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Showing 1 to 20 of 78 for “"parent material"”.
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Taxonomy, genesis, and parent material distribution of high- elevation forest soils in the southern Appalachians
… in these areas despite widespread differences in parent material and local geology. This similarity is the result of physical mixing of these soils by climatically-driven slope processes. A considerable amount of chemical variability exists in these soils which is not expressed in morphological …
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SOIL QUALITY INDICATORS AND VEGETATION RESPONSES FOLLOWING ECOLOGICAL RESTORATION THINNING OF PONDEROSA PINE ON THREE SOIL PARENT MATERIAL TYPES UNDER GRAZING AND NON-GRAZING IN NORTHERN ARIZONA
… were affected by forest treatment type, soil parent material type, grazing treatment, and measurement year, depending on life form, longevity, and nativity. As observed by Abella et al. (2015), responses were hierarchically controlled, with soil parent material type often moderating vegetative …
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The Origin of Dark Mats at the Sunrise Ridge Borrow Pit Site (45PI408) Mount Rainier National Park, Washington
… history of the dark mats, notably their unknown parent material, depositional environment, and relationship with adjacent tephra strata. Stratigraphic samples from excavation units, features, and one off-site excavation unit was used to investigate these data gaps. Grain size, chemistry, organic …
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Mode I Fracture Toughness Testing of Friction Stir Processed HSLA-65
… regions were sampled, in addition to un-welded parent material. All elastic-plastic fracture toughness values were thickness dependent. For welds produced at 340 RPM, toughness ranged from 33% to 75% below parent material. By increasing the rotational speed to 490 RPM, weld toughness was …
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Post-fire Mechanical Properties of Aluminum Alloys and Aluminum Welds
… Post-fire exposure is considered heating the material to a particular temperature then cooling the material back to room temperature. The research included evaluating parent materials as well as welded samples. Post-fire mechanical properties of parent materials were evaluated at temperatures …
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Effects of Ponderosa Pine Ecological Restoration on Forest Soils and Understory Vegetation in Northern Arizona
… treatments on three different soil/geologic parent material types near Flagstaff, Arizona, twelve years after tree thinning and grazing exclosure treatments were applied. Several measured soil properties, such as soil respiration and temperature, were also evaluated in this study. Species …
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Evaluation of pre-taxonomy soil surveys
… units were determined by evaluating slope, parent material, and landscape position for each traversed delineation. Based on a binomial distribution, a numerical rating was used to evaluate each delineation. Out of 89 total delineations, there were 70, 71, and 81 successful observations with …
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Grain Boundary Character Distribution in the HAZ of Friction Stir-Processed Al 7075 T7
… resistance properties when compared with the parent material. Corrosion attack in this region of the weld is primarily intergranular and is associated with the presence of precipitate free zones. Current TEM research conducted at Brigham Young University by Dr. Bin Cai finds a correlation …
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Response of Pinyon-juniper woodlands to fire, chaining, and hand thinning
… space, the treated plots were well grouped by parent material. These results informed a Poisson generalized linear model that found parent material factorized explained 86.5% of the deviance in cheatgrass (Bromus tectorum) cover at the treated plots. The projects on soils derived from welded …
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Local structure analysis of solid state ionic conductors, perovskite-derived structures by NMR and computational studies
… ions in solid oxide fuel cell (SOFC) electrolyte materials with perovskite and perovskite-derived crystallographic structures, i.e. $Ba_{2}In_{2}O_{5}$, $Ba_{2}(In_{1-x}Ga_{x})_{2}O_{5}$ and $Ba_{2}In_{2}O_{4}(OH)_{2}$, were investigated for their high ionic (O2– and H+) mobility at elevated …
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Biology, Epidemiology, and Management of Spring Dead Spot of Bermudagrass
… yet O. narmari was not. Cultivars in which parent material originated from the midwestern United States had predominantly O. herpotricha and cultivars in which the parent material originated from the southeastern United States had predominantly O. korrae. In vitro and in situ fungicide …
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Morphology, Mineralogy, and Hydrology of Soils in the Triassic Culpeper Basin of Maryland
Soils derived from red parent materials are problematic in terms of morphologically assessing their hydrology because these parent materials are known to retard the development of redoximorphic features within their sola. This retardation phenomena may lead to misinterpretations of these soils for …
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A reassessment of the genesis of the Sangamon stone line and texture contrast profile in McDonough County, western Illinois
… soils with stone lines are developed in two parent materials where the stone line separates an underlying, truncated, often fine-textured autochthonous subsoil from a younger, overlying coarse-textured allochthonous hillslope deposit. The hillslope deposit commonly possesses upper solum …
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Manganese in Virginia soils and correction of manganese deficiency in soybeans (Glycine max L.)
… were found between soils varying in drainage. Parent material and time appear to be the soil forming factors that exert the largest influence on total soil Mn. Further research is necessary to fully characterize soil Mn in these broad physiographic regions.
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Soil-vegetation relationships of a bitter-brush-sagebrush association in northwestern Colorado
… sagebrush (Artemisia ~•) association on a single parent material. The effort was directed toward isolating those soil characteristics which are most valuable as indicators of potential vegetation production. Detailed soil and vegetation data were collected from 22 stands, all occurring on a sandy …
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Zinc in potato production
… are reported to be localized in areas where the parent material of soil is low in zinc content or where the topsoil has been removed by landleveling or lost through erosion. There is evidence that zinc plays an important role in the synthesis of tryptophane, an amino acid that is necessary for …
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Coupled Elastic-Plastic Thermomechanically Assisted Diffusion: Theory Development, Numerical Implementation, and Application
… composed of an immobile, but deformable, parent material and a dilute mobile constituent. The resulting equations are cast into a finite element formulation for incorporation into a finite element code. This code serves as a tool for modeling thermomechanically assisted phenomena in …
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SOIL ORGANIC CARBON IN MID-ATLANTIC REGION FOREST SOILS: STOCKS AND VERTICAL DISTRIBUTION
… region/landform, drainage class and parent material.
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Soils and soil clay mineral formation in the Virginia Blue Ridge and Piedmont provinces
… profiles and petrographic examinations of the parent rocks reveal that even after prolonged chemical weathering, physical and mineralogical differences exist between soil types which are due largely to changes in the parent rock, and to a lesser extent changes in the topography. Soils developed …
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Geochemical study of soil salinity in a toposequence near Riebeeck West, South Africa
… by silcrete and alluvium while Malmesbury shale parent material underlies the rest of the profiles. Contour drains disrupt the natural shape of the slope. The soil texture is loamy sand to clay loam at the crest and loamy to sandy-clay loam in the midslope. Mineralogy at the crest is quartz …
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