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 102 for “"dryland"”.
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Reservoir sedimentation in dryland catchments : modelling and management
Semi-arid environments are mainly characterized by scarce water resources and are usually subject to risks of water stress. In these regions, water supply for drinking and irrigation purposes depends strongly on storage in surface reservoirs and sediment deposition in these reservoirs affects …
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Dryland vulnerability : typical patterns and dynamics in support of vulnerability reduction efforts
… ecosystem functioning and human livelihoods in drylands are frequently exacerbated by natural and socio-economic stresses, including weather extremes and inequitable trade conditions. Therefore, a better understanding of the relation between these stresses and the socio-ecological systems is …
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Dryland state transitions, trophic interactions, and the restoration of a keystone species
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Analysis of Dryland Forest Phenology using Fused Landsat and MODIS Satellite Imagery
… sensing data fusion products to the analysis of dryland vegetation phenology. The objective of the first study was to verify the quality of the output products of the spatial and temporal adaptive reflectance fusion method (STARFM) over the dryland Arizona study site. Synthetic 30 m resolution …
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Measurement and modelling of water and sediment fluxes in meso-scale dryland catchments
… serious threat for many societies worldwide. In drylands, water management measures like the construction of reservoirs are affected by eroded sediments transported in the rivers. Thus, the capability of assessing water and sediment fluxes at the river basin scale is of vital importance to …
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Terrestrial Water Storage Change Over Dryland Regions Using Observational Data and Model Simulations
Drylands occupy a large fraction of global terrestrial areas and are home to around 2.5 billion people. Dryland ecosystems are important constituents of global biodiversity and impact the global carbon cycle. However, drylands typically experience water shortages due to unbalanced atmospheric water …
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Development of Nitrogen rate Recommendations for No-till Dryland Grain Sorghum in Virginia
… full-season N fertilizer recommendations for dryland no-tillage grain sorghum (Sorghum bicolor L. Moench) production. The objectives of this study were: (i) to determine the optimum rate of band-placed starter N fertilizer needed in combination with side-dress N applications to achieve …
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Form and function: quantifying geomorphic heterogeneity and drivers in dryland non-perennial river corridors
… commonly focused in perennial watersheds to dryland, ephemeral streams. Based on a synthesis of current literature identifying ephemeral stream floodplain characteristics in drylands, a set of floodplain styles emerge dependent on confinement and the presence of channelized flow. Functions …
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Effects of polyacrylamide (PAM) and gypsum on irrigated and dryland potatoes (Solanum tuberosum L.).
… higher from irrigated (189 kg DM ha⁻¹ d⁻¹) than dryland plots (174 kg DM ha⁻¹d⁻¹). This reflected differences in leaf area index at two times during the later growth period. Mean crop growth rate, as a result, was also lower (118 kg DM ha⁻¹ d⁻¹) compared to irrigated plots (130 kg DM ha⁻¹ d⁻¹). …
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The nitrogen nutrition of maize on dryland soils of the central Orange Free State
… vary considerably in the nitrogen supply to dryland maize. In some localities the soil supplies adequate amounts of nitrogen so that nitrogen fertilizer does not lead to any growth response. In other localities soils are poor in nitrogen and require nitrogen fertilizer for maximUIll grain …
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Historical consideration of environmental dynamics in the identification of dryland degradation in Northern Damaraland
Dryland degradation is widely viewed as a major environmental issue and in many parts of Namibia is perceived to be significant to severe. In recent years, however, following a worldwide trend, there has been a re-evaluation and questioning of the extent, nature and causes of dryland degradation. …
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Yield and water use efficiency of different plant populations of dryland corn and sorghum
Two field experiments were conducted at the Tidewater Agricultural Research and Extension Center, in Suffolk, Virginia, during summer 1994, on a Uchee loamy sand (fine, loamy, siliceous, thermic Arenic Hapludult) with relatively low water holding capacity. The objective was to determine the effect …
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Projection of State Power: State-making in the Dryland Periphery of Ethiopia, Kenya, and Uganda
… their presence and power in the long-neglected dryland region that straddles the three countries’ borders. Such efforts to project the power of states across their territories are an essential aspect of state-making but have attracted relatively little scholarly attention. Extension of state …
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Lithological and climatic controls on fluvial landscape evolution of a post-orogenic dryland mountain belt
… drivers of landscape evolution. In addition, dryland conditions in low to mid-latitude settings with negligible glacial ice cover result in fluvial processes forming a primary agent of erosion. This thesis investigates the lithological and structural control on long-term fluvial mountain …
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Assessing climate change impacts and agronomic adaptation strategies for dryland crop production in southern Africa
Dryland farmers in southern Africa operate under harsh conditions; infertile soils, erratic rainfall regimes, sub-optimal input levels etc. Crop yields have generally been low, negatively affecting food security and livelihoods. Climate change is anticipated to aggravate these already existing …
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Reconstructing and interpreting ancient crop management practices : ethnobotanical investigations into traditional dryland farming in northern Jordan.
This study is an exploration of agricultural decision-making and an investigation into the effects of different crop management practices on weed composition. The aim of this research is to enable the reconstruction of ancient crop management practices from archaeological weed assemblages and to …
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