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 36 for “"Growing Degree Days"”.
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Implications of climate change on energy demand and growing-degree days
… along with the length and productivity of the growing season. Metrics for energy demand and for agriculture and ecosystems are expected to continue to respond to the changing climate throughout the 21st century. The metrics most commonly used for energy demand are heating-degree days and …
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Potential environmental factors associated with the newly emerging bat white-nose syndrome in the northeastern United States: an exploratory modeling approach and case-control study
… predictor variables revealed Slope, Growing-Degree Days, Annual Temperature Range, and Land-Cover as the top four predicting variables for WNS infected bat hibernacula locations. Similarly, the case-control study showed that two of these top four predictor variables (Growing-Degree …
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New Methodologies to Generate, Conserve, and Predict, Renewable Energy Output for Season Extension of Warm and Cool Season Vegetable Crops
… for air, soil, and tube temperature (ºC), crop growing degree - days, squash seed germination and kale height (cm) and dry biomass (g). The electrically heated water tube produced the highest mean spring day air (28.2 ºC), fall soil temperatures (14.6ºC), thermal tube temperature for the 24 - …
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Climate Variability Influences Women’s Attitudes Towards Intimate Partner Violence (IPV)
… a linear probability model, we find prior year growing degree days (GDD), prior and current year rainfall variability have statistically significant effects. Most interestingly, we find that a one standard deviation (SD) rise in prior year annual rainfall decreases the likelihood of justifying …
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Water use of mature pecan orchards under semi-arid conditions
… of America (U.S.A), due mainly to a longer growing season in the Northern Cape. The current data used for water management of pecan orchards are primarily based on research done in other countries or by using an empirical model to estimate water use. As different regions are characterized by …
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Quantifying How High Tunnels Create a Microclimate For Improved Crop Growth
… The HT microclimate varied by season, with more growing degree days inside the HT than outside in the spring, fall and winter. The way farmers managed HTs using manual ventilation, shade cloth and fans was the strongest determinant of how the climate inside the HT was different from outside. HTs …
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A Comparison of Corn Yield Forecasting Models
… model is developed by adding accumulated growing degree days (GDD) and accumulated rainfall variables. The competing subjective model is developed by adding a USDA crop conditions index (CCI) variable. The models are estimated weekly between weeks 24 and 36 of the calendar year. The three …
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A Comparison of Corn Yield Forecasting Models
… model is developed by adding accumulated growing degree days (GDD) and accumulated rainfall variables. The competing subjective model is developed by adding a USDA crop conditions index (CCI) variable. The models are estimated weekly between weeks 24 and 36 of the calendar year. The three …
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The Influence of Chilling and Heat Accumulation on Bloom Timing, Bloom Length and Crop Yield in Almonds (Prunus dulcis (Mill.))
… of 90% bloom from 1996-2006, bloom length in days and final crop yields in pounds per tree for Nonpareil and Mission varieties. Data were collected from the University of California Cooperative Extension reports on the 1993-2006 Regional Almond Variety Trials in Butte, San Joaquin and Kern …
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Application de la télédétection à l'analyse de la variabilité climatique des régions boréales et subarctiques du Canada et à la validation du modèle régional canadien du climat
… robustness.The latter parameters (length of the growing season, annual growing degree-days, and ecotone displacement) were selected so as to minimize problems related to instrumental drift and inter-satellite adjustment.The study of the twenty year NOAA-AVHRR satellite archives, permitted the …
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Reconstructing NDVI Time Series from Landsat and MODIS and Developing a Species-Specific Validation Dataset for Vegetation Classification in Frontenac Provincial Park
… independently to identify SOS DOY trends. Growing degree days (GDD) increased significantly (slope = 2.78; p = 0.009) from 1972-2023, reflecting regional warming. However, SOS DOY showed no statistically significant shifts in either dataset. For MODIS, other seasonal metrics—including end …
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Evaluation of novel techniques to establish and transition overseeded grasses on bermudagrass sports turf
… required 218, 139, and 327 cumulative growing degree days at base 18.3 C (GDD) to reach 95% cover. Bermudagrass biomass was also positively correlated with increasing duration of noncompetitive GDD. Total nonstructural carbohydrates were not correlated to duration of PR competition. …
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Long-term dynamics of forest phenology across the central hardwoods
… found between phenological shifts and cumulative growing degree days, April temperatures, and topographic variability. Phenology in the central hardwoods is changing in complex, spatially distinct ways in response to climate variability and local landscape context. Altered phenological timing may …
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Essays on the Economics of Climate Change, Water, and Agriculture
… farmers adapt to changing climate conditions by growing more profitable crop mixes when presented with more growing degree-days (GDD), precipitation and groundwater access. Chapter 4 presents a behavioral perspective, in which I test how producers' expectation formation processes lead to short …
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Impacts of Driving Factors on Annual Cicada Emergence in Relation to the Seasonal Abundance of Eastern Copperheads (Agkistrodon contortrix)
… precipitation, moon phase, photoperiod, and growing-degree days) in connection with the timing of copperhead movement and cicada emergence. Nightly visual encounter surveys were conducted to determine copperhead and cicada relative abundances while observing behavioral interactions. Climatic …
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Multi-Scale Analysis of Climate Change: Case Study of Major Canadian Wine Areas
… the number of heat (GS-HD), frost (GS-FD), and growing degree days (GDD). Under the business-as-usual scenario (GHG emissions, RCP 8.5) from 2020 to 2100, the Niagara Region, Annapolis Valley, and Okanagan Valley will likely experience increases in GS-HD of 30, 23, and 55, respectively. …
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Local impacts of global change: shifting range limits, advancing phenology, and communicating research
… climate (primarily snow disappearance date and growing degree days, and a lesser degree soil moisture draw-down) but that they advance non-uniformly which causes phenological community reassembly in climate change-like conditions. This reassembly causes plants to co-flower in novel ways, and has …
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Crop loss in two spring oat cultivars due to Puccinia coronata f.sp. avenae and barley yellow dwarf virus, and a spring oat plant growth model
… 1990. Minimum and maximum daily temperatures, growing degree days (GDD), leaf area and several yield components were determined. Leaf area was evaluated as an empirical parameter for predicting potential oat yields. Leaf area had no predictable relationship to yield, test weight, …
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GEOGRAPHIC EFFECTS OF CLIMATE CHANGE ON MAJOR RURAL LAND COVERS OF THE CENTRAL UNITED STATES
… As the climate begins to shift towards longer growing seasons, more erratic rainfall patterns, and overall warmer temperatures, there is potential for major impacts on seven major land covers of the central U.S. Suitability landscapes of individual land covers (corn, soybeans, spring and winter …
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Phenology, impact, and rearing of Lycorma delicatula (White) (Spotted Lanternfly) in Virginia
… years. I also calculated cumulative average growing degree days for each life stage event using a lower developmental threshold of 10°C. Additionally, I confirmed that the host range of L. delicatula narrows as they progress through development. These results will help growers and land …
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