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 20 of 70 for “"bare ground"”.
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The Survival and Development of Ancylostoma Caninum on Pasture, Bare Ground, Pea Gravel and Concrete
Made available in DSpace on 2014-12-12T01:27:46Z (GMT). No. of bitstreams: 1 7500361.pdf: 5157187 bytes, checksum: fb806789c7a34cf576b8c06129511108 (MD5) Previous issue date: 1974
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Water use of Pinus radiata D. Don on bare ground at the Lincoln agroforestry experiment, Canterbury, New Zealand
… trees of Pinus radiata genotypes grown in bare ground during early summer (September 14 to 30 November) 1994. The predawn and mid-day plant water potential of two genotypes was also evaluated. Soil water storage was monitored weekly using Time-domain Refletometry (TDR) Model 3333 and …
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Mapping desertification: towards an approach for mapping regional land degradation in drylands
… the three states (perennial plant cover and bare ground cover) were identified. A total of 16 remote sensing variables were determined for the project area. Five vegetation indices (NDVI, EVI, SAVI, OSAVI, MSAVI), as well as spectral mixture analysis (SMA) cover estimates for perennial …
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Hydric soil properties as influenced by land-use in Southeast Virginia wet flats
… three landuse treatments (forest, field, and bare ground) at two restored wet flats in the thermic Great Dismal Swamp ecosystem. The forest was driest treatment. The forest air was the warmest in winter and coldest in summer, opposite of the bare ground. The forest soil at 50 cm was the …
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Plant Community Responses to Long-Term Seasonal Bison Grazing in the Dry Mixed Grassland of Saskatchewan
… species diversity, evenness and richness; bare ground cover; and indicator species in three treatment areas. The results show there is a statistically significant difference in plant community response to seasonal bison grazing. Notably, species diversity, species evenness, and bare ground …
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Effects of severe cattle treading on soil physical properties and pasture productivity
… (K_40), surface roughness, depths of pug prints, bare ground area, ryegrass tiller density, and herbage accumulation. Soil dry bulk density and total porosity did not change, even under the severest of treading damage, because decreases in macroporosity were offset by increases in microporosity …
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Sagebrush Ecosystem Characterization, Monitoring, and Forecasting with Remote Sensing: Quantifying Future Climate and Wildlife Habitat Change
… derive four primary continuous field components (bare ground, herbaceousness, litter, and shrub), and four secondary components (sagebrush, big sagebrush, Wyoming sagebrush, and shrub height) using a regression tree. An independent accuracy assessment of results revealed the primary component root …
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Exploring sensitivities of latent heat parameterizations using a coupled, integrated hydrologic model
… Precipitation, runoff, condensation and groundwater flow are also significant members of the hydrologic cycle, but it is evapotranspiration that links water in the subsurface to water on the land surface or in the atmosphere. Hydrologic models use parameterizations to represent the …
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Evaluation of Mob Grazing and its Impacts on Soil Moisture and Temperature and Litter Decomposition in South Dakota
… to the extremes of the spectrum: Ungrazed and Bare ground plots. This study was conducted at four producer locations in South Dakota, near Quinn, Chamberlain, Eureka, and Volga in 2013 and 2014. Each study site had different stocking densities at various times of the growing season and differed …
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Quantification of spray drift from aerial applications of pesticide
… The effects of spray quality, atomizer type and ground cover were examined. Initial airborne drift amounts were greater than downwind deposits, thus not all of the drifting spray was deposited in the measuring area. Total off-target movement of spray was significantly greater for Fine compared to …
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… to the conversion of vegetated areas to bare ground or water in the case of new development, and conversion from bare ground or water to vegetation in areas that have been consistently developed.
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… to the conversion of vegetated areas to bare ground or water in the case of new development, and conversion from bare ground or water to vegetation in areas that have been consistently developed.
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Exploring sensitivities of latent heat parameterizations using a coupled, integrated hydrologic model
… Precipitation, runoff, condensation and groundwater flow are also significant members of the hydrologic cycle, but it is evapotranspiration that links water in the subsurface to water on the land surface or in the atmosphere. Hydrologic models use parameterizations to represent the …
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An Ecological Study of Mourning Doves in a Cold Desert Ecosystem on the Idaho National Engineering Laboratory
… km. Mourning doves on the INEL are primarily ground nesters. Nesting success averaged 68% per year, with 1.8 fledglings produced per successful nest. Nesting densities averaged 0.02 nests/ha during the study. Three peaks in hatching occurred on the INEL: 1 during the fourth week of June, …
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Response of avian, arthropod, and vegetation communities to mid-contract management in Conservation Reserve Program tall fescue monocultures
… disked treatments increased the percentage of bare ground by burying the dead and dying vegetative biomass beneath the soil surface. However, spraying alone left large amounts of litter accumulation on the soil surface that resulted in a delay in the timing of some annual forbs to recolonize. …
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Prairie dogs, plants, and pollinators: tri-trophic interactions affect plant-insect floral visitor webs in shortgrass steppe
… pollinator habitat, specifically in terms of bare ground cover and floral resources, on northeastern Colorado's Pawnee National Grassland, in 2003 through 2005. I also measured changes in habitat utilization by insect floral visitors on and off prairie dog colonies, and assessed differences in …
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Granivory and Granivores in Native Grasslands and Agropyron Cristatum Stands in the Northern Great Plains
… Ant abundance increased with the covers of bare ground and litter. Granivory was related to variables such as forb cover and bare ground, which varied within both vegetation types. Yet, in spite of differences in plant species dominance and plant diversity between native grasslands and A. …
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Long-term Vegetation Change Before and After Converting from Livestock farming to Game Ranching in Asante Sana Game Reserve, South Africa
… at the expense of Grassland and Shrubland while Bare-ground has expanded into Shrubland and Thicket. A ground-truthing exercise revealed a significant (p<0.01, R2 = 0.6) positive relationship between the vegetation cover estimated on the ground and satellite derived SAVI values, suggesting that …
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Economic Impact Analysis of Mixed-Species Green Manure on Organic Tomato: Evidence from the Northeastern United States
… amendments. In Maryland and New York when bare ground was also used as a control, only mixed forage radish and hairy vetch in Maryland produced better returns compared to bare ground. A probit regression assessing the factors affecting the decision to adopt mixed species green manure …
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Evaluation Of Selected Spectral Vegetation Indices In Senescent Rangeland Canopy Using Landsat Imagery
… /ρ485) to estimate the amount of NPV and bare ground cover, respectively.</p>
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