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Showing 1 to 18 of 18 for “"slope position"”.
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Soil Influence on Forest Vegetation Productivity and Patterns in the Eastern Cascades of Southern Oregon
… can have changes in soil and vegetation across a slope, aspect, slope position, microtopography, and elevation. The objective of this project was to assess what soil characteristics influence vegetation productivity, patterns, and species. The study area for this project is located in the dry …
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Variability of soil erodibility: its relationship to topography and soil properties in cultivated landscape
… to measure the relative soil erodibility at five slope positions along eleven slope transects on fallow agricultural land in hummocky terrain. Soil erodibility variations among the five slope units were examined for significant differences. The slope units were found to be ranked in descending …
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Factors influencing basal area growth of yellow-poplar ( Liriodendron tulipifera L.) in central West Virginia
… as related to four topographic factors (aspect, slope position, steepness, and landform), two competition variables (basal area per acre and trees per acre) and four tree characteristics (age, diameter, total height, and crown diameter). These variables were plotted against basal area growth per …
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Soil and plant water stress in an Appalachian oak forest: its relationship to topography and forest site quality
… based on topographic parameters of aspect, slope inclination and slope position was used to investigate soil moisture and plant water stress relationships on the southeast face of Potts mountain in Craig County, Virginia. Topographical effects on available water are especially pronounced …
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Geographic Information System Topographic Factor Maps for Wildlife Management
… landform measurements and maps for elevation, slope, aspect, landform index, relative phenologic change, and slope position for 3 topographic quadrangles in Virginia. A set of known observation points of the Northern dusky flying squirrel (Glaucomys sabrinus) was used to build 3 models to …
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Forage Production and Nutritive Value in a Temperate Appalachian Silvopasture
… predominantly tall fescue pasture. Across a 12% slope, trees were planted to create treatments of low, medium, and high tree densities at shoulder, mid, and toe slope positions within plots of honey locust and black walnut. Sampling sites (n=54) under tree density and slope position combinations …
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Growth of juvenile lodgepole pine in relation to soil and slope
… stand. The study area was subdivided into seven positions. Twelve dominant or codominant trees were cut on each position and each tree was subjected to a stem analysis. Three soil pits were dug on each position and soil samples collected from each horizon. A mechanical analysis of the soil was …
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Assessment Of Natural Roost Availability And Artificial Roost Preference By Indiana Bats In Scott County, Kentucky
… I also characterized the forest overstory composition and determined the quantity and quality of Indiana bat roosting habitat across the landscape. My field site was Veterans Memorial Wildlife Management Area (VMWMA) in Scott County, Kentucky, which contains 74% forest cover, 26% open …
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Vegetation distribution and site relationships in an Appalachian oak forest in southwest Virginia
… including elevation, lithology, landform, slope position, steepness, exposure, and soil depth appeared to influence the distribution of individual species and community types through their effect on local moisture and temperature conditions. Different site factors best explained the …
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Incorporating GIS topographic information in forest inventory estimates
… be correlated to such topographic variables as slope, aspect, slope position, slope shape, and elevation which can be produced through the manipulation of a digital elevation model. More precise estimates can be achieved through a procedure which utilizes the 100% sample of this information as …
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Multifunctional woody polycultures and their influence on soil organic carbon
… in three MPW treatments varying in species composition and stand density (inter-seeded with a grass-legume pasture) and control were resampled. Stocks of SOC increased within the 0-60 cm depth in the 3- and 4-species (3-Sp and 4-Sp) treatments as well as the 3-Sp planted at double density …
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Relationship of understory development in thinned loblolly pine plantations to overstory structure and site characteristics in the Virginia Piedmont
Understory forage production, species composition, and nutrient concentrations were studied in relation to overstory structure and site characteristics in thinned loblolly pine (Pinus taeda) plantations in the Virginia Piedmont. Stands exhibited a wide range in overstory basal areas (18.8 to 43.5 …
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Ground-penetrating radar images of a dye tracer test within the unsaturated zone at the Susquehanna-Shale Hills CZO
… paths in the shallow, unsaturated zone on hillslopes in two adjacent watersheds within the Susquehanna-Shale Hills Critical Zone Observatory (CZO). At each site we injected about 50 L of water mixed with brilliant blue dye (4 g/L) into a trench cut perpendicular to the slope (~1.0 m long …
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Infiltration controls in a tallgrass prairie at a hillslope scale
… controls of land use, land cover, soil texture, slope position, slope gradient and slope aspect are a few of the variables influencing infiltration capacity within a uniform soil type. The goals of the thesis are to (1) quantify the spatial distribution of soil hydraulic properties at the surface …
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Biogeomorphology and soil geomorphology of small semiarid basins, northeastern Arizona : influences of topoclimate and climate variations
… erosion and plant community establishment on hillslopes in this semiarid environment. In small basins formed at the base of Black Mesa escarpment west of Chinle, Arizona, Jurassic sandstones cemented mainly by clay minerals weather by hydration, favoring relatively high erodibility. Two end member …
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Compression wood formation in Pinus strobus L. following ice storm damage in southwestern Virginia
… using image analysis software. Topographic data (slope, aspect, and elevation) were also recorded for each P. strobus tree, along with a modified competition index. Wood anatomical features were also quantified in the three years before and after the storm along a tree diameter gradient. Although …
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Determining the potential drivers of invasive C4 grasses at De Hoop Nature Reserve, South Africa
… to examine the extent to which topographic position along a slope (moisture availability), an increase in nutrient availability and a decrease in competition for resources influences the establishment and growth of C4 grass. To do this I transplanted tufts of Setaria sphacelata var. torta in …
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Analysis of soil erodability and rainfall erosivity on the Soutpansberg Range, Limpopo Province, South Africa
… of geomorphic features needed soil, hydrology, slope, geology and land-use-land-cover data. Soil data were obtained from the Harmonised World Soil Database (HWSD v 1.21) layer downloaded from The International Institute for Applied Systems Analysis (IIASA) online database. Additional soil data …