• Short-term effects of tillage systems, fertilisation, and cropping patterns on soil chemical properties and maize yields in a loamy sand soil in Southern Mozambique 

  Chichongue, Oscar; Van Tol, Johan J.; Ceronio, Gert M.; Du Preez, Chris C.; Kotze, Elmarie (MDPI, 2022)

  Sub-Saharan Africa (SSA) agriculture is characterized by dependence on erratic rainfall, inadequate conservation practices, and a decline in soil fertility resulting in low crop productivity. Therefore, conservation ...

• Fire, herbivores, and vegetation type shape soil biochemistry in sodic patches of a semi-arid Savanna ecosystem 

  Malongweni, Siviwe Odwa; Van Tol, Johan (MDPI, 2022)

  In the Kruger National Park (KNP), the lower slopes of catenas have open patches referred to as sodic patches. Fire and herbivores are dominant mediators of vegetation in sodic patches. The effect of fire and herbivores ...

• Soil organic matter storage in irrigated Tsitsikamma dairy farms with minimum tilled pasture mixtures: case studies 

  Loke, Palo Francis; Kotze, Elmarie; Du Preez, Christiaan Cornelius (MDPI, 2022)

  In recent years, pasture production changed from conventional tilled single pastures to minimum tilled mixed pastures in the Tsitsikamma region, South Africa. However, storage of soil organic matter (SOM) under minimum ...

• 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 ...

• Characterisation and effects of different levels of water stress at different growth stages in malt barley under water-limited conditions 

  Bello, Zaid Adekunle; Van Rensburg, Leon D.; Dlamini, Phesheya; Tfwala, Cinisani M.; Tesfuhuney, Weldemichael (MDPI, 2022)

  Malt barley is typically grown in dryland conditions in South Africa. It is an important grain after wheat, but little is known about its water requirements and, most importantly, how it responds to water stress. Determining ...

• Climate change impacts on temperature and chill unit trends for apple (malus domestic) production in Ceres, South Africa 

  Tharaga, Phumudzo; Steyn, Abraham Stephanus; Coetzer, Gesine Maria (MDPI, 2021)

  Climate is an essential part of crop production, determining the suitability of a given region for deciduous fruit products such as apples (Malus domestica). It influences the yield and quality of fruits. There is strong ...

• Impacts of soil information on process-based hydrological modelling in the Upper Goukou Catchment, South Africa 

  Smit, Edward; Van Tol, Johan (MDPI, 2022)

  Although soils form an integral part of landscape hydrological processes, the importance of soil information in hydrological modelling is often neglected. This study investigated the impact of soil information on streamflow ...

• Soil fertilization synergistically enhances the impact of pollination services in increasing seed yield of sunflower under dryland conditions 

  Adelabu, Dollop Bola; Bredenhand, Emile; Van der Merwe, Sean; Franke, Angelinus Cornelius (Cambridge University Press, 2021)

  To exploit the potential of ecological intensification during sunflower cropping, it is crucial to understand the potential synergies between crop management and ecosystem services. We therefore examined the effect of ...

• Influence of clay mineral amendments characteristics on heavy metals uptake in vetiver grass (Chrysopogon zizanioides L. Roberty) and Indian mustard (Brassica juncea L. Czern) 

  Otunola, Beatrice Omonike; Aghoghovwia, Makhosazana P.; Thwala, Melusi; Gomez-Arias, Alba; Jordaan, Rian; Hernandez, Julio Castillo; Ololade, Olusola Oluwayemisi (MDPI, 2022)

  Phytoremediation is limited when heavy metals reduce soil quality and, subsequently, inhibit plant growth. In this study, we evaluated the use of attapulgite and bentonite as amendments in soil contaminated with multiple ...

• High-density grazing in southern Africa: inspiration by nature leads to conservation? 

  Franke, A. C.; Kotze, E. (Sage, 2022)

  High-density grazing is a form of rangeland management aiming to strategically mimic the ways grasslands are utilized by grazers in natural situations. It aims to regenerate grasslands by improving soil and vegetation ...

• Using hydropedological characteristics to improve modelling accuracy in Afromontane catchments 

  Harrison, Rowena Louise; Van Tol, Johan; Toucher, Michele L. (Elsevier, 2022)

  Study region: Three Afromontane catchments in the Cathedral Peak experimental research site, within the uKhahlamba-Drakensberg escarpment, KwaZulu-Natal, South Africa. Study focus: Gaining insight into the hydropedological ...

• Sampling and extraction methods for soil inorganic N determination to calibrate the EM38 in irrigated fields 

  Steenekamp, Diandra (University of the Free State, 2019-06)

  Precise management of N variability in crop fields are required to increase yields and ensure sustainable and economic crop production, whilst not having a negative impact on the environment. A popular type of sensor for ...

• Besproeibaarheid van gestruktureerde gronde 

  Nell, Johannes Petrus (University of the Free State, 1991-11)

  Afrikaans: Data van 333 profiele se fisiese (breukmodulus, infiltrasie, hidrouliese geleivermoë, lugwaterdeurlatendheidverhouding, waterretensie en Atterberggrense), chemiese (KUK, UNP, NAV, pH, elektriese weerstand, ...

• Biokatalitiese komponente in sade van enkele spesies uit die families Fabaceae en Caryophyllaceae 

  Du Plessis, Helena Aletta (University of the Free State, 2002-11)

  English: In the south of Germany it was observed that species of the families Fabaceae and Caryophyllaceae survived an unknown environmental catastrophy while this was not the case with plant species from other families ...

• The effect of nitrogen fertilisation on the growth, yield and quality of swiss chard (Beta vulgaris var. cicla) 

  Motseki, Pontso Christina (University of the Free State, 2008-05)

  English: The sustainability of subsistence farming associated with the health of rural communities’ necessitated research on Swiss chard as it forms an integral part of food consumed by the poor in developing countries. ...

• Organic matter restoration by conversion of cultivated land to perennial pasture on three agro-ecosystems in the Free State 

  Birru, Tilahun Chibsa (University of the Free State, 2002-01)

  English: Understanding the process of organic matter degradation and restoration is important with regard to sustainable agricultural production on any agro-ecosystem, and of particular importance where degradation is ...

• The effect of crop residue cover and soil texture on crusting 

  Massingue, Felicidade Isabel (University of the Free State, 2002-10)

  Large areas of cultivated soils throughout the world develop rainfall-induced soil crusts. The soil crusts are usually the cause of reduced seedling emergence. To have quantitative information on the factors influencing ...

• Studies oor die toeganklike fosforstatus van sekere Vaalhartsgronde 

  Eloff, Jacobus Frederick (University of the Free State, 1971-12)

  Afrikaans: Op die Vaalhartsbesproeiingskema is 30 veldproewe uit gelê om die toeganklike fosforstatus van die verteenwoordigende gronde te bepaal. Sitroensuur-P, Bray-P, Olsen-P, CAL-P en hars-P uit die grond geëkstraheer, ...

• Hydrogeology of the Table Mountain sandstone aquifer - Klein Karoo 

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

  Abstract not available

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