• Genetic analysis of resistance to maize lethal necrosis with emphasis on strategies for improvement of host resistance 

  Kwemoi, Daniel Bomet (University of the Free State, 2021-11)

  Maize lethal necrosis (MLN) is a new disease in Sub-Saharan Africa (SSA) caused by double infection by maize chlorotic mottle virus (MCMV) with any of the many viral agents in the Potyviridae family. It has become one of ...

• Quantifying soil fertility parameters with electromagnetic induction, infrared reflectance spectroscopy and conventional chemistry procedures for wheat and maize under irrigation in arid climate 

  Gura, Isaac (University of the Free State, 2021-04)

  Current global challenges, such as food security and soil quality, cannot be solved without up-to-date, high-quality, high-resolution, spatio-temporal, and continuous soil and environmental data that characterize soil and ...

• Hydrogeology of the Table Mountain sandstone aquifer - Klein Karoo 

  Kotze, Johanita Christelle (University of the Free State, 2001)

  Abstract not available

• Die geohidrologie in die opvanggebied van die Moloporivier in die Noordelike Kalahari 

  Smit, Petrus Jurgens (University of the Free State, 1977)

  Afrikaans: Die gebied wat 58 153 km2 beslaan en waarvan ongeveer 75 persent met sand bedek is, is uitsluitlik van ondergrondse water afhankliko Die gesteentes le hoofsaklik in die westelike en suidelike dele blootgele ...

• Bio-stimulatory properties of a Lupinus albus L. seed suspension 

  Van der Watt, Elmarie (University of the Free State, 2005-05)

  English: The sustainable increase in crop yields on available land, in light of an ever growing world population, remains an issue of importance for agronomists and plant physiologists alike. With this in mind, the ...

• Fertility recovery in sandy soils under bush fallow in southern Mozambique 

  Nhantumbo, Alfredo Bernardino Julio Da Costa (University of the Free State, 2008-05)

  English: Bush fallow under shifting cultivation is the most common practised subsistence farming system in southern Mozambique. This system is likely to persist due to the existence of large areas sparsely inhabited ...

• Growth, yield and physiological response of carrot (Daucus carota L.) to different fertilizer levels and bio-stimulants 

  Sekoli, 'Mabataung Magdalena Sebina (University of the Free State, 2009-06)

  English: Concerns regarding environmental pollution, emanating from agricultural effluent due to abusive use, have led to a paradigm shift in production technology. On the other hand, subsistence farmers in developing ...

• The growth, yield and physiological response of rain fed maize to foliar applied fertilizer 

  Buitendag, Roelof Adriaan (University of the Free State, 2012-01)

  English: Regardless of past research, great uncertainty still exists amongst the research community, fertilizer agents and farmers alike with regard to the benefits of foliar inorganic fertilizer application for crop ...

• Induction of defence responses and resistance to wheat leaf rust by plant extracts 

  Cawood, Maria Elizabeth (University of the Free State, 2008-05)

  English: Information on the induced disease resistance mechanism in wheat against leaf rust (Puccinia triticina) by two natural bio-stimulants (ComCat® and the seed suspension of Lupinus albus; SS) and two extracts with ...

• Response of crops on shallow water table soils irrigated with deteriorating water qualities 

  Ehlers, Louis (University of the Free State, 2007-11)

  This study was undertaken to investigate a number of issues regarding the effect of using saline irrigation water for crop production on soils with shallow water tables. The experiments were conducted in large drainage ...

• Evaluating in-field rainwater harvesting with a sunflower - cowpea intercrop on a semi-arid ecotope in Limpopo province 

  Mzezewa, Jestinos (University of the Free State, 2012-12)

  A field study was conducted during the 2007/2008 and 2008/2009 cropping seasons in order to evaluate the in-field rainwater harvesting (IR WH) production technique with sunflower (Helianthus annuus L.) X cowpea (Vigna ...

• Evaluation of maize and sunflower production in a semi-arid area using in-field rainwater harvesting 

  Botha, John Jacobus (University of the Free State, 2006-11)

  English: Subsistence farmers occupy a large area east of Bloemfontein around Thaba Nchu in the Free State Province of South Africa. They do not enjoy food security because the area is marginal for crop production. There ...

• Changes in the phosphorus status of soils and the influence on maize yield 

  Schmidt, Christiaan Jan Jacob (University of the Free State, 2003-05)

  The principle objective of this study was to obtain P fertilizer guidelines for large maize producing areas west of the Drakensberg mountains according to a similar approach previously used in KwaZulu-Natal based on the ...

• Response of Ethiopian field pea (Pisum sativum L.) cultivars to phosophorus fertilization of Nitosols 

  Amanu, Amare Ghisaw (University of the Free State, 2003-12)

  Field pea (Pisum sativum L.) is the third most important grain legume in Ethiopia where its productivity is constrained by several biotic, abiotic and socioeconomic factors. The crop is grown mainly on a wide range of ...

• The use of operational weather and climate information in farmer decision making exemplified for the South Western Free State, South Africa 

  Zuma-Netshiukhwi, Gugulethu N. C. (University of the Free State, 2013-01)

  This study demonstrates that participating commercial and resource poor farmers used weather forecasts and climate predictions for agriculture and other science-based agrometeorological advisories during most of the study ...

• The relationship between the water regime and morphology of soils in the Weatherley catchment, northerly Eastern Cape 

  Van Huyssteen, Cornelius Wilhelm (University of the Free State, 2003-11)

  English: The Weatherley catchment is situated close to Maclear in the northern Eastern Cape Province. Soil water contents have been measured regularly, as part of a long-term project, at 28 sites in the catchment for six ...

• Estimating water retention for major soils in the Hararghe region, Eastern Ethiopia 

  Tsehai, Kibeebw Kibret (University of the Free State, 2003-02)

  English: Soil water retention IS a fundamental property controlling water storage and movement in the solurn. To determine the water retention characteristic curve is time consuming and expensive. Several attempts have ...

• Improvement of SAPWAT as an irrigation planning tool 

  Van Heerden, Pieter Schalk (University of the Free State, 2015-06)

  English: In a world with a continuous reduction in per capita availability of fresh water, the increase in the efficiency of irrigation water use becomes more important as a means to postpone the time when water shortages ...

• Leaf wetness duration measurements in a citrus canopy 

  Kudinha, Martin Tarisai (University of the Free State, 2014)

  Leaf wetness duration (LWD) is a key component of most disease-warning systems which are designed to help growers to determine when to apply control measures to suppress plant diseases. Since LWD is a complex phenomenon ...

• Agroclimatological risk assessment of rainfed maize production for the Free State Province of South Africa 

  Moeletsi, Mokhele Edmond (University of the Free State, 2010-12)

  English: The risks associated with climate and its variability over the Free State Province is the major determining factor for agricultural productivity, and has a major impact on food security across the province. To ...

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