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 13 of 13 for “"Vegetation Control"”.
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Forest Harvesting Disturbance and Site Preparation Effects on Soil Processes and Vegetation in a Young Pine Plantation
… loblolly pines (Pinus taeda L.) in response to controlling non-crop vegetation is well documented. However, the beneficial effects of non-crop vegetation on soil quality, nutrient cycling, and biodiversity have not been thoroughly explored. A study was conducted to determine the effects of …
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Destination of Isotopic Nitrogen Fertilizer Under Varying Herbicide Regimes in a Mid-Rotation Loblolly Pine (Pinus taeda L.) Plantation in the Piedmont of Virginia, USA
Mid-rotation fertilization and vegetation control are some of the most common silvicultural treatments in loblolly pine (Pinus taeda L.) plantations in the southeastern United States. Competing vegetation is commonly thought to sequester fertilizer nitrogen (N) and reduce the potential growth …
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Effects of understory vegetation manipulation on hardwood regeneration recruitment and growth in southern Appalachian forests
… of oak advance regeneration. Understory Vegetation Control was conducted in 1994 in average quality (SI₅₀ 17.7 - 21.9 m for upland oak) southern Appalachian forest stands to determine the effects on oak (<i>Quercus</i> spp.) and maple (<i>Acer</i> spp.) advance seedling abundance, growth, …
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Pollinator Abundance at Solar Farms in Alberta, Canada
… Edges of solar sites experience less frequent vegetation control which could create an edge effect and influence how bees assemble within a solar site. Four solar farms in Alberta, Canada were sampled using pan and vane traps to collect bee abundance data along transects at three distances from …
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Effects of prescribed burning, mechanical and chemical treatments to curtail rhododendron dominance and reduce wildfire fuel loads
… loading within an R. maximum thicket and the control of R. maximum as a forest weed. The final objective of the project was to determine the cost effectiveness of each implemented treatment. Due primarily to moisture conditions, a single prescribed burn was relatively ineffective in reducing …
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The influence of submerged aquatic vegetation on trophic relationships of largemouth bass
Aquatic vegetation is considered a nuisance in many lakes and reservoirs supporting largemouth bass populations, and control (eradication) of vegetation is often undertaken. Yet, the relationship between submerged aquatic vegetation and adult largemouth bass, from a trophic standpoint, is poorly …
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Relationships between loblolly pine (Pinus taeda L.) yield and woody plant diversity in Virginia Piedmont plantations
… to determine the effects of competition control on loblolly pine (<i>Pinus taeda</i> L.), woody plant diversity, and wildlife habitat quality in Virginia Piedmont plantations 12-14 and 24-27 years of age. The responses of loblolly pine and competing woody vegetation in plantations 12-14 …
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Modeling General Response to Silvicultural Treatments in Loblolly Pine Stands
… for effects of thinning, fertilization, and control of competing vegetation. Chapman-Richards functions were used to model the base-line growth. Separate response functions to mid-rotation thinning and fertilization effects were developed. The thinning response function was based on duration …
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Prescribed Fire Perspectives of African American Landowners in Alabama, Florida, and Georgia
… such as hazardous fuel reduction, undesired vegetation control, timber stand improvement, pest and disease reduction, and aesthetics. These individuals faced unique potential limitations including a lack of relevant information regarding prescribed fire permits, smoke management, safety, and …
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Impact of Weed Control and Fertilization on Growth of Eastern White, Loblolly, Shortleaf, and Virginia Pine Plantations in the Virginia Piedmont
… practices such as woody competition control and fertilization in the Piedmont Province of Virginia is unclear. To address this issue, during 1999, a mixed stand of Virginia pine and hardwoods was clearcut and site-prepared by herbicide application. Three replications containing strips …
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The Effect of Grass Carp Introduction on Aquatic Vegetation and Existing Fish Populations in Two Small Prairie Lakes
… 2.3 hectare Prior Lake in South Dakota, aquatic vegetation coverage and height in the water column were significantly lower (P<0.005). During the same two year period, triploid grass carp did not significantly reduce aquatic vegetation coverage or height in the water column in 11.4 hectare East …
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Loblolly Pine Growth and Competition Response to Varied Chemical Site Preparation Treatments 14 Years After Establishment in the Piedmont of Virginia
… methyl (SMAX) which targets herbaceous vegetation. Half of all treatments, including the check and release, received a year-one weed control treatment (H) of imazapyr and SMAX. Pines were measured every few years, including the latest measurement in year 14 (2019). Competing hardwood …
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Il ruolo della vegetazione sui processi idrologici di ecosistemi Mediterranei in condizioni idriche limitanti
… In the next step the contrasting influences of vegetation differences (grassland versus mixed ecosystems) and soil differences (deeper alluvial valley soils versus shallow upland soils) on evapotranspiration (ET) and CO2 exchange dynamics have been examined. Data from two representative case …