Department of Agronomy
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High nitrogen rates do not increase canola yield and may affect soil bacterial functioning
(American Society of Agronomy, 2019)Nitrogen fertilization has a fundamental role in agricultural productivity. However, injudicious N applications to crops are common. It is important to ensure the minimum N required for satisfactory crop growth is applied ... -
Exploring the potential of urban vertical farming : economic and technological analyses
(Stellenbosch : Stellenbosch University, 2019-03)ENGLISH ABSTRACT: Food security is defined as the situation in which all people are able to achieve access to sufficient, safe and nutritious food at all times in order to maintain a healthy and active lifestyle. Food ... -
Optimizing the use of pre-emergent herbicides in wheat production, under conservation agriculture practices in the South-Western Cape Region
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: The interception of herbicide by residue cover can result into poor weed management, leads to more weed seeds reaching the soil seed bank, which results in higher weed pressure in the following seasons ... -
Wheat and canola establishment in the Western Cape : openers, nitrogen placement and planting depth
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Wheat, the main cereal crop and canola, the main oilseed crop are the two most prominent crops established in the Western Cape under dryland conditions. Tine openers are most commonly used to establish ... -
Utilisation of cover crops : implications for conservation agriculture systems
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Cover crops have the potential to address some limitations in conservation agriculture systems with a Mediterranean climate. These limitations include, but are not limited to, a lack in crop diversity, ... -
The influence of manganese on glyphosate efficacy in ryegrass (Lolium spp.)
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: In the Western Cape of South Africa, ryegrass (Lolium spp.) developed resistance to the herbicide glyphosate within wheat fields, orchards and vineyards. The influence that plant available Mn might have ... -
Effects of light manipulation through different photo selected net colours and LEDs (Lactuca Sativa L.) and cabbage as estimated by chlorophyl fluoressence parameters, macro and micro element content and physical measurements.
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Light quantity and quality plays a fundamental role in seed germination, plant growth and development. Plants grown in high radiation regions can experience light stress, resulting in photoinhibition when ... -
Developing nitrogen fertiliser management strategies for canola (Brassica napus L.) under conservation agriculture practices in the Western Cape
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Nitrogen (N) is one of the most important nutrients in canola production systems. Improper N supply due to lack of knowledge regarding canola N management and inappropriate fertiliser guidelines, frequently ... -
Evaluation of tine and disc openers for wheat production in soils of different qualities and with various crop residue levels.
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The Swartland wheat producing area in the Western Cape is characterised by a Mediterranean-type climate and receives about 80% of the rainfall in winter season, which is particularly favourable for wheat ... -
Optimising nitrogen fertilisation of kikuyu and kikuyu-ryegrass pastures
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Dairy production in the southern Cape is mostly based on irrigated planted pastures. Pure grass pastures [kikuyu (Pennisetum clandestinum) and ryegrass (Lolium spp.)] are often established by using ... -
Glyphosate resistance in wild oat (Avena fatua L.)
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Herbicide resistance is the ability of weed species to thrive and reproduce following applied recommended dosage of the herbicide that is toxic to the wild type. There is a world-wide occurrence in ... -
The influence of granular and liquid top-dressed nitrogen on nitrogen use efficiency (NUE), grain yield and quality parameters of spring wheat (Triticum aestivum L.)
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Nitrogen use efficiency (NUE) of major cereal grains including wheat (Triticum aestivum L.) is estimated to be approximately 50% due to losses from leaching, soil denitrification, gaseous plant emissions, ... -
Identifying and using tuber characteristics to predict potato keeping quality
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Potato production in South Africa occurs in all nine provinces of South Africa and it is further divided into 16 production areas. The trial was undertaken in the Sandveld and Ceres production areas, ... -
Does zinc influence germination, vegetative growth or yield of wheat (triticum aestivum)?
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Nutrients are essential to all life on earth. Nutrients are divided into macro and micro-nutrients. Macro nutrients such as proteins and carbohydrates for example are needed by organisms in large quantities ... -
Quantifying yield gaps for rain-fed maize (Zea Mays) in South Africa: A bottom-up approach
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Maize (Zea mays) is an important crop that supports livelihoods in South Africa (RSA) and most of the Sub-Saharan Africa (SSA) region. Currently, RSA is the biggest maize producer in the region, exporting ... -
Developing nitrogen fertiliser management strategies for wheat (Triticum aestivum) under conservation agriculture practices within the Western Cape
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Nitrogen (N) is one of the most limiting plant nutrients. Supplying enough N to growing crops is one of the most critical factors influencing wheat production. There has been a strong drive towards ... -
Allelopathic effects of green manure cover crops on the germination and growth of blackjack (Bidens pilosa L.) and rapoko grass [Eleusine indica (L.) Gaertn]
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The use of green manure cover crops to improve the nitrogen levels of soils and other physical as well as biological soil properties has been extensively researched and documented in several parts of the ... -
Establishment, growth and yield of canola (Brassica napus L.) as affected by seed-drill opener, soil quality and crop residue in the Swartland
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Canola (double low varieties of Brassica napus) is an important crop for farmers implementing conservation agriculture (CA). Famers implementing CA seek to minimise soil disturbance before, during and ... -
Strategic nitrogen fertilisation of kikuyu-based pastures over-sown with legumes
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Kikuyu (Pennisetum clandestinum)-ryegrass (Lolium spp.) pastures for dairy production in the southern Cape of South Africa often receive nitrogen (N) fertilisation rates in excess of 500 kg ha-1 yr-1. ... -
Effect of seasonal distribution and rate of nitrogen fertilisation on canola production and soil bacterial communities in the Western Cape
(Stellenbosch : Stellenbosch University, 2017-12)ENGLISH ABSTRACT: Canola (Brassica napus) was introduced into crop rotation systems of South Africa in 1994. Ever since, canola production is expanding as the benefits of canola is recognised. Canola has a higher nutrient ...
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