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 185 for “"soil temperature"”.
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The effect of mulch on soil temperature, soil moisture, and evaporation
Conclusions: the absorption hygrometer cannot be used satisfactorily to measure differences in evaporation from small plots.
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Improving the usability of soil temperature information to support agricultural decision making
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Effects of soil temperature on Sphagnum moss litter quality and decomposition in a subarctic environment
… peatlands play a significant role in global soil carbon budgets, attributed to the slow decomposition rate of Sphagnum mosses that facilitates carbon sequestration through the build-up of peat. As climate change is predicted to increase soil temperatures and decomposition rates of organic …
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Pearl millet (Pennisetum americanum (L.) Leeke) emergence, yield and yield component response to seed quality and soil temperature
Call number: LD2668 .T4 1985 M62
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Pearl millet (Pennisetum americanum (L.) Leeke) emergence, yield and yield component response to seed quality and soil temperature
Call number: LD2668 .T4 1985 M62
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Bulk deposition of pesticide mixtures in a Canadian prairie city and the influence of soil temperature fluctuations on 17β-estradiol mineralization
… 2,4-D and 17β-estradiol using a novel in-field soil microcosm study and a series of laboratory experiments under different temperature incubations. Results indicated that temperature fluctuations do not greatly affect the amount or rate of mineralization relative to the traditionally constant …
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Pathogenicity of sclerotia-forming isolates of Colletotrichum truncatum to soybeans (Glycine max) and the effect of soil temperature on root infection
… yield were examined in the field. The effect of soil temperature on root infection by the sclerotia-forming isolates was studied in soil temperature tanks at the University of Illinois at Urbana-Champaign (UIUC).
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Root-zone soil temperature: sources of variation and some effects on planted conifer seedlings in high-elevation forest openings in the interior of British Columbia
… rooting of planted stock, partly because of low soil temperatures, has been suggested as a major cause for failure of reforestation efforts in these harsh environments. The first objective of this study was to record the variation in root-zone soil temperature occurring in high-elevation openings …
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Reproduction of a root-knot nematode population on flue-cured tobacco homozygous for Rk1 and/or Rk2 resistance genes and the effect of soil temperature on resistance gene efficacy
… 3 compared to either gene alone, and if high soil temperatures impact their efficacy. Root galling, numbers of egg masses and eggs, and the reproductive index were compared from roots of Coker 371-Gold (susceptible), NC 95 and SC 72 (Rk1Rk1), T-15-1-1 (Rk2Rk2), and STNCB-2-28 and NOD 8 (Rk1Rk1 …
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Non-growing season CO2 fluxes of a boreal fen – key drivers and responses to anomalous winter conditions
… respiration, and thus were likely driven by soil temperature. The relative importance of air and soil temperature, vapor pressure deficit, water table depth, and photosynthetically active radiation (PAR) on NEE of CO2 was analyzed with a random forest algorithm. PAR and soil temperature were …
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Modeling pre-harvest aflatoxin incidence in groundnut (arachis hypogaea l.) using selected soil properties and ambient temperature
… during crop growth is associated with adverse soil factors and weather conditions. Therefore, good agricultural practices are an important strategy to minimize the pre-harvest aflatoxin contamination risk in groundnut. The main objective of this study was to formulate regression models to …
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Modeling pre-harvest aflatoxin incidence in groundnut (arachis hypogaea l.) using selected soil properties and ambient temperature
… during crop growth is associated with adverse soil factors and weather conditions. Therefore, good agricultural practices are an important strategy to minimize the pre-harvest aflatoxin contamination risk in groundnut. The main objective of this study was to formulate regression models to …
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Hydric soil properties as influenced by land-use in Southeast Virginia wet flats
… the growing season used by regulators in hydric soil and wetland hydrology and the validity of ignoring land use in these definitions is questionable. This study compared measured air and soil temperature with various growing season dates and indicators, and determined the relationships between …
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In situ carbon dioxide flux from Arctic tundra during freeze- up
The relationship between soil temperature and CO₂ flux from undisturbed soil cores was examined during freeze-up of arctic tundra. Three habitats which dominate tundra topography, polygon trough, ridge and basin, produced significantly different amounts of CO₂ when soil temperatures were above 0 C. …
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Effects of Fire on Soil CO₂ Efflux in a Mature Longleaf Pine Forest
… Center located Lamar County, MS. Measurements of soil CO₂ efflux (i.e., soil respiration or SR) rates (µmol m<sup>-2 </sup>sec<sup>-1</sup>) were taken across 8 field plots (4 burned, 4 unburned) before and after a prescribed fire on that occurred in May, 2012. These measurements were taken over …
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Soil Respiration of Native Saskatchewan Grassland Calculated from Carbon Dioxide Concentration Profiles
A study was conducted to monitor soil respiration by measuring CO2 concentrations in soil throughout the growing season. The technique of gas chromatography was used to obtain CO2 concentration profiles on native grassland and cultivated soils. The CO2 concentration gradients were then used to …
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Surface conditions effect on energy exchange at the soil surface
… were conducted to determine the effect of soil surface properties on physical processes occurring at or near the soil surface. Study one examined tillage effects on soil thermal properties and heat flux. Study two examined surface roughness effects on soil reflectance, net radiation, and …
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Spatial and Temporal Trends in Greenhouse Gas Fluxes from a Temperate Floodplain along a Stream-Riparian-Upland Gradient
… in response to primary controls including soil moisture, soil temperature, and available nutrients. In this study, we performed a semimonthly sampling campaign measuring GHG (CO2, CH4, and N2O) fluxes from six locations within a third-order stream floodplain. Site locations were based on …
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Evaluation of Mob Grazing and its Impacts on Soil Moisture and Temperature and Litter Decomposition in South Dakota
… through increased trampling, which “feeds the soil bugs”. In order to quantify the effects this trampled vegetation has on ecosystem processes, we observed litter decomposition, soil moisture, and soil temperature in mob grazed areas compared to the extremes of the spectrum: Ungrazed and Bare …
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Soil Carbon Dioxide Efflux in Response to Fertilization and Mulching Treatments in a Two-Year-Old Loblolly Pine (Pinus taeda L.) Plantation in the Virginia Piedmont
… dynamics of intensely managed forest ecosystems. Soil carbon dioxide efflux resulting from soil microbial activity and root respiration is one of the major components of the total carbon flux in forested ecosystems. In an effort to examine the response of soil carbon dioxide efflux to changes in …
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