Assessing The Spatial Accuracy And Precision Of Lidar For Remote Sensing In Agriculture,
2018
University of Kentucky
Assessing The Spatial Accuracy And Precision Of Lidar For Remote Sensing In Agriculture, Surya Saket Dasika
Theses and Dissertations--Biosystems and Agricultural Engineering
The objective of this whole study was to evaluate a LiDAR sensor for high-resolution remote sensing in agriculture. A linear motion system was developed to precisely control the dynamics of LiDAR sensor in effort to remove uncertainty in the LiDAR position/velocity while under motion. A user control interface was developed to operate the system under different velocity profiles and log LiDAR data synchronous to the motion of the system. The LiDAR was then validated using multiple test targets with five different velocity profiles to determine the effect of sensor velocity and height above a target on measurement error. The results …
Evaluation Of White Rot Fungus As A Pretreatment For Thermochemical Processing Of Switchgrass,
2018
University of Kentucky
Evaluation Of White Rot Fungus As A Pretreatment For Thermochemical Processing Of Switchgrass, Melody Embry
Theses and Dissertations--Biosystems and Agricultural Engineering
Hydrothermal liquefaction is a thermochemical technique for obtaining crude bio-oil from lignocellulosic biomass with moderate temperature and pressure. The crude bio-oil can then be upgraded to various biofuels and bioproducts. Hydrothermal liquefaction is amenable to use of biomass feedstocks that have high-moisture. The overall goal of this research is to demonstrate the effectiveness of white rot fungus (WRF) as a pretreatment option in the production of bio-oil from switchgrass through hydrothermal liquefaction. If WRF is an effective pretreatment, it could be a cost-effective option for commercialization, allowing hydrothermal liquefaction to be used on an industrial scale to produce high quality …
Application Of A Multi-Hybrid Planter For Geospatial Assessment Of Zone-Based Corn Hybrid And Soybean Seed Treatment Performance For Optimized Crop Production,
2018
University of Nebraska - Lincoln
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 Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research
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 …
Comparison Of Three Regionalization Techniques For Predicting Streamflow
In Ungaged Watersheds In Nebraska, Usa Using Swat Model,
2018
University of Nebraska - Lincoln
Comparison Of Three Regionalization Techniques For Predicting Streamflow In Ungaged Watersheds In Nebraska, Usa Using Swat Model, Michael W. Van Liew, Aaron R. Mittelstet
Biological Systems Engineering: Papers and Publications
This study compared three approaches, regional averaging, nearest neighbor, and donor techniques, to regionalize parameters in the Soil and Water Assessment Tool (SWAT) on eleven watersheds located in the Dissected Plains, Plains, and Rolling Hills Landforms in the eastern portion of the State of Nebraska, USA. Within the Rolling Hills Landform, three watersheds were randomly selected as calibration watersheds while two were randomly selected as validation watersheds. Two watersheds were randomly selected as calibration watersheds while one was randomly selected as a validation watershed within each of the Dissected Plains and Plains Landforms. The seven calibration watersheds were used to …
Impact Of Eastern Redcedar Proliferation On Water
Resources In The Great Plains Usa—Current State
Of Knowledge,
2018
Oklahoma State University
Impact Of Eastern Redcedar Proliferation On Water Resources In The Great Plains Usa—Current State Of Knowledge, Chris B. Zou, Dirac Twidwell, Christine H. Bielski, Dillon T. Fogarty, Aaron R. Mittelstet, Patrick J. Starks, Rodney E. Will, Yu Zhong, Bharat Sharma Acharya
Biological Systems Engineering: Papers and Publications
In the Great Plains of the central United States, water resources for human and aquatic life rely primarily on surface runoff and local recharge from rangelands that are under rapid transformation to woodland by the encroachment of Eastern redcedar (redcedar; Juniperus virginiana) trees. In this synthesis, the current understanding and impact of redcedar encroachment on the water budget and water resources available for non-ecosystem use are reviewed. Existing studies concluded that the conversion from herbaceous-dominated rangeland to redcedar woodland increases precipitation loss to canopy interception and vegetation transpiration. The decrease of soil moisture, particularly for the subsurface soil layer, …
Integration Of Hydrogeophysical Datasets And Empirical Orthogonal Functions For Improved Irrigation Water Management,
2018
University of Nebraska-Lincoln
Integration Of Hydrogeophysical Datasets And Empirical Orthogonal Functions For Improved Irrigation Water Management, Catherine E. Finkenbiner, Trenton E. Franz, Justin P. Gibson, Derek M. Heeren, J. D. Luck
Biological Systems Engineering: Papers and Publications
Precision agriculture offers the technologies to manage for infield variability and incorporate variability into irrigation management decisions. The major limitation of this technology often lies in the reconciliation of disparate data sources and the generation of irrigation prescription maps. Here the authors explore the utility of the cosmic-ray neutron probe (CRNP) which measures volumetric soil water content (SWC) in the top ~ 30 cm of the soil profile. The key advantages of CRNP is that the sensor is passive, non-invasive, mobile and soil temperature-invariant, making data collection more compatible with existing farm operations and extending the mapping period. The objectives …
Phenotypic Responses To
Interspecies Competition And
Commensalism In A Naturally Derived
Microbial Co-Culture,
2018
Pacific Northwest National Laboratory
Phenotypic Responses To Interspecies Competition And Commensalism In A Naturally Derived Microbial Co-Culture, Nymul Khan, Yukari Maezato, Ryan S. Mcclure, Colin J. Brislawn, Jennifer M. Mobberley, Nancy Isern, William B. Chrisler, Lye Meng Markillie, Brett M. Barney, Hyun-Seob Song, William C. Nelson, Hans C. Bernstein
Biological Systems Engineering: Papers and Publications
The fundamental question of whether different microbial species will co-exist or compete in a given environment depends on context, composition and environmental constraints. Model microbial systems can yield some general principles related to this question. In this study we employed a naturally occurring co-culture composed of heterotrophic bacteria, Halomonas sp. HL-48 and Marinobacter sp. HL- 58, to ask two fundamental scientific questions: 1) how do the phenotypes of two naturally co-existing species respond to partnership as compared to axenic growth? and 2) how do growth and molecular phenotypes of these species change with respect to competitive and commensal interactions? We …
Surface Detention On Cropland, Rangeland, And Conservation Reserve Program Areas,
2018
Adjunct Professor, Biological Systems Engineering
Surface Detention On Cropland, Rangeland, And Conservation Reserve Program Areas, John E. Gilley
Biological Systems Engineering: Papers and Publications
One of the factors contributing to overland flow on upland areas is water stored temporarily in a thin sheet on the soil surface as surface detention. This study was conducted to quantify surface detention on selected cropland, rangeland, and Conservation Reserve Program (CRP) sites. Surface detention was determined from the recession portion of runoff hydrographs corresponding with the period when rainfall had ceased but runoff continued. The hydrographs were generated from six previously reported rainfall simulation studies conducted on paired 3.7 m wide 10.7 m long plots on which approximately 128 mm of rainfall was applied. Surface detention values …
Evaluation Of The Accuracy Of Machine
Reported Can Data For Engine
Torque And Speed (J1939),
2018
University of Nebraska - Lincoln
Evaluation Of The Accuracy Of Machine Reported Can Data For Engine Torque And Speed (J1939), Rodney A. Rohrer, Joe D. Luck, Santosh K. Pitla, Roger M. Hoy
Biological Systems Engