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 22 for “"Climate and soil"”.
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Environmental and Climatic Constraints on Large-scale Camelina Production in Eastern Arkansas
… sometimes during the winter. Research analyzing climate data and soil hydrology is important to better understand the environmental and terrain conditions necessary for Camelina farming wherever it is proposed for large-scale production. This study focused on various conditions and constraints …
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Vegetation gradients in Southern Cape mountains
… little studied in the past so that management and planners have had to draw heavily on Western Cape experience. This study arose from the need to define local vegetation patterns and their interdependence with animal life, climate and soil as a necessary prerequisite to vegetation mapping and …
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Long-term effects of fire on nitrogen cycling in a broad-leaf savanna, Kruger National Park, South Africa
Fire with herbivory, climate, and soil properties including nutrients are said to be important in regulating the structure and function of savanna ecosystems. Frequent fire is often held responsible for a decrease in nitrogen pools and availability and the maintenance of low fertility conditions. …
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Cotton Injury Due to Soil- or Foliar-Applied Herbicides: An Assessment Based on the Influences of Genetic, Agronomic, and Environmental Factors
… this means the utilization of older chemistries and residual herbicides. The goal of this research was to evaluate and understand the agronomic and environmental factors that affect the inconsistent injury often associated with these herbicides as well as determine the impact of Palmer amaranth …
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Regenerative agriculture and soil carbon storage in the Upper Corn Belt
Land use conversion, agricultural mismanagement, and topsoil erosion have depleted global soil organic carbon (SOC) stocks in the top two meters of soil by an estimated 133 petagrams (Pg), resulting in a significant SOC debt. Regenerative cropping practices, such as no-till and cover cropping, are …
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Modeling of N2O emission from unmanaged terrestrial ecosystem soils
… gas, but also impacts stratospheric ozone. Soils under natural vegetation and agriculture are the major sources of N2O through nitrification and denitrification processes. Current estimates of N2O emissions on regional to global scales are largely based on the upscaling of limited …
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The role of rooting strategies on the eco-hydrology of semi-arid regions
… by high variability in the arrival of rainfall, and species found in these areas have adapted mechanisms to ensure the capture of this scarce resource. In particular, the rooting strategies employed by vegetation can be critical to their survival. However, land surface models currently prescribe …
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KGML-N: a knowledge guided machine learning modeling framework for efficient simulation of N-yield response
… balancing crop yield against fertilizer costs and environmental risks. While scientific tools exist to guide these decisions, they face a trade-off. Complex process-based (PB) models are detailed but inefficient for large-scale use, while simpler data-driven models are fast but often unreliable …
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An examination of geographic patterns of soil climate and its classification in the U.S. system of soil taxonomy
<p>Soil climate, the record of temporal patterns of soil moisture and temperature, is an important component of the structure of U.S. Soil Taxonomy. The U.S. Soil Survey has used the Newhall Simulation Model (NSM) for estimating soil climate from atmospheric climate records at weather stations …
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Development of testing protocols and evaluation methods for erosion and sediment control products
A study at the Erosion and Sediment Control Research and Training Center (ESCRTC) at the University of Illinois at Urbana-Champaign was conducted to develop testing protocols for ditch checks and erosion control blankets, as well as evaluate the products’ effectiveness as erosion and sediment …
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Incorporating Climate Sensitivity for Eastern United States Tree Species into the Forest Vegetation Simulator
Detecting climate-induced effects in forest ecosystems become increasingly important as more evidence of greenhouse-gas-related climate change were founded. The Forest Vegetation Simulator (FVS) is an important growth and yield model used to support management and planning on public forest lands …
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Influencia del tipo de suelo en el estado nutricional de la vid, el desarrollo vegetativo, la producción, la composición de la uva y de los vinos de la variedad Tempranillo tinto (Vitis vinífera L.) en el ámbito de la D.O.Ca Rioja
The influence of soil types and climate on the development of the vineyard and on the quality of the grapes and wine is little studied in the world, Spanish vineyard and, consequently, in the D.O.Ca. Rioja. Therefore, the objective of this work was to study simultaneously the factors: soil type and …
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Effect of sinkholes on soil moisture and ground water recharge at an abandoned underground coal mine near Wilton, North Dakota
<p>Subsidence at abandoned underground mines in south-central and southwest North Dakota has produced numerous sinkholes. Previous studies in the Northern Great Plains have suggested depression-focused recharge may be a significant ground water recharge mechanism in this region. Thus, sinkholes may …
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Water Fluxes in Soil-Pavement Systems: Integrating Trees, Soils and Infrastructure
In urban areas, trees are often planted in bare soil sidewalk openings (tree pits) which recently are being covered with permeable pavements. Pavements are known to alter soil moisture and temperature, and may have implications for tree growth, root development and depth, drought resilience, and …
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Rainfall trends in India and their impact on soil erosion and land management
… to determine the impact that future changes in climate may have on the environment and to what extent any adverse effects can be mitigated. In this research an assessment was carried out on the impact that climate trends may have on soil erosion and contaminant transport in India and examined …
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The mathematical modeling and analysis of nonlocal ecological invasions and savanna population dynamics
… focus of this dissertation is the development and analysis of two new mathematical models that individually address major open problems in ecology. The first challenge is to characterize and model the processes that result in a savanna ecosystem as a stable state between grassland and forest, …
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Vegetation and microbial determinants of soil carbon isotopic composition
Typically, soil δ¹³C and δ¹⁵N values tend to increase with depth across a wide range of ecosystems. Changes in δ¹³C with depth have been attributed to vegetation changes (i.e. C₃/C₄ shifts), but the similarity in δ¹³C and δ¹⁵N profiles suggest that microbial decomposition may play an important …
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'Hass' avocado tree water use and the effects of water stress on fruit development
‘Hass’ avocado tree water use and the effects of water deficits on fruit development were assessed in New Zealand from 2017 to 2019. Avocado tree water use was quantified by sap flow measurement and the soil water balance method at three sites in the main avocado growing regions of the Bay of …
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Modeling Mortality of Loblolly Pine Plantations
… is an important component of forest growth and yield prediction systems, yet mortality remains one of the least understood components of the system. Whole-stand and individual-tree mortality models were developed for loblolly pine plantations throughout its geographic range in the United …
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EVALUATION OF LAND, SOIL, WATER, AND VEGETATION-RELATED ECOSYSTEM SERVICES AND TRADEOFFS AT UTILITY-SCALE SOLAR PHOTOVOLTAIC FACILITIES
… PV may displace natural or agricultural land and compromise the land’s ability to provide ecosystem services. Co-locating solar photovoltaics with vegetation (sometimes referred to as “agrivoltaics”) could provide a sustainable solution to meet growing food and energy demands while …
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