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.
Results
Showing 1 to 11 of 11 for “"Semi-arid conditions"”.
-
Water use of mature pecan orchards under semi-arid conditions
… 14-year-old mixed cultivar pecan orchard in the semi-arid Northern Cape Province of South Africa. This is one of the hotter and drier pecan production regions in South Africa and was expected to differ from where most of the pecan water use research was conducted in the United States of America …
-
Analyzing and modelling of flow transmission processes in river-systems with a focus on semi-arid conditions
… of water resources planning and management in arid and semi-arid environments is the scarcity of hydrological data and, consequently, research studies. In this thesis, the hydrology of dryland river systems was analyzed and a semi-distributed hydrological model and a forecasting approach were …
-
Utilization of water and light resources by annual crops under semi-arid conditions when planted between Leucaena leucocephala (Lam.) de Wit hedgerows
Agriculture for rural communities in semi-arid areas is a risky exercise. The adverse weather conditions (high evaporative demand and low rainfall) of these regions, coupled with comparatively limited mechanization and often soil of poor chemical and physical constitution make crop production …
-
High Resolution Stratigraphy of Ordovician Carbonates, Kentucky: Evidence for a Greenhouse to Glacial Transition
… meter-scale cycles were deposited under warm, semi-arid conditions, under low amplitude sea level fluctuations on a relatively ice-free earth. The overlying Knox unconformity (~10 m.y. duration), formed by global eustatic sea level fall and tectonic uplift of the subducting margin at the onset …
-
Thermal and Diagenetic Evolution of Carboniferous Sandstones, Central Appalachian Basin
… periods and iron-oxide/oxyhydroxide during semi-arid conditions, reflecting differences in redox. Second, framework grain composition controlled the distribution of diagenetic alterations and quartz cementation in the burial environment. Lithic arenites are deficient in authigenic quartz, …
-
Phytolith Analysis as a Palaeoecological Tool for Reconstructing Mid-to Late-Pleistocene Environments in the Olorgesailie Basin, Kenya
… vegetation has hitherto been scarce, because the arid / semi-arid conditions are not conducive for preservation of organic plant microfossils. Phytolith analysis is used to reconstruct the vegetation history and understand hominin habitat preference during mid-late Pleistocene (~746-64 ka). A …
-
Agricultural water quality and biofilm formation in water storage containers and irrigation pipes linked to fresh produce safety
South Africa experiences semi-arid conditions and primary producers can therefore not be reliant on rainfall alone. They therefore also make use of water distribution systems to irrigate their crops from stored reserves. As access to superior quality irrigation water has decreased substantially …
-
Surface detection of alkaline ultramafic rocks in semi-arid and arid terrains using spectral geological techniques
… of alkaline and other ultramafic rocks from arid and semi-arid regions. To date these rocks have not been investigated spectrally in a systematic fashion using the latest field and airborne imaging spectrometers. The objective was to determine how spectral geological techniques could be used …
-
Designing Technosols to reduce salinity and water stress of crops growing under arid conditions : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy of Applied Science in Soil Science at Massey University, Palmerston North, New Zealand
… reported to contribute to water retention under arid conditions. Further potential amendments include organic residues, as they can produce beneficial impacts on plant growth by improving soil functions. To date, however, limited research has attempted to unravel (and compare) the effects of …