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 17 of 17 for “"Soil taxonomy"”.
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An examination of geographic patterns of soil climate and its classification in the U.S. system of soil taxonomy
<p>Soil climate, the record of temporal patterns of soil moisture and temperature, is an important component of the structure of U.S. Soil Taxonomy. The U.S. Soil Survey has used the Newhall Simulation Model (NSM) for estimating soil climate from atmospheric climate records at weather stations …
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Soil and permafrost distribution, soil characterisation and soil vulnerability to human foot trampling, Wright Valley, Antarctica
Soils and shallow permafrost in Wright Valley, Antarctica were mapped at a scale of 1:50 000 to depict their spatial distribution, and sampled to determine the main drivers for the soil classification. In the cold desert of Wright Valley the Gelisol order of Soil Taxonomy was used to classify the …
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Pedogenesis, Inventory, and Utilization of Subaqueous Soils in Chincoteague Bay, Maryland
… evaluate the suitability of existing subaqueous soil-landscape models, develop a soils map, and demonstrate the usefulness of subaqueous soils information. Bathymetric data collected by the Maryland Geological Survey in 2003 were used to generate a digital elevation model (DEM) of Chincoteague …
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Cadmium accumulation in agricultural soils
Cadmium (Cd) has accumulated in New Zealand (NZ) soils as a result of phosphate fertiliser application. Cadmium is a biotoxic heavy metal and can be adsorbed by soil and enter the human food chain. Three objectives were investigated in this thesis: 1. Determine if the distribution of Cd varies …
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The geography of fragipan soils in the eastern United States
The Soil Taxonomy definition for the brittle, compact subsoil horizons known as fragipans is vague and processes responsible for fragipan formation are poorly understood. Ambiguities in the fragipan definition have resulted in a lack of consistency in the interpretation of fragipan characteristics. …
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Characterization and quality of soils developing on a mountaintop removal coal mine
… in recent years. Therefore, this study evaluated soil development on different aged mined lands. Four different ages (2, 7, 11, and 23 years) of minesoils and two different slope classes, nearly level to gently sloping and steep to very steep, along with three contiguous native soils on a …
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Characterization, classification, and genesis of Cullen soils from the Virginia Piedmont
The Cullen soil series concept in the Virginia Piedmont has been the subject of much debate. This series was originally named Lloyd and was mapped throughout the southeastern Piedmont. In 1969 the Lloyd series was deactivated because of conflicting concepts. The Cullen series was established in …
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Sedimentology of historic and prehistoric deposits in the drainage basin of Deep River and Muddy Creek on the Piedmont of North Carolina
… trenches dug at four floodplain localities. Soils in these trenches were described using standard soil taxonomy and sampled for particle-size, magnetic susceptibility, and mineralogical analyses.;Increased upland erosion rates, after European settlement, left more than a meter of historic …
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Evaluation of pre-taxonomy soil surveys
A 1954 soil survey of Bland County, Virginia, was evaluated to determine if remapping was required to meet current soil survey standards. Considerable savings of time and money may be realized if a complete remap was not required. Ten random transects were chosen to study soil landscape units which …
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Analysis of Reconstructed Mine Soils on Reclaimed Coal and Mineral Sands Mined Lands in Virginia
… use potentials are greatly influenced by mine soil properties. I analyzed and classified coal mine soils in SW VA and mineral sands mine soils in SE VA to aid development of appropriate post-mining land use interpretations. For coal mine soils, long-term pedogenesis was assessed in sandstone …
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Distinguishing the hydrologic regimes and vegetation of fens and wet meadows in the Rocky Mountains
… and ecosystem functions. Organic vs. mineral soil layer classifications, hydrologic regime and vegetation indicators have been used to distinguish fens from wet meadows, but complex interactions between physical and environmental variables can make identifying wetland types challenging. …
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El potencial agrológico y su consideración en la ordenación del territorio. El caso de Asturias
… genéticas (clasificación de Kubiena), objetivas (Soil taxonomy) y utilitarias (Clases agrológicas). 2. ORTEGA MONTEQUÍN, M. (2016): “El consumo de suelo natural por la expansión urbana y las grandes infraestructuras en Asturias”, en VVAA: Los escenarios económicos en transformación. La realidad …
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Definición de un Modelo Edafogeomorfológico para la Identificación de Necesidades de Manejo y Recuperación de Suelos a Nivel Local. Caso Cuenca Cañada La Gorda, Machiques Colón, Estado Zulia, Venezuela.
… the identification of management requirements of soils, a study was carried out in the area of the Cañada La Gorda watershed, Machiques Colon, Zulia State with a tropical climate, subsumid conditions with a growing period of 230 days, an Ustic soil moisture and Isohypertermic regimes. The soils …
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The Application of Pedology, Stable Carbon Isotope Analyses and Geographic Information Systems to Ancient Soil Resource Investigations at Piedras Negras, Guatemala
… studies and stable carbon isotope analysis of soil organic matter, combined with Geographic Information Systems (GIS) are three tools that can be used to answer crucial questions as to how the Maya managed their soil resources.</p> <p>GIS maps that indicated areas of best agricultural potential …
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CARBON AND NITROGEN CYCLING IN GIANT CANE (ARUNDINARIA GIGANTEA (WALT.) MUHL.) RIPARIAN ECOSYSTEMS
… riparian ecosystems, resulting in increased soil erosion, poorer water quality, and reduced flood control. Cane's ecological importance has led to an increased interest in canebrake restoration in riparian zones. To examine the role that cane plays in nutrient cycling and to attempt to …
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Uso sostenibile dei suoli forestali di ambiente costiero in relazione ai fattori di pressione esistenti
… tipi di suoli presenti, classificati secondo la Soil Taxonomy, sono risultati essere Mollic/Sodic/Typic Psammaquents nelle zone interdunali, Typic Ustipsamments sulle sommità dunali e Oxiaquic/Aquic Ustipsamments negli ambienti morfologici intermedi. Come sintesi della caratterizzazione …
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The Maya Footprint: Soil Resources of Chunchucmil, Yucatan, Mexico
… Yucatán are constrained by climate, thin soils, and low fertility. Despite this, the ancient Maya city of Chunchucmil Yucatán, Mexico, boasted an immense, dense, and wealthy population during the Middle Classic period (ca A.D. 400-700). Soil physical and chemical properties were explored …