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 93 for “"crop species"”.
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MODIFYING PHYLLOTAXIS IN BRASSICA SEED CROP SPECIES FOR YIELD IMPROVEMENT
In un mondo in continua crescita è cruciale aumentare le rese agricole per garantire un adeguato accesso al cibo a tutta la popolazione mondiale, minimizzando l’impatto ambientale. La resa di una pianta è influenzata da molti fattori, tra cui l’architettura dell’infiorescenza e la sua …
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Simulating the Impacts of Land-Use Land-Cover Changes on Cropland Carbon Fluxes in the Midwest of the United States
<p>Understanding the major drivers of the cropland carbon fluxes is important for carbon management and greenhouse gas mitigation in agriculture. Past studies found that agricultural land-use and land-cover (LULC) changes, such as changes in cropland production technologies, tillage practices, and …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
<p>Including cover crops in agricultural production systems is an important management practice. Cover cropping can improve soil health, increase plant-available nitrogen (N), provide surface residue to prevent erosional soil loss, increase water infiltration, and increase weed suppression. Cover …
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The genetic control of stem mechanical properties in Brassica Napus and Wheat
… control of stem mechanical strength in important crop species, has potential for the improvement of lodging resistance. This may be particularly important given the recent interest in the exploitation of crop residues as feedstock for lignocellulosic ethanol production, where the manipulation of …
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Do benefits from cover crops vary by species or mixture composition?
"Cover crops are often used to manage weeds and increase productivity on organic farms, but questions remain about which species or combinations of species have the strongest impacts as living cover and which species and combinations are financially feasible for adoption in organic systems. An …
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The role of cover crops in agroecosystem functioning
Current interest in cover cropping is focused on enhancing ecosystem services beyond soil conservation. Cover crop (CC) species function uniquely in their effects on ecosystem services when grown in monoculture or mixtures. This research integrated field experiments and a literature synthesis to …
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Bee Abundance Along a Tropical Montane Elevational Gradient and Implications for Crop Pollination Services
… and thermal specialization for tropical bee species to understand how these important pollinators may respond to warming temperatures. My four-year study (2016-2019) aims to quantify bee abundance differences across an elevational gradient. I focus on the two bee tribes comprising the most …
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Forward screening for herbicide resistance in Arabidopsis thaliana and the monocot species Triticum aestivum
… and cell wall saccharification. In a larger crop species, these characteristics would allow for plant cell wall material to be efficiently converted into cellulosic ethanol. Therefore, a forward genetic screen has been carried out in Triticum aestivum, bread wheat. Three CBI resistant mutants …
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Contribution of crop morphological characteristics and density of selected crops to weed species composition and suppression
… growing season to investigate the effect of crop species and sowing density on weed dynamics, productivity and species composition. Crops with a spreading (narrow-leafed lupin, Lupimus augustifolius and dwarf French bean, Phaseolus vulgaris), rosette (turnip, Brassica campestris and forage …
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Chloroplast Biotechnology in Higher Plants: Expressing Antimicrobial Genes in the Plastid Genome
While genetic improvement of susceptible crop species may enhance resistance to microbial pathogens and facilitate reduced pesticide load, the possibility for transmission of novel genes to wild relatives has hampered acceptance of GM crops in some markets. Chloroplast transformation presents an …
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Can annual floral strips create effective pollinator habitat in Southern Ontario agricultural landscapes?
… to native flowering plants and commodity crops. Studies indicate a decline in the abundance and diversity of flower visitors worldwide. Recently, Ontario developed a Pollinator Health Action Plan with the mandate of restoring, enhancing, and protecting one-million acres of pollinator …
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The role of auxin and ethylene in adventitious root formation in Arabidopsis and tomato
… for clonal propagation of commercially important crop species, few studies have explored the mechanisms driving the development of these roots. This thesis research explored the hormonal controls and molecular mechanisms of adventitious root formation in Arabidopsis thaliana (Arabidopsis) and …
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Markerfreie transplastome Tabakpflanzen
… genes are maternally inherited in most important crop species. However, the complete removal of antibiotic resistance genes from transplastomic plants is preferable for improved safety standards. In this work a new system was established for the production of marker-free chloroplast transformants …
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Are Barley Dwarfing Genes Important in Tolerance to Abiotic Stress?
… to confer resistance to salt stress in the model species Arabidopsis. In order to determine whether these findings could be translated from Arabidopsis to monocot crop species, GoF and loss of function (LoF) mutants of the barley DELLA orthologue, Sln1, were characterised and growth and …
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Earth observation technologies for improved agricultural decision support systems in South Africa
… practices in South Africa, focusing on crop monitoring, water use efficiency, and land management. Firstly, a systematic review of remote sensing applications in Southern African agriculture, evaluating key advancements, challenges, and opportunities was conducted to document the key …
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Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
… Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis</bold> Jenny L. Knoth Chair of the Supervisory Committee: Associate Professor, Dr. Sharon L. Doty School of Environmental and Forest …
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Value of Cover Crops in Suppressing Weeds and Protecting Cotton Yields and Likelihood of Residual Herbicide Carryover to Cover Crops
… to investigate the potential for using cover crops to suppress problematic weeds in cotton as well as chemical options for cover crop dessication, and sensitivity of cover crops to residual herbicides were evaluated. No differences were observed for cereal rye biomass production and …
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