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Showing 1 to 20 of 39 for “"soil development"”.
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Time and soil development on lateral moraines, Martin River Glacier, south-central Alaska
<p>During the summer of 1966, eighteen soil profiles on a series of 21 lateral moraines, were studied to ascertain the relationship of time to soil development. The moraines are located on Charlotte Ridge on the south margin of the Martin River Glacier in south-central Alaska. The elevation of the …
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The effects of temperature and moisture on alpine microbial processes across a gradient of soil development
… and atmospheric nitrogen deposition are exposing soils to novel temperature regimes, melting alpine glaciers, altering precipitation patterns, and directly introducing bioavailable nutrients. Because microbial communities are important drivers of nutrient cycling and ecosystem function in the …
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Linking nitrogen biogeochemistry to different stages of wetland soil development in the Mississippi River Delta, Louisiana
… controlling nutrient biogeochemistry in wetland soils at different stages of development throughout the Mississippi River delta. In the older, transgressing Barataria basin, there was no clear effect of the climate-induced species shift from Spartina alterniflora Loisel to Avicennia germinans L. …
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Factors Influencing Development of Mollic Albaqualfs: Comparisons Within and Between Two Soil Development Sequences in Illinois
Made available in DSpace on 2014-12-10T17:12:50Z (GMT). No. of bitstreams: 1 7021065.pdf: 6571265 bytes, checksum: b7b25df0547941990b6e97c15614e27a (MD5) Previous issue date: 1970
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Fluvial processes, beaver activity, and climate in the greater Yellowstone ecosystem and rock type control on hillslope morphology and soil development in the Sandia Mountains, New Mexico
… 3 explores the role of rock type in hillslope soil formation and slope morphology in the Sandia Mountains of New Mexico. Resistant rock types have a profound impact on slopes by increasing the amount of coarse colluvium that traps and preserves eolian material. Accretion of eolian material …
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The impact of glaciation and climate change on biogeochemical cycling and landscape development
… 8.2 kyr event which resulted in a resetting of soil development. The higher temperatures returned after the 8.2 kyr event which allowed for continued soil development despite its drier climate. Previous research corroborated these conclusions. The Crystal Lake geochemical record was very …
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Geomorphic analyses of young faulting and fault behavior in central Nevada.
… and characterization and quantification of soil development associated with alluvial surfaces. Rates of fault scarp degradation were explored through diffusion-based modeling of latest Pleistocene pluvial shoreline scarps. Morphologic scarp age depends strongly on scarp size; modest …
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Woodland Restoration on Landfill Sites: Earthworm Activity and Ecosystem Service Provision
The addition of composted greenwaste (CGW) into soil-forming materials during land reclamation may improve tree growth, alleviate certain negative soil properties and provide an effective waste management solution. CGW addition may also assist the establishment of sustainable earthworm populations, …
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Catchment Structure Regulates Hydrodynamic Drivers of Chemical Weathering in Shallow Forest Soils
… where, when, and how subsurface flow affects soil processes and the resulting arrangement of soil development along flow paths is challenging. While hydrologic regime and soil solution acidity are known to influence weathering rates and soil transformation processes, an integrated …
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Adsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and models
… the composition of surface and groundwater, for soil development, and for the availability of plant nutrients. Sulfate adsorption at three pH levels was conducted on y-AI203 and kaolinite. The adsorption isotherms were described well by the simple Langmuir, two-site Langmuir, Freundlich, and …
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Morphology and development of the Red Rock Canyon alluvial fan, Clark County, Nevada
… relative ages of a chronosequence of calcic soils and pedogenic calcretes that underlie four surfaces identified on the Red Rock Canyon alluvial fan. All surfaces identified are formed of limestone alluvium, occur at elevations of 853 m, and share the same climate and vegetation. These …
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Soil Heterogeneity in Arid Shrublands: Biotic and Abiotic Processes
This dissertation investigates the evolution of soil heterogeneity on arid alluvial fans. Soil formation begins when depositional or erosional processes cease and a geomorphic surface becomes stable. The transformation of sediment to soil (pedogenesis) affects a multitude of hydrologic processes …
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Weathering Regimes and Pedogenic Variability on Large Boulders, Karkevagge, Northern Scandinavia
… (1) Clay content was marginally greater in soils developed on garnet-mica-schist than mica-schist; (2) Silt and clay content did not reflect eolian sediment input; (3) Soils that have formed on boulder tops are characterized as residual soils; (4) Deeper soils had developed overlying …
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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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Determining an Appropriate Organic Matter Loading Rate for a Created Coastal Plain Forested Wetland
… mid-Atlantic region are considerably lower in soil organic matter than native forested hydric soils. However, optimal loading rates for created wetland soil reconstruction have not been rigorously established. Our objective was to determine appropriate organic amendment loading rates for a …
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Septic regulations and suburban development patterns : an analysis based on soil data in Norfolk County, Massachusetts
… systems are fundamental elements of modern urban development. Decentralized, privately operated, on-site wastewater disposal systems have also played an important role in suburban and exurban development over the past fifty years. This research is an attempt to assess the current influence of …
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The Effect of Management on Erosion of Civil War Battlefield Earthworks
… War Earthworks while allowing public access. Soil erosion, both natural and human-induced, is a major concern facing the preservation of the earthworks. Currently, the National Park Service is committed to preserving these earthworks for future generations by determining which maintenance …
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Effects of Climate and Ecological Processes on Engineered Uranium Disposal Cell Performance with Respect to Nearby Subsistence-Based Indigenous Communities
… States. Disposal covers made from compacted soil layers stabilize waste consisting of a mixture of chemical and radiological constituents to limit air, soil, and water contamination above and below ground. However, 20 to 30 years post-construction, vegetative succession, dust deposition, and …
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Stratigraphic Distribution, Taphonomy, and Isotope Paleoecology of the Dinosaurian Fauna in the latest Campanian lower Horseshoe Canyon Formation, Alberta, Canada
… organic-rich mudrocks and coal, an increase in soil development, and changes in the dominant configuration for fossil preservation from sparse bonebeds to microsites. Climate change was also investigated through stable oxygen isotopes in tyrannosaur tooth enamel phosphate, which daily recorded …
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