Browsing Doctoral Degrees (Agronomy) by Title
Now showing items 1-19 of 19
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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 ... -
Biomass production, yield and quality response of spring wheat to soil tillage, crop rotation and nitrogen fertilisation in the Swartland wheat producing area of South Africa
(Stellenbosch : University of Stellenbosch, 2003-03)ENGLISH ABSTRACT: A long term experiment was conducted at the Langgewens Experimental Farm, near Malmesbury in the Western Cape province of the Republic of South Africa. The effect of soil tillage, crop rotation and ... -
Bionomics and control of the fruit flies, Ceratitis capitata (Wied.) and Pterandrus rosa (Ksh.), in the Western Cape Province
(Stellenbosch : Stellenbosch University, 1956-03)ENGLISH ABSTRACT: no abstract available -
Effect of intercropping and phosphorous application on the growth and yield of sweetpotato, groundnut and soybean.
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT: Sweetpotato (Ipomoea Batatas (L) Lam) is among the most important root crops in Mozambique. However, the yield is lower than its genetic potential due to poor soil fertility and poor agronomic practices. ... -
The effect of nitrogen and sulphur on the nutrient use efficiency, yield and quality of canola (Brassica napus L.) grown in the Western Cape
(Stellenbosch : Stellenbosch University, 2012-12)ENGLISH ABSTRACT: There is an increasing demand for canola (Brassica napus L.), an emerging oilseed crop in South Africa. Canola thrives in the Western Cape. However, yet low yields are still obtained within the production ... -
The evaluation and management of different grasses and legumes as potential cover crops in the vineyards of South Africa
(Stellenbosch : University of Stellenbosch, 2007-03)A selection of species suitable for cover crop management in the different wine grape regions is required to enable more producers to apply this environment friendly practice in a sustainable manner as part of an integrated ... -
Exploring phosphorus, mucuna (Mucuna pruriens)and nitrogen management options for sustainable maize production in a depleted kaolinitic sandy loam soil of Zimbabwe
(Stellenbosch : University of Stellenbosch, 2009-12)ENGLISH ABSTRACT: Continuous cropping without replenishing the nutrient component of soils will eventually lead to the depletion of soil nutrients. Small scale farmers in Zimbabwe often do not have the financial means to ... -
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, ... -
Influence of nutrient and light management on postharvest quality of lettuce (Lactuca sativa L.) in soilless production systems.
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT: Despite the ease in manipulating plant growth and development variables, meticulous management is required to achieve high yields and good quality crops in a soilless system. A deep understanding of the ... -
Irrigation scheduling of tomatoes (Lycopersicon esculentum Mill.) and cucumbers (Cucumis sativus L.) grown hydroponically in coir
(Stellenbosch : University of Stellenbosch, 2009-12)ENGLISH ABSTRACT: The use of capacitance water sensors for the scheduling of irrigation for hydroponic tomato and cucumber crops grown in coir was investigated in a series of laboratory and glasshouse experiments in the ... -
Morphological and physiological responses of spring wheat (Triticum aestivum L.) to spatial arrangements
(Stellenbosch : Stellenbosch University, 2008-12)The adoption of the no-till planting method brought about changes to the way the wheat crop is established in the Mediterranean climate of the Western Cape. Row widths have to increase from the normal narrow rows (170-180 ... -
Nitrogen management strategies on perennial ryegrass-white clover pastures in the Western Cape Province
(Stellenbosch : University of Stellenbosch, 2005-03)The response of perennial ryegrass and white clover, grown under controlled conditions, to fertiliser N rates applied under variable soil temperature (6, 12 and 18 °C), soil water potential (-10, -20, -25 and -35 kPa) ... -
Nutrient and water use of tomato (Solanum Lycopersicum) in soilless production systems
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Soilless production of crops relies on the addition of high concentrations of nutrients with the irrigation water. The drained nutrient solution should be re-used to reduce the risk of pollution and to ... -
Optimizing harvesting procedures of Amaranthus hybridus L. and A. tricolor L. under different watering regimes during hot and cool seasons in southern Mozambique
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT: Drought has been the major constraint for vegetable and food crop production in arid and semi-arid regions as is the case in southern Mozambique with a tropical dry savanna climate that is prone to droughts. ... -
The physiology of seed dormancy and germination in Avena fatua L.
(Stellenbosch : Stellenbosch University, 1984-08)INTRODUCTION: The study of seed dormancy and germination has for centuries occupied the minds of agronomists, physiologists, brewers, bakers and, more recently, weed scientists. The agronomist requires that the seed that ... -
Rangeland potential, quality and restoration strategies in North-Eastern Ethiopia : a case study conducted in the Southern Afar region
(Stellenbosch : University of Stellenbosch, 2006-03)Vegetation dynamics and restoration strategies of degraded rangeland were investigated near a watering point in the Allaidege communal grazing area in Administrative Zone 3 of the Afar Region in the northeastern lowlands ... -
Resistance of ryegrass (Lolium spp.) to paraquat and glyphosate in the Western Cape
(Stellenbosch : Stellenbosch University, 2007-12)ENGLISH ABSTRACT: The origin of this study dates back to 2001 when ryegrass (Lolium spp.) from a vineyard near Tulbagh was found by the author to be resistant to glyphosate. Several other populations of glyphosate resistant ... -
Witloof chicory (Cichorium intybus L. var.foliosum) - evaluation of new forcing techniques
(Stellenbosch : Stellenbosch University, 2002-03)ENGLISH ABSTRACT: South Africa is one of the worlds leading producers of chicory (Cichorium intybus L.). Most of the chicory produced is used locally for the production of instant coffee. Witloof chicory, or Belgian ... -
Yield and quality response of hydroponically grown tomatoes (Lycopersicon esculentum Mill.) to nitrogen source and growth medium
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: Pine sawdust-shavings (Pinus spp.) is at present a very popular soilless substrate in South African greenhouses. Growers use fresh pine sawdust-shavings as a substrate, which is biologically highly ...
