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 21 for “"Seedbank"”.
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Solarization as a means to eliminate invasive plant species and target the seedbank
… From years of invasive species presence a deep seedbank has developed within the soil which acts to reduce the effectiveness of native plant reintroductions. A technique known as "solarization" was used to eliminate the seedbank and to facilitate the survival of native plants. Tarps were used to …
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Linking soil erosion processes with arable weed seedbank dynamics to inform sustainable cropping
… biodiversity. Over the past 50 years, the weed seedbank has been declining due to farming intensification, increased herbicide use and weed suppression through competitive autumn crop planting. However, there is less recognition of the potential of soil erosion affecting the weed seedbank. This …
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The Investigation of the Soil Seedbank in a Long-term Mowing and Fertilization Experiment
Seedbanks, the assemblage of dormant seeds found in soils, play a vital role in plant community dynamics and can aid in environmental restoration efforts. Studies have shown that fire suppression, anthropogenic nutrient addition, and human-altered hydrology can all have negative effects on …
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Relationship between seed dormancy and persistence of seeds of annual ruderal species in the soil seedbank
… seed persistence and dormancy, a five-year seedbank dynamics field study was conducted in Savoy, IL, involving twelve ruderal weed species: Abutilon theophrasti, Alliaria petiolata, Amata tuberculatus, Ambrosia trifida, Chenopodium album, Ipomoea hederacea, Kochia scoparia, Panicum …
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Role of seed mixes, biochar soil amendment, and the soil seed bank in improving Palouse Prairie restoration
… prairie restoration. Additionally, the soil seedbank of the Palouse ecoregion is widely unknown but could provide insight into methods or species to use for restoration. My research aimed to determine the effects of seed mix diversity, annual seed addition, and soil organic matter (as …
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Understanding seed-soil adhesion by myxospermous seeds and their biophysical function in agroecosystems
Seedbanks provide many ecosystem services that support wildlife and regulate soil function. The fate of arable seeds is vital in shaping the aboveground composition of plant communities in agroecosystems. Understanding seed fate informs seedbank dynamics with multi-species interactions, as well as …
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Cover crop management strategies for driver weeds in Kansas
… how cover crops influence weed suppression and seedbanks. As cover crops increase on farm production hectares, management strategies must be evaluated to discover which ones result in optimum weed control. The effects of cereal rye cover crop on Palmer amaranth (Amaranthus palmeri S. Watson) and …
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The Peninsula Shale Renosterveld of Devil's Peak: phytosociology, system drivers and restoration potential
… area; and an examination of the health of the seedbank through a greenhouse experiment to ascertain whether it could prove a useful asset in future restoration initiatives. The results show how historical drivers have created a novel ecosystem with vegetation states ranging from relatively …
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Weed seed destructor: A harvest weed seed control method to manage waterhemp in soybean
… that can be used to limit weed seed inputs into seedbank at the time of crop harvest. Research on the potential of HWSC methods in the U.S. cropping systems is lacking. Objectives of this research were: 1) to quantify waterhemp seed shatter patterns in Iowa soybean production, 2) to quantify …
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Use of Harvest Weed Seed Control Strategies in Arkansas Soybean
… crop harvest. HWSC focuses on lowering the soil seedbank by targeting weed seeds that pass through a combine at harvest. Experiments were conducted at the University of Arkansas in 2014 and 2015 to test the efficacy of HWSC on weeds in a soybean production system. Palmer amaranth, which has been …
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Integration of Herbicide Programs with Cultural and Mechanical Practices for Managing Glyphosate-Resistant Palmer amaranth (Amaranthus palmeri) in Soybean (Glycine max)
… control this weed but also to reduce the soil seedbank using both non-chemical and chemical practices. Studies were conducted to determine the effect of soybean row spacing, seeding rate, and herbicide program on Palmer amaranth emergence, survival, and seed production in soybean, the effect of …
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Establishment, Mortality and Growth of Recruits in an Experimentally Disturbed Piñon-Juniper Woodland
… treatment signs of recruiting from a stable seedbank. By contrast, piñon seedlings emerged in higher numbers but had higher first-year mortality with little buffering from a persistent seedbank. Larger and presumably older saplings were more often found under the cover of heterospecific …
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Fire and non-native grass invasion across a heterogeneous landscape in the Central Hardwoods
… reduced emergence of M. vimineum from the soil seedbank, plots with a history of prescribed fire exhibited higher M. vimineum biomass and recruitment than unburned plots the following growing season. Soil moisture strongly modulated M. vimineum response to fire, such that the positive response …
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Evaluation of Seed Impact Mills for Harvest Weed Seed Control in Soybean and Wheat in the Eastern United States
… preventing seeds from being added to the soil seedbank. Mills like the Redekop Seed Control Unit (SCU) and the integrated Harrington Seed Destructor (iHSD) could be used in soybean and wheat production in the eastern United States. Understanding the effectiveness and limitations of these mills …
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Decision Support Software for Palmer Amaranth Weed Control
… effects of management practices on soil seedbank and economics to encourage the adoption of IPM methods for Palmer amaranth.</p>
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Long-Term (24-Year) Effects of Harvest Disturbances on Ecosystem Productivity and Carbon Sequestration in Tupelo-Cypress Swamps in the Mobile-Tensaw River Delta
… glyphosate herbicide removal of all sprouts and seedbank regeneration for two years following harvest (GLYPH). An adjacent mature stand (94 years old) within the same original composition represented mature forest or pre-harvest reference conditions (REF). Above- and belowground plant biomass, …
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Biological control of the invasive Ailanthus altissima (tree-of-heaven) in Virginia using naturally occurring Verticillium wilt fungi
… herbaceous understory, but not the germinable seedbank. Furthermore, we found that this impact on the woody understory appears to increase over time, supporting early management actions and helping us predict post-management restoration needs. We conclude that V. nonalfalfae has a high …
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Interference and control of sharppod morningglory (Ipomoea cordatotriloba dennstedt) in glyphosate-resistant cotton.
… problematic weeds through depletion of the soil seedbank.
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Ecological significance of variation in Themeda triandra Forsk : a case of intra-specific divergence in life history strategies?
… environments of source populations. Fecundity, seedbank characteristics, seedling numbers and population size structure were compared in field and glasshouse experiments. Production characteristics were compared in a clipping experiment conducted in the field. Results showed that different …
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The Use of Veld Restoration Techniques for Rehabilitating Degraded Waterberg Mountain Bushveld in Lapalala Wilderness Reserve, Limpopo Province
… the ground. Secondly, while the natural seedbank may provide seeds for pioneer plants to establish in a favourable environment with increased moisture and loose soil, the natural succession process is slow. To accelerate rehabilitation, grass seeds can be sown into furrows. Thirdly, newly …
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