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 73 for “"Greenhouse study"”.
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Evaluating Nitrogen Containing Controlled Release Fertilizers At Stand Establishment In Loblolly Pine
… release N fertilizers was evaluated in a greenhouse study and at two field trials in the Virginia Piedmont, in 2002 and 2003. The greenhouse study evaluated five fertilizer treatments; 1) check with no fertilizer; 2) granular ammonium nitrate (10-10-10 + micro-nutrients) applied to the …
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Starter Fertilizers for No-Till and Minimum-Till Corn
In a greenhouse study, the risk of injury from seed-placed fertilizers increased when soil temperatures increased from 61 to 67$\sp\circ$F. Wetting the root zone to field capacity within 48 hours after planting enhanced the effectiveness of seed-placed fertilizers by increasing early plant growth …
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Evaluating rhizodegradation of petroleum hydrocarbons and polycyclic aromatic hydrocarbons in wetland sediments containing spartina patens
… were grown in basin sediments during a field study and a greenhouse study over three consecutive growing seasons. Ninety percent (90%) survival was observed in field study plots containing sediments with <12% PHC. In the greenhouse study, planted and bulk sediments were monitored for PHC, PAH, …
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Effect of Intercropping and Trap Cropping on the Diamondback Moth, Plutella Xylostella L., Its Natural Enemies and Other Brassicaceous Pests, And, Studies on Diadegma Insulare (Cresson), the Major Diamondback Moth Parasitoid
… higher than in third- or fourth-instar hosts. A greenhouse study at varying parasitoid and host densities indicated that DBM larvae dispersed from host plants mainly by interspecific interactions with D. insulare, resulting in higher herbivory to infested and uninfested plants. (Abstract …
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Total nonstructural carbohydrate (TNC) flux of creeping bentgrass receiving sequential applications of growth retardants
… and paclobutrazol were treated in an initial greenhouse study but only trinexapac-ethyl was included in subsequent field and greenhouse experiments. Applications of trinexapac-ethyl (0.28 kg ha$\sp{-1}),$ flurprimidol (0.56 kg ha$\sp{-1}),$ and paclobutrazol (0.28 kg ha$\sp{-1})$ once, every 2 …
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Influence of Pisolithus tinctorius and mine spoil on the growth of Virginia pine seedlings
… development. A concurrent open-air greenhouse study showed that mine spoil amendments aided seedling growth more than inoculation did. Mycorrhizal infection was not affected by spoil substrate. Recommendations for the production of mycorrhizal container stock were presented.
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The Regeneration Niche in Bottomland Hardwood Forests: Tree and Herbaceous Communities Along Interacting Gradients of Flood and Light in East Texas Floodplains
… such as oaks and hickories. A complementary greenhouse study demonstrated that two oak species exhibited similar responses to the experimental imposition of shading, flooding, and a combination of both. Both species responded to shading by a reduction in dark respiration rate, light …
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Phosphorus Requirement and Chemical Fate in Containerized Nursery Crop Production
… in substrate pore-water. In a fertigation, greenhouse study, calculated lowest P-fertilizer concentration that sustained maximal growth in Hydrangea paniculata ‘Limelight’ (panicle hydrangea) and Rhododendron ‘Karen’ (azalea) was 4.7 and 2.9 mg·L⁻¹ , respectively, and shoot growth Ilex …
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An integrated plant nutrition system (IPNS) for corn and cannabis in the Mid-Atlantic USA
… alone. We initiated this project conducting a greenhouse study and field experiments evaluating the effects of an IPNS on corn. Posteriorly, the positive results in terms of corn biomass increasing, led to another greenhouse study addressing cannabis (Cannabis sativa L.) due its valuable …
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Effects of Reduced Early Post-Sprigging Nitrogen Application on Bermudagrass Sprig Establishment
… N ha-1 wk-1 to 48.8 kg N ha-1 wk-1. A lysimeter study quantified leaching nitrate loss using the same weekly nitrogen rates, however, only six treatments existed. All plots were rated at weeks 4, 8 and 10 for cover, color, and density. A greenhouse study was implemented to evaluate potential …
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Insights in plant ecology from Bromus tectorum invasion in the Great Basin, USA
… from a large scale, multi-year, observational study on the relative influence of biological characteristics, environmental conditions, anthropogenic disturbance, grazing, and fire on B. tectorum invasion. Third, a hypothesis of invasion that states 'species may induce changes in their …
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Analysis of a <i>Pinus Radiata</i> Seed Stock Field in the Native Año Nuevo Stand in California
<p>This study was a part of the international collaborative IMPACT project, which aims to address the potential threat that the pitch canker disease poses to the use of Pinus radiata D. Don in plantations in New Zealand, Australia, and Chile. A field trial of 264 seedstocks was planted adjacent to …
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Environmental Fate of Animal Manure-associated Antibiotics and Seed-coated Pesticide in Soils
… soil when applied as a seed coating using a greenhouse study. Liquid-solid extraction of PLY from soil using (1:6, v/v) ammonium hydroxide/methylene chloride produced good PLY recovery (67-140%). Liquid-chromatography coupled with tandem mass-spectrometry for instrumental analysis provided …
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Pseudomonas spp. Isolated from the Soybean Nodule Interior Promote Soybean Growth upon Field Amendment
… nodule microbiome. Results from a previous greenhouse study show that a novel species of Pseudomonas associates with soybean nodules as a plant-growth promoting rhizobacteria (PGPR). This study observes the soybean growth promoting potential of Pseudomonas spp. in a field setting. …
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Metabolism, nutritional effects, and mutagenesis of crystal violet decolorization by a biofungicide agent Pseudomonas putida strain M-17
… surrounding bacterial growth was observed. A greenhouse study demonstrated that strain M-17 provided protection against fungal disease as shown by plant stands on cotton (67% stand) equivalent to the commercial fungicides (70% stand) and significantly improved over the unamended control (38% …
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Shade, Moisture, and Woody Vegetation in Stormwater Management Basins: Influence on Cattail (Typha spp.) Growth
… making conditions unsuitable for cattails. In a greenhouse study we tested the impact of three shade (heavy, medium, full sun) and soil moisture (dry, moist, flooded) treatments on cattail growth. After two months, cattail biomass indicated a strong interaction between soil moisture and shade …
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Benefits of Dung Beetles (Coleoptera: Scarabaeidae) on Nutrient Cycling and Forage Growth in Alpaca Pastures
… but not for alpacas. The objectives of this study were to document the dung beetle species present in alpaca pastures, and to evaluate the impact of dung beetle activity on the growth of a common summer annual grass. In 2010 and 2011, dung beetle species present in alpaca pastures located at …
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Pseudomonas spp. Isolated from Soybean Nodules Promote Soybean Growth and Nitrogen Fixation
… role in the nodule is not well understood. This study was conducted to determine the effect of three non-nitrogen-fixing Pseudomonas spp. strains isolated from nodules on soybean, and we hypothesized these strains benefit soybean. A greenhouse study in which two cultivars of soybean (Asgrow …
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Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.)
… 1) A four-month full additive series in the greenhouse and 2) spatial point pattern analysis of trees in a silvicultural experiment were used to analyze the intraspecific and interspecific interference between these two species. In the greenhouse experiment, total biomass responses per plant …
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