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 659 for “"growing season"”.
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Deer Preference for Corn Hybrids and Husbandry Practices During the Growing Season
… virginianus) for corn hybrids during the growing season and how preference might affect depredation patterns. I used captive adult female white-tailed deer (n = 4) in corn food plots to study the effect of herbicide treatments on deer use (treatment vs. no treatment) of corn in 2005, and …
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Vegetation growing season length along the urban-rural gradients across European capital cities
Ilmastonmuutoksen ja kaupungistumisen myötä urbaanin kasvillisuuden merkitys ilmaston, ekologian ja ihmisen hyvinvoinnin näkökulmasta on korostunut. Kasvillisuuden fenologia säätelee merkittävästi ekosysteemipalveluiden toimintaa, ja kaupunkikasvillisuuden fenologiaan vaikuttavat esimerkiksi …
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The effect of timing of growing season drought on flowering of Andropogon gerardii
… (e.g. carbon gain via rapid growth early in the growing season vs. direct effects on stalk elongation later in the growing season). In order to test the differential effects of precipitation timing, rainfall deficits (100% exclusion) at different periods of the growing season were imposed on …
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Food Supply Early in the Plant Growing Season: Influences from Elk Abundance and Precipitation
… and herbivore populations. Early in the plant growing season, many plants put most of their energy goes towards above ground growth, and herbivore disturbances can accelerate this growth given adequate soil moisture. The relationship between these factors can also vary spatially as conditions …
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Non-growing season CO2 fluxes of a boreal fen – key drivers and responses to anomalous winter conditions
Non-growing season carbon fluxes can contribute to a significant amount of the full-year ecosystem carbon balance. Year-round net ecosystem exchange (NEE) data from 17 years was used to analyse the non-growing season carbon dioxide (CO2) fluxes together with environmental and meteorological …
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The timing of growing season drought and its effects on above- and belowground production in a mesic grassland
… dry are expected to get drier and the timing of seasonal drought - defined as a prolonged absence or marked deficiency of precipitation - is expected to change. Although drought in general has been extensively studied, particularly in grasslands, we know little about how natural ecosystems will …
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Effects of Altered Growing Season Precipitation and Management History on Aboveground Biomass Production in Tallgrass and Mixed Grass Prairie of South Dakota
… prairies effects vegetative production for cool season and warm season plants. Ranchers and farmers livelihoods are dependent on adequate annual precipitation and vegetation for cattle production. Historically, in South Dakota drought has occurred in northern mixed grass prairie one out of five …
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An investigation of the impacts of intra-seasonal rainfall variability on the maize growing season in Limpopo Province, South Africa from 1990-2014
… is an essential requirement for successful maize growing seasons. The variability of intra-seasonal rainfall characteristics such as onset, cessation and wet and dry spells threatens maize yields in Southern Africa. Previous studies have focused on the impacts of seasonal rainfall totals on maize …
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Stable carbon and oxygen isotope investigation of Pleistocene growing-season paleoclimate using tree-ring cellulose from the Missinaibi Formation, Adam Creek, James Bay Lowland, Canada
… of cellulose in tree rings provide a record of seasonal and annual climatic conditions such as precipitation and temperature. We analyzed stable isotopes of carbon (δ13Ccellulose) and oxygen (δ18Ocellulose) in early-wood and late-wood of five conifer sub-fossil wood samples from the Missinaibi …
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Nitrogen uptake patterns by snow addition in a sub-Arctic dry heath tundra ecosystem
… affectssnow accumulation and the length of the growing season. In this study, I examined the influence of snow depth on parameters such as water content, soil temperature, microbial activity, and nutrient availability and investigated their implications for plant water availability and nitrogen …
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Seasonal Changes in Biomass of Two ComFreshwater Wetland plants: storage of nutrients
… be greater in belowground biomass in the non-growing season compared to the growing. I also hypothesized that the storage of phosphorous would be greater in aboveground biomass in the growing season compared to the non-growing season. Furthermore, I hypothesized that the total amount of …
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Regrowth of Festuca hallii (Vasey Piper) and Stipa curtiseta [(A.S. Hitch.) Barkworth] following defoliation on a hummocky landscape in Central Saskatchewan
… Mowing reduced GSC of F. hallii for 1 to 11 growing season months and DSC for 1 to >11 growing season months. Mowing in May or November reduced ANPP of F. hallii for 1 growing season, while mowing in other months reduced ANPP for 2 growing seasons. Green standing crop of S. curtiseta, ranging …
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Estimating and Modeling Transpiration of a Mountain Meadow Encroached by Conifers Using Sap Flow Measurements
… has the primary goal of recovering sufficient growing season soil moisture necessary for endemic, herbaceous meadow vegetation. Therefore, conifer water use represents an important hydrologic output toward evaluating the efficacy of this active management approach. This study quantified and …
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Senescence of Native Perennial Warm Season Grasses Senescence Associated Switchgrass Transcriptome
… early senescencing crops do not maximize the growing season as nutrient reallocation takes precedence. Chlorophyll degradation and nitrogen reallocation was observed to occur rapidly between mid to late September. Transcriptome analysis on early and late senescencing switchgrass cultivars …
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A comparison of canopy evapotranspiration for maize and two perennial grasses identified as potential bioenergy crops
… on the hydrologic cycle. We predicted that total seasonal evapotranspiration (ET) would be higher for PRGs relative to maize resulting from higher leaf area and a prolonged growing season. We further predicted that, compared with maize, higher above-ground biomass associated with PRGs would offset …
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The effect of weather on critic ratings and auction prices for Stellenbosch Bordeaux blends from 2001-2021.
Growing season conditions are crucial in determining the quality of grapes in a vineyard. Identifying the climate variables with the greatest effect is therefore of interest to viticulturists and winemakers. Continued warming is evident for Stellenbosch since 2001, especially the last ten years. …
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Hydric soil properties as influenced by land-use in Southeast Virginia wet flats
The accuracy of 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 …
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Historical fire regimes in southeasern pine savannas
… the range of variation in frequency and seasonal timing of past fire regimes and the relative importance of anthropogenic and lightning-ignited fires. Characterization of past fire regimes is needed for effective restoration and management of these high-biodiversity ecosystems. I used …
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