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Bioresource and Agricultural Engineering
Department of Biological Systems Engineering: Dissertations and Theses
- Keyword
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- Remote sensing (2)
- Unmanned aerial systems (2)
- 3D point cloud (1)
- 3H/3He (1)
- Agricultural extension (1)
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- Agriculture (1)
- Agriculture technology (1)
- As-applied (1)
- CAN (1)
- Case Study (1)
- Corn hybrids (1)
- Eastern redcedar (1)
- Evapotranspiration (1)
- Fluopyram (1)
- Food-energy-water (1)
- GPS (1)
- Game-Based Learning (1)
- Geospatial (1)
- Groundwater age (1)
- Groundwater monitoring (1)
- Groundwater nitrate (1)
- Groundwater recharge rates (1)
- Groundwater transit time (1)
- High-throughput plant phenotyping (1)
- Irrigation (1)
- Isotopes (1)
- Leaf angle (1)
- Leaf angular distribution (1)
- Leaf area (1)
- LiDAR (1)
Articles 1 - 9 of 9
Full-Text Articles in Engineering
Variable Rate Irrigation Using A Spatial Evapotranspiration Model With Remote Sensing Imagery And Soil Water Content Measurements, Sandeep Bhatti
Variable Rate Irrigation Using A Spatial Evapotranspiration Model With Remote Sensing Imagery And Soil Water Content Measurements, Sandeep Bhatti
Department of Biological Systems Engineering: Dissertations and Theses
Variable rate irrigation may help in intensification of agriculture by producing more yield per unit inputs. Real time spatial information about water balance components is important for designing VRI prescription maps. This work involved use of a spatial evapotranspiration model for studying spatial variability in an agricultural field at the Eastern Nebraska Research and Extension Center near Mead, Nebraska. Imagery from unmanned aerial systems and Landsat were used as input for the spatial evapotranspiration model. Other inputs into the model were soil water content measurements from neutron probes, weather data, crop data, previous irrigation prescriptions, and soil properties for the …
Generation Of 360 Degree Point Cloud For Characterization Of Morphological And Chemical Properties Of Maize And Sorghum, Suresh Thapa
Generation Of 360 Degree Point Cloud For Characterization Of Morphological And Chemical Properties Of Maize And Sorghum, Suresh Thapa
Department of Biological Systems Engineering: Dissertations and Theses
Recently, imaged-based high-throughput phenotyping methods have gained popularity in plant phenotyping. Imaging projects the 3D space into a 2D grid causing the loss of depth information and thus causes the retrieval of plant morphological traits challenging. In this study, LiDAR was used along with a turntable to generate a 360-degree point cloud of single plants. A LABVIEW program was developed to control and synchronize both the devices. A data processing pipeline was built to recover the digital surface models of the plants. The system was tested with maize and sorghum plants to derive the morphological properties including leaf area, leaf …
Soil Health Effects And Stakeholder Perceptions Of Manure And Woody Biomass Application To Cropland In Nebraska, Linda R. Schott
Soil Health Effects And Stakeholder Perceptions Of Manure And Woody Biomass Application To Cropland In Nebraska, Linda R. Schott
Department of Biological Systems Engineering: Dissertations and Theses
Organic products that have historically been viewed as waste products may improve soil health by adding carbon (C) and nutrients to soil. Two such products are woodchips, generated from forest or rangeland management activities, and livestock manure. In Nebraska, eastern redcedar (Juniperus virginiana L.) is a native but invasive tree species inhibiting rangeland productivity. Livestock manure that is underutilized while inorganic fertilizers are imported for crop production presents a water quality risk by contributing to local- and regional-scale nutrient imbalances. Increasing the responsible use of livestock manure in crop fertility programs to improve sustainability of both livestock and crop farms …
Developing Serious Games In Engineering Education: Innovation At The Nexus Of Food, Energy, And Water Systems, Nathan Rice
Developing Serious Games In Engineering Education: Innovation At The Nexus Of Food, Energy, And Water Systems, Nathan Rice
Department of Biological Systems Engineering: Dissertations and Theses
At a time when food, energy, and water (FEW) are of the utmost concern to the security and health of the world, an initiative has begun to understand the interactions between these systems. The goal of Innovation at the Nexus of Food, Energy, and Water Systems (INFEWS) is to bring together research fields that typically work in their own silos to solve complex problems increasing the resiliency and sustainability of the FEW system. Stemming from this initiative was a project to produce an educational immersive simulation game to teach youth about how their food is produced, systems thinking, and sustainable …
