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 36 for “"Plowing"”.
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Plowing by Moonlight: Notes from a Food Oasis
Plowing by Moonlight is a creative nonfiction exploration of the relationship between the people of Bainbridge Island, Washington, and the food they grow, eat, and share.
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Broken Ground: Plowing and America's Cultural Landscape in the 1930s
… considers the significance of images related to plowing from the 1930s and their connection to humanity's relationship with the land. Environmental history, agricultural history, and the cultural geography of the plains are used in the analysis of these images to suggest the pervasiveness of the …
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Simulating the effects of double plowing and date of planting on sorghum yields in Botswana
Call number: LD2668 .T4 AGRN 1988 T565
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Simulating the effects of double plowing and date of planting on sorghum yields in Botswana
Call number: LD2668 .T4 AGRN 1988 T565
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Press fit design : force and torque testing of steel dowel pins in brass and nylon samples
… fit forces proved difficult to predict due to plowing effects in tight interference press fits where material yielding was observed. However, once vertical force was removed, torque was applied to each sample. The observed torque values matched press fit theory well suggesting that the …
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Development and estimation of traffic data-based operational measures for effective winter snow management
… measures that can quantify the effects of snow plowing activities are still lacking. To be sure, the existing approaches developed to date employed the variations of traffic speed or travel time during the snow events and those measures cannot fully reflect the road weather conditions when …
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Optimization of vehicle routing and scheduling with travel time variability - application in winter road maintenance
… road maintenance operations (e.g., salting, plowing). The objective of this research was to minimize the total vehicle travel time to complete a given set of service tasks, subject to resource constraints (e.g., truck capacity, fleet size) and operational constraints (e.g., service time …
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Scheduling and routing of service trucks and planning of resource replenishment locations for winter roadway maintenance
… a given set of snow routes with multiple plowing priorities, and to reduce the longest individual truck operation time in order to balance the distribution of such travel times for multiple classes of priority. The objective of the formulation includes the weighted sum of the total …
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Environmental Impact of Pasture-Based Milk Production in Integrated Crop-Livestock Systems
… (NO₃) leaching after GC ley termination. Spring plowing significantly reduced both cumulative N₂O emissions and NO₃ leaching during subsequent wheat cultivation compared to autumn plowing, providing a practical strategy to minimize N losses in ley-arable systems. This dissertation demonstrates …
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Friction and Wear of Polytetrafluoroethylene/Graphene Oxide Composite Thin Films
… films experienced large amounts of delamination, plowing, and global shearing of PTFE bands within the wear track during friction and wear testing. The addition of GO particles impeded global shearing of the PTFE bands while slowing the wear rate of thin PTFE films through load support. Upon the …
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Investigation of Ultimate Bending Strength of Steel Bracket Plates
… most of the connection ductility comes from bolt plowing. These results can be used for splice plate connections in cantilever construction, as well.
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Effect of environment on athletic ability
… every time he saw a prospective football player plowing a field he would stop and ask directions to the next town. If the boy just told him how to get there he would depart, but if the boy picked up the plow and pointed in the direction he should go he would immediately ask him to come to his …
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Biotribology: The Effect of Lubricant and Load on Articular Cartilage Wear and Friction
… and histologic sections showed evidence of plowing and surface delamination, as well as another wear mechanism that produced wear markings perpendicular to the direction of sliding. Opaque films remained on the polished stainless steel disks after saline and hyaluronic acid tests, but not …
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DEM-based numerical simulation of drainage plows and dewatering trenchers
… operating in sand and clay soils at various plowing depths are investigated. Key geometric parameters considered in the optimization include mole shape, plow position relative to tracks, plow back angle, mole length-to-height ratio, and plow point geometry. Results indicate that optimized …
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Gender Impacts of Molecular-Assisted Breeding: The Case of Insect and Disease Resistant Cassava in Nigeria
… both male and female adopters for clearing and plowing which are normally done by men. Significant determinants of female labor supply are number of children in the household, percent of females in the household providing labor on the farm, area under improved cassava varieties and total land …
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Dynamic analysis of a tracked snowplowing vehicle and assessment of ride quality
… mobility. The ride dynamics of a modern snowplowing vehicle is analyzed through systematic considerations of the track dynamics, track-terrain interaction, road wheel suspension, snowplowing forces, road wheel-track interactions, secondary suspension and biodynamic behavior of the driver. An …
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Tribological behavior of unfilled and carbon fiber reinforced polyether ether ketone/polyether imide composites
… load. The wear mechanism of pure PEEK matrix was plowing and as the weight percentage of PEI in the blend was increased the wear mechanism changed to the generation of small particles. The wear rates of the unfilled PEEK/PEI blends were found to be a function of not only the blend composition, but …
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When the Soil Was Everything: Unearthing the Roots of American Environmental Writing
… instead of manuring and rotating crops, plowing vertically on hillsides, and planting the same crop on the same land year after year left much of the nation's farmland eroded or exhausted. Agricultural writers enjoined farmers to improve the soil on their farms. Given the primacy these …
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