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 101 for “"crop productivity"”.
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Modeling the effects of environmental and management variables on crop productivity
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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An autonomous decision support system for smart farming to increase crop productivity
… system for smart agriculture to increase crop productivity by implementing Industry 4.0 technologies in the agricultural sector. The study uses a quantitative technique. A comprehensive literature review establishes the theoretical framework, followed by the design and development of a …
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Mapping agroecosystem management practices from space and quantifying their impacts on crop productivity
… increasing rapidly, making it crucial to sustain crop productivity under climate change. Agriculture in the United States, one of the most productive regions in the world, faces challenges to be economically, socially, and environmentally sustainable. Effective agricultural management is essential …
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Evaluation of Soybean Maturity Group and Planting Date in a Soybean-Rice Rotation on Overall Crop Productivity
… impact on the subsequent rice (Oryza sativa L.) crop’s success. This study was conducted to determine how soybean maturity group (MG) and planting date effect overall soybean productivity and its influence on the following rice crop. Various soybean planting dates (optimum and late) and MGs (3.5, …
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Remote sensing of croplands, crop productivity, and water use efficiency with a focus on smallholder systems in southern Africa
… of remote monitoring methods for broadacre crops. Ongoing deployment of new satellite missions means researchers have an increasing volume of data from which information on crop production can be derived. However, more accurate mapping of croplands, estimation of crop productivity, and …
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Remote sensing of croplands, crop productivity, and water use efficiency with a focus on smallholder systems in southern Africa
… of remote monitoring methods for broadacre crops. Ongoing deployment of new satellite missions means researchers have an increasing volume of data from which information on crop production can be derived. However, more accurate mapping of croplands, estimation of crop productivity, and …
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A dynamic analysis of the crop productivity impacts of soil erosion: an application to the Piedmont area of Virginia
… non-point source pollution, and aggravates the crop productivity impacts of soil erosion, can be accomplished by adopting alternative support practices. Because of the change in support practices, reductions in the present value of net returns are expected, but this decrease in return was found …
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Assessing the impact of climate change on crop productivity of subsistence farmers in Namibia: A case study of the Omusati region
… to investigate the impact of climate change on crop production for subsistence farmers in the Omusati region. The study was based on quantitative methodological approaches. Data was collected through questionnaires with structured questions that were administered to 100 house head farmers, …
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Quantifying plant physiological responses to drought and high-temperature stress in the Midwest U.S.: Through scaling from proximal hyperspectral sensing to satellite monitoring
… in the world and quantifying and predicting its crop productivity is critical to achieve and maintain global food security. To quantify crop productivity reliably, understanding crop responses to climate variability is a prerequisite, but our current knowledge and capability are limited …
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Is sustainable intensification possible in smallholder crop production systems in semi-arid West Africa? The case of the Red Volta and Black Volta basins in Northern Ghana
… and biophysical challenges. In Ghana, crop production varies across semi-arid systems, particularly between the Red Volta and Black Volta basins. Given this context, the study assessed and compared the factors contributing to crop productivity differences between and within the RVB and …
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Characterization of Coleus x hybridus Voss. 'Goldbound' water requirements
… deficit is the major factor limiting global crop productivity. Yield loss caused by water stress is estimated to exceed total loss from all other causes. Moreover, availability of agricultural water is declining worldwide because of increasing demand and decreasing quality. Consequently, …
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Effects of Biochar Application on Soil Fertility and Pearl Millet (Pennisetum glaucum L.) Yield
… sequestration and to enhance soil fertility and crop productivity. The objective of this study was to evaluate the effects of a single biochar application from peanut shell (Arachis hypogea L.) and mixed pine (Pinus spp.) wood to a Typic Hapludults in Blacksburg (VA, USA) and from peanut shell …
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Investigating temperature signalling pathways in Arabidopsis thaliana using small molecules
… low seasonal temperatures have large impacts on crop productivity and are expected to intensify given current global climatic projections. It is therefore of agricultural importance to better understand temperature signalling pathways in plants in order to find solutions to this problem. In this …
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Food security and erractic weather coping strategies of small scale farmers in rural Kitwe-Zambia
… study is to analyse the influence of rainfall on crop productivity and the strategies they employ to reduced the impact of erratic climate, rainfall in particular. In additions, the aim is to investigate the strategies the farmers employ to ensure that they have access to food year round. In order …
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Characterising cyanobacterial and algal bicarbonate transporters using heterologous systems; exploring relationships between sequence, structure and function
… cyanobacteria accounting for up to 25% of this productivity. A major factor underlying this is their carbon dioxide concentrating mechanisms (CCMs). Bicarbonate (HCO3-) transporters facilitate accumulation of intracellular HCO3- which diffuses into micro-compartments (carboxysomes) where the …
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Characterising cyanobacterial and algal bicarbonate transporters using heterologous systems; exploring relationships between sequence, structure and function
… cyanobacteria accounting for up to 25% of this productivity. A major factor underlying this is their carbon dioxide concentrating mechanisms (CCMs). Bicarbonate (HCO3-) transporters facilitate accumulation of intracellular HCO3- which diffuses into micro-compartments (carboxysomes) where the …
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Assessing the potential of biochar to restore degraded lands
… because of its effects on soil properties, crop productivity, and carbon sequestration. Biochar has been reported to improve soil quality, crop yield, and soil carbon sequestration potential. Despite this, little is known about the effects of biochar on soil physical properties, making it …
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Assessing the potential of biochar to restore degraded lands
… because of its effects on soil properties, crop productivity, and carbon sequestration. Biochar has been reported to improve soil quality, crop yield, and soil carbon sequestration potential. Despite this, little is known about the effects of biochar on soil physical properties, making it …
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High throughput phenotyping and quantitative genetics of leaf functional traits in C4 grasses
… is exacerbated by the need to increase plant productivity to maintain aboveground biomass and crop yield in suboptimal and resource limited environments. Improving crop productivity without increased resource use requires greater in whole plant water and nutrient use efficiencies. To meet …
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Assessment of perennial bioenergy buffers within a row crop production system
… to achieve long-term sustainability (e.g. crop productivity potential) and minimal downstream effects (e.g. externalities such as eutrophication and hypoxia). One approach to addressing these challenges is through the development and implementation of multifunctional landscape designs which …
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