Assessing The Relationship Between Groundwater Nitrate Concentrations And Environmental Variables Through Repeat Sampling And Statistical Machine Learning: Dutch Flats, Nebraska, Martin Wells
Department of Biological Systems Engineering: Dissertations and Theses
Nitrate-contaminated aquifers are common in landscapes dominated by agricultural land use. Health concerns related to consuming nitrate-contaminated groundwater are well documented and continued research aimed at decreasing concentrations is critical. A 1990s U.S. Geological Survey (USGS) study focused on groundwater characteristics in the Dutch Flats area of western Nebraska. Agricultural-related practices were determined to largely influence groundwater recharge and nitrate concentrations ([NO3-]). Since the conclusion of the USGS study, a transition to more efficient irrigation technology has been observed in this region. The emphasis of this 2016 study was to resample several well nests examined in 1998 …
An Evaluation Of Unmanned Aerial System Multispectral And Thermal Infrared Data As Information For Agricultural Crop And Irrigation Management, Mitch Maguire
Department of Biological Systems Engineering: Dissertations and Theses
Spatial irrigation management has been steadily advancing over the last several years. A current issue with managing irrigation spatially on sub-field scale is the inability to readily collect the spatial field data necessary to properly manage irrigation. Multispectral and thermal infrared imagery used in informing irrigation management decisions was previously collected by satellite and manned aircraft remote sensing platforms. These remote sensing platforms pose issues concerning economic feasibility, revisit intervals, and weather factors that inhibit the collection of data. Recent developments in unmanned aerial systems, which provide an additional means of collecting multispectral and thermal infrared data, have the potential …
Developing An Integrated Model For The Corn, Ethanol, And Beef Systems Using A Loosely Coupled Web Framework, Ryan Anderson
Developing An Integrated Model For The Corn, Ethanol, And Beef Systems Using A Loosely Coupled Web Framework, Ryan Anderson
Department of Biological Systems Engineering: Dissertations and Theses
With the global population approaching 9 billion people by the year 2050, the world’s food, energy, and water (FEW) resources must be used more intelligently to provide for everyone. While we understand how individual FEW systems behave using modeling, we cannot understand the full environmental and production impacts of decisions in each system without understanding how they are all linked together. An approach to coupling these systems is starting with identifying a few highly interconnected FEW systems. The corn, ethanol, and beef systems are large economic and agricultural drivers in the Midwest United States and are highly linked. Many individual …
Development Of A Sprayer Performance Diagnostic Tool Using Improved Mapping And Error Quantification Practices, Aaron Shearer
Development Of A Sprayer Performance Diagnostic Tool Using Improved Mapping And Error Quantification Practices, Aaron Shearer
Department of Biological Systems Engineering: Dissertations and Theses
While sprayer technologies have advanced greatly over the past decade and a half, chemical application errors are still prominent in many in-field operations. Over-application of pesticides can cause harm to the crop, reducing yield, and result in added pollution to the environment. Under-application of pesticides fails to control pests within the field, again lowering crop yields, and causing profit loss for the producer. Current operator feedback from in-field pesticide application operations conveys limited information and often times does not allow the operator to visualize a true representation of their performance. Farm Management Information Systems (FMIS) typically do not account for …
Application Of A Multi-Hybrid Planter For Geospatial Assessment Of Zone-Based Corn Hybrid And Soybean Seed Treatment Performance For Optimized Crop Production, Rachel Stevens
Department of Biological Systems Engineering: Dissertations and Theses
The ability to variably plant multiple hybrids or treatments during field operation has been identified as one option for mitigating in-field variation caused by soil, disease pressures, environmental and water conditions. While the system performance has been validated, producers still have questions concerning development of management zones, hybrid and treatment assignment, and economic advantage from implementation. Assessment of a multi-hybrid planting platform was conducted during the 2016 and 2017 growing seasons. On-farm trials were performed on ten corn fields and five soybean fields in eastern Nebraska. Corn trials focused on placement of two contrasting hybrids for soil type and water …