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.
Results
Showing 1 to 12 of 12 for “"Growing Degree Days (GDD)"”.
-
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 …
-
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 …
-
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 …
-
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 …
-
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 …
-
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. …
-
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, …
-
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 …
-
Exploring the mechanisms of Palmer amaranth resistance to protoporphyrinogen oxidase-inhibitor herbicides, dynamics of gender, and management strategies
… female seedlings reached 90% emergence with 144 growing degree days (GDD) and males with 150 GDD in KS-1, and in MS-1 females reached 90% emergence with 160 GDD, whereas males needed 190 GDD. However, that pattern was not observed in KS-2, and as the GDD window of difference between female and …
-
Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… crops growth can be predicted using thermal days or growing degree days [GDD] similar to commodity crops such as corn (Zea mays L.) or rice (Oryza sativa). Growing degree day calculations are a well-known tool to predict crop growth stage or development stage and can be adapted for use in any …
-
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 …
-
Retrieval of grassland biophysical parameters using multitemporal optical and radar satellite data
… weather station was also used to calculate the Growing Degree Days (GDD) for Grange to determine the impact of ancillary data on biomass estimation. In situ and satellite data covering 12 years for the Moorepark and 6 years for the Grange study sites were used to predict grassland biomass using …