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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 25 for “"plant competition"”.
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Influence of soil water regime on nitrogen availability and plant competition in wet meadows
… between water regime, nitrogen availability and plant competition.Three coexisting meadow species: meadow fescue, <i>Festuca pratensis</i>, common sedge, <i>Carex nigra</i> and greater burnet, <i>Sanguisorba officinalis</i>, were used to study the consequences in plant …
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Multiple stresses by insect and plant-competition on growth and productivity of Canada thistle
… to determine what levels of the herbivore and plant competition are needed to suppress Canada thistle. Field studies were conducted to determine the effects of multiple stresses caused by defoliation and plant competition on growth and survival of Canada thistle (<i>Cirsium arvense</i> Scop.). …
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Growth Effects of Light and Plant Competition in a High Yield Environment (Soybeans; Zea Mays)
Studies were conducted to determine the effects of light in a high yield environment on corn Zea mays L.) yields and nutrient uptake, and to explain these effects based on changes in physiology, ontogeny, and physical characteristics. Strip intercropping was experimented with as a possible cultural …
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Evaluation of Single-Ear and Multiple-Ear Corn Types With Respect to Plant Population, Plant Competition, and Light on Agronomic Characteristics and Utilization of Stalk Soluble Solids
Made available in DSpace on 2014-12-12T00:17:42Z (GMT). No. of bitstreams: 1 7114792.pdf: 8221020 bytes, checksum: 0d205742caf7b44f6125fc4276b491ef (MD5) Previous issue date: 1970
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The Effect of Environmental Factors on High Corn Yields (Light, Planting Pattern, Row Width, Nutrients)
… with field studies using supplemental light, planting patterns, and plant competition.
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Genetic gain X management interaction in soybean: seeding rate effect
Plant breeders have increased genetic yield potential of soybean during the past century. The plant characteristics which soybean breeders have selected that have contributed most to those yield gains are not well understood. The hypothesis states that plants from recently released cultivars can …
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Factors affecting root system response to nutrient heterogeneity in forested wetland ecosystems
… space and time at scales relevant to individual plants, and plants can respond by selectively proliferating their roots within nutrient-rich patches. However, many environmental factors may increase or decrease the degree of root proliferation by plants. I explored how soil fertility, nitrogen …
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Trophic dynamics in the fine-root based food web: integrating resource heterogeneity, root herbivores, and root foraging
… are heterogeneously distributed. We know that plant species differ in their root responses to nutrient patches and that these differences in foraging can influence plant competition. However, most studies of root-resource interactions overlook the potential top-down influence of root …
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Community- and species-level consequences of competition in an unproductive environment: an experimental approach using boreal forest understory vegetation
… that investigate the hotly debated role of competition in structuring communities in unproductive habitats. The studies were done in a boreal forest understory plant community in the southwestern Yukon. The first study was a traditional neighbour removal experiment. Ten of the most common …
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Evaluating blanket mire vegetation recovery following hydrological restoration, with specific focus on the influence of Molinia caerulea
… at the near surface within 7-10 years, but plant competition from dominant Molinia caerulea tussocks remains a measurable constraint. M. caerulea tussocks create significant warming and desiccating effects, with larger tussocks and higher densities amplifying temperature and moisture …
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Management of higher populations in maize
While increasing plant density is a promising strategy for higher grain yield in maize, high plant populations must be managed to lesson plant competition. Previous research has focused on different management strategies for higher plant densities, mainly row configuration, but rarely a combination …
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Composition of the woody plant understory of plateau live oak (Quercus virginiana var fusiformis) clusters in a central Texas savanna
Plateau live oak is thought to act as a nurse plant to other woody species on the Edwards Plateau of central Texas; however, little is known of the nature, extent and duration of this facilitation. In this study, a comprehensive assessment of the composition and abundance of understory woody plants …
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Seeing the light: germination, growth and flowering responses in wildflowers under artificial nighttime lighting
… due to outdoor lighting technologies on wild plant communities, despite the fact that plant growth and development are under photoperiodic control. The present study evaluated the effects of photoperiod extension that comes from cool white light-emitting diode (LED) street lighting at …
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Efficacy of Riparian Revegetation Projects in the Inland Pacific Northwest
… 36 monitoring reports were the need to select plant material and planting techniques that are well suited to the site, and the need for ongoing maintenance to reduce impacts due to environmental factors such as herbivory, plant competition, moisture, erosion/flooding/scour, and coarse …
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Efficacy of Riparian Revegetation Projects in the Inland Pacific Northwest
… 36 monitoring reports were the need to select plant material and planting techniques that are well suited to the site, and the need for ongoing maintenance to reduce impacts due to environmental factors such as herbivory, plant competition, moisture, erosion/flooding/scour, and coarse …
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The growth and productivity of ribes nigrum under various levels of shade and the implications for multifunctional woody polycultures
… The understory is a unique habitat with intense plant competition for nutrients and water, and most importantly, light. While much is known about plant response mechanisms in these environments, little is known about how crops may perform in these environments. Black currants have been proposed …
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The ecology of Namibian fairy circles and the potential role of sand termites (Psammotermes allocerus Silvestri) in their origin
… insects, and competitive interactions between plants ('self-organisation'). Fairy circles are perhaps the most archetypal of these patterns, taking the form of evenly-spaced, circular to elliptical barren patches 2-12m in diameter. They occur in dense fields within sandy, species-poor …
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Impact of nutrient heterogeneity on plant response and competition in Coastal plain species
… < r < 0.17). In two-species plots, interspecific competition was influenced by soil heterogeneity in two of six cases tested (P < 0.05), and precision was the behavior most correlated with competitive success. In six-species plots, spatial pattern of nutrients had no influence on aboveground …
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Factors possibly inhibiting growth of herbaceous plants in the understories of Eucalyptus cinerea
… soil beneath Eucalyptus stands. The effects of plant competition for light, water and nutrients cannot totally be ignored when factors affecting the growth of herbaceous layer species under Eucalyptus understories are considered. For example, Lamont (1985) demonstrated that allelochemicals …
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