Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"rain-fed"”.
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An analysis of rainy season characteristics over the Limpopo region
… investigates characteristics of the summer rainy season over the Limpopo region that are important to the agricultural sector and other user groups. The Limpopo region supports a large rural population dependent on rain-fed agriculture as well as significant biodiversity, particularly in the …
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Impacts of Crop Diversification and Household Resilience on Welfare and Child Nutrition in Senegal
… increases production and income instability in rain-fed rural economies, with consequences for food security and child nutrition. In Senegal’s Groundnut Basin, where households rely on rain-fed farming and have limited formal risk-management options, crop diversification and household resilience …
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Optimal land and water allocation to agriculture and hydropower in the Upper Blue Nile basin
… allocate land and water resources optimally to rain-fed, and irrigated agriculture, and (c) allocate water to agriculture and hydropower production, and investigate trade-offs between them. This thesis makes two methodological contributions.
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Una medición de productividad y cambio tecnológico en agroquímicos: el caso del arroz Colombiano después de la revolución verde
… for long run series. Private entities such as Fedearroz have compiled entire data sets relating national cost matrices, product prices, yields, cultivated areas, and other useful data to develop sector studies. For this case, rice sector productivity and technical changes are to be analyzed to …
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Genotypic variation in water use efficiency, gaseous exchange and yield of four cassava landraces grown under rainfed conditions in South Africa
Agricultural production under rain-fed conditions is largely dependent on the availability of water stored in the soil during rainfall events. The production of cassava (Manihot esculenta Crantz) under rain-fed conditions in the north-eastern part of South Africa is constrained by low and erratic …
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Assessment of irrigation use on crop yield and water supplies in the Midwestern U.S.
… the increased use of irrigation on historically rain-fed crops will affect regional water use significantly, increasing the risk of water supply deficits in the crop growing season. The assessment of water footprint in addition to the previous analysis of irrigation impact on crop yield, found …
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Three essays on irrigated agriculture in Brazil
… the technical efficiency between irrigators and rain-fed producers; the effect of irrigation on grain supply and demand for productive factors; and added gross revenue from the adoption of irrigation technology. To achieve those goals, three chapters are developed: Irrigation, technical …
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Simulating the characteristics of droughts in Southern Africa
… most of the population in the region is based on rain-fed agriculture. Previous studies have projected that global warming may enhance the frequency and intensity of droughts over Southern Africa in the future. However, the credibility of this projection depends on the ability of the global and …
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Synthesis of climate-water-food nexus in Illinois – data analysis and modeling
… nexus in the US Midwest dominated by rain-fed agricultural systems by leveraging data analysis and simulation modeling approaches. In accordance with the first step of the nexus, the historical temperature and precipitation time-series data were analyzed. The main objective of this …
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Evaluating the climate-related capacities and vulnerabilities of the Matsaudi Community in Botswana
… of Botswana is heavily reliant on tourism and rain fed agriculture. The community faces social and health related risks from climate hazards. Solutions are needed. Unfortunately, a paucity of studies exists in these marginalized communities. Aim: To explore the health and social effects of …
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Mechanisms for the wet and dry years over Eritrea during the summer rainfall season
The economy of Eritrea depends on rain-fed agriculture, which is highly sensitive to seasonal and inter-annual variations of rainfall. Adequate amount of rainfall is required every year for adequate agricultural production and drinking water. Therefore, the distribution of seasonal rainfall in …
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Murky waters: discerning among sources of natural variation under high uncertainty and at multiple scales
… or above tree line. I also found that primarily rain-fed rivers undergo large seasonal temperature fluctuations that closely track air temperature – high coupling – while snow-fed rivers tend to be more weakly, and in some cases inversely, coupled with air temperature fluctuation due to influx of …
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Climate change adaptation measures in agriculture : a case of conservation agriculture for small-scale farmers in Kalomo District of Zambia
… staple crop. Furthermore, they highly depend on rainfall for their rain-fed agricultural production. SSFs have limited capacity to adapt to extreme climate variability, thus rendering them to be among the most vulnerable to climate change. Some recent studies show that agricultural production and …
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Religion and ecology : climate change between Christian and Shona religious beliefs and practices
… Much of Zimbabwe’s agricultural production is rain fed and the erratic manner in which rain has been falling is cause for concern among many people. Disease outbreaks are on the rise since the world is experiencing severe temperature rises. Droughts and floods are also on the rise. If the world …
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Extreme rainfall events over the Pongola-Mtamvuna Water Management Area of South Africa
… southern Africa experiences substantial rainfall variability both spatially and temporally, due to regional orography, geographic position, and local sea-surface temperatures. Extreme weather conditions such as droughts and floods are not uncommon and can result in both positive and …
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Modeling and designing the future of drip irrigation : a validated parametric analysis used to design low power, pressure compensating drip emitters
… zone. It can produce up to 90% more crops than rain-fed irrigation, and reduce water consumption by 70% compared to conventional flood irrigation. In the coming years, the demand for new, low-cost, low-power drip irrigation technology will continue to grow, particularly in developing countries. …
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Ensemble-characterisation of satellite rainfall uncertainty and its impacts on the hydrological modelling of a sparsely gauged basin in Western Africa
… to make accurate and timely estimations of rainfall. This problem is especially acute in sub-Saharan Africa, where a paucity of rain recording radar and sufficiently dense raingauge networks combine with highly variable rainfall, a reliance on agriculture that is predominantly rain fed and …
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An investigation into using stable water isotopes to determine the dependency of vegetation on groundwater at Cape Point Nature Reserve
We hypothesized that rainwater had a different and distinct isotopic signal to groundwater, and thus plants growing on groundwater-fed areas would have a unique and distinct isotopic composition compared to plants growing on freely-drained soils. We studied two groundwater-fed areas and adjacent …
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An investigation of the impacts of intra-seasonal rainfall variability on the maize growing season in Limpopo Province, South Africa from 1990-2014
Rain fed maize is an important staple food crop for rural communities in Southern Africa as it plays a major role in ensuring food security and improving livelihoods. Rainfall consistency and intensity is an essential requirement for successful maize growing seasons. The variability of …
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Barriers to selling livestock in the face of drought in the Omusati Region of North Central Namibia
… has shown that livestock farming depends on rain-fed agriculture among other things, thus making communal farmers vulnerable to climate change in the future. Given this, it often makes sense for farmers to sell their livestock and explore alternative livelihood options. However, farmers in …
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