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 20 for “"High tunnel"”.
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Robotics in high tunnel agriculture: perception-driven harvesting and crop monitoring in unstructured environments
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Fruit cluster pruning impacts on yield and quality of three tomato cultivars in an organic high tunnel system
The successful production of high-quality, high-yielding crops is important for fruit and vegetable producers, especially growers who use high tunnels. The valuable space within a high tunnel is well-suited to organic farming and can be used to grow many specialty crops. Fruit load management is …
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An Economic Comparison of High Tunnel and Open-Field Strawberry Production in Southeastern Virginia and A Joint Estimation of Acreage Planted to U.S. Major Crops
… returns from producing strawberries in the high tunnel compared to the open-field in Southeast Virginia. We develop and compare budgets for eight strawberry cultivars grown in the two environments and sold under three marketing strategies (pre-pick wholesale, pre-pick retail, and U-pick). …
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Assessing the conservation value and food system impacts of high tunnels
… sold locally, but climate often limits supply. High tunnels can often overcome these limitations. In order to encourage local availability and production of specialty crops the Natural Resource Conservation Service (NRCS) has launched the Seasonal High Tunnel initiative. This cost-share program …
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Assessing Net Returns to Blueberry Production Using a Decision Support Tool
… to develop and assess the profitability of four highbush blueberry farming systems in the south: organic field production, conventional field production, organic high tunnel production and conventional high tunnel production. Four baseline budget scenarios, one for each system, are developed for …
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Effect of Nitrogen Fertilizer Rates and Two-Spotted Spider Mite Incidence on 'Strawberry Festival' Strawberry Cultivar Performance
… techniques to improve yield and fruit quality. High tunnel strawberry production has the potential to become a profitable and sustainable production system; however, information on nutrient and pest management is limited.</p> <p>The overall objective of this study was to determine the response …
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Evaluation of Grafting Rootstocks on Plant Growth, Fruit Yield and Quality in Tomato (Lycopersicon esculentum Mill).
… conducted under a protected environment (in a high tunnel) at the University of Venda, Thohoyandou, South Africa. Four tomato rootstocks (‘Powapak’, ‘Everest’, ‘Matterhorn’ and ‘Golf’) and two scion cultivars (‘Money Maker’ and ‘Rodade’) were used to develop 10 scion x rootstock combinations. …
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Soil quality and nitrogen cycling dynamics altered by fertility amendments in intensively managed vegetable production systems
… of increased demand for locally-sourced food. High tunnels are becoming increasingly popular among Midwest vegetable growers as these structures offer many production benefits including season extension. However, vegetables require substantial fertility inputs, particularly nitrogen (N), in …
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Controlled and protected environment production of blueberries in the Midwest United States
For a high value crop such as blueberries, managing growth using both controlled and protected environments may allow for extended or year-round production in the Midwest United States. A series of experiments were conducted in Kansas within a high tunnel and a glass greenhouse to evaluate the …
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Effects of plastic mulch, row cover, and cultivar selection on growth of tomatoes (Lycopersicon esculerntum Mill.) in high tunnels
… among different cultivars when grown in high tunnels. Row covers did not significantly increase total, or US number 1 yield of high tunnel tomatoes. Clear plastic mulch significantly increases early yield of grade 1 fruit over all other treatments. Total early yields from BHN 543, and …
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Essays on the Economics of Policy and Regulation in Agricultural and Food Markets
… weather data, and the monitored performance of high tunnel at horticultural trials from research farms. Our results show that when there are significant price premiums for early season fruit, a high tunnel system could be the optimal strategy as it has the capacity to generate higher net profits …
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Microwave Spectroscopy and Transport Measurements of Andreev Bound States in Superconductor – Semiconductor Josephson Junctions
… reflectometry measurements of a superconducting tunnel junction are made sensitive near the high tunnel resistance by an impedance transforming tank circuit which can be adapted for different device resistances. The reflectometry measurement corresponds well with DC transport data meaning this …
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Investigating Forward Flight Multirotor Wind Tunnel Testing in a 3-By 4-Foot Wind Tunnel
… multirotor aerodynamic phenomena via wind tunnel experimentation is becoming extremely important with the rapid progress in advanced distributed propulsion VTOL concepts. Much of this experimentation is being performed in large, highly advanced tunnels. However, the proliferation of this …
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Crop traits to improve plant water relations under abiotic stresses
… crop productivity under these stresses are highlighted and enriched with experimental evidence, to support breeding programs in light of climate-smart agriculture and sustainability, and finally to ensure food security. The studies are focused on tomato and grapevine, as they are currently …
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Chemical Manipulation of Honey Bee Behavior
… deter bee foragers from a sugar feeder in a high-tunnel experiment as well as from melon flowers and knapweed in field experiments. Electroantennogram recordings were conducted to verify an olfactory response of the bees to the tested compounds. Pheromonal compounds were readily detected by …
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Spotted-wing Drosophila: Investigating the Efficacy of Innovative and Alternative Management Techniques
… result in widespread infestation likely due to high SWD populations, immigration by new individuals, and/or inadequate spray penetration in the dense plant canopy. Frequent applications of broad spectrum insecticides continues to be the most prevalent management strategy, but pesticide …
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Nitrogen Fate and Transformations in the Production of Containerized Specialty Crops
… in a pine bark substrate in either open wall high tunnel or a glass greenhouse to determine subsequent reaction sequence and fate based on applied N source. By applying an individual form of N it was determined that based on the N source applied, a sequential set of reactions occurs based on …
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Monitoring and management of thrips populations in vegetables, row crops, and greenhouse crops in Virginia
… to feeding and oviposition of these insects in high densities. In addition, both F. fusca and F. occidentalis can transmit plant pathogenic tospoviruses, such as tomato spotted wilt virus (TSWV), in certain susceptible crops. While all of these thrips species are difficult to detect due to their …
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Epidemiological studies and sustainable approaches for the control of strawberry powdery mildew
… the spatiotemporal dispersal of the disease in high tunnels; (iv) to quantify the role of overwintering inoculum and evaluate post-winter leaf removal for the control of early-season primary infection; and (v) to develop a management strategy by limiting synthetic fungicides to early-season …