a low productivity, which is the result of poor knowledge, information, beliefs and land tenure which limits the acquiring of loans for inputs. A LandCare Project ...
Now showing items 1-20 of 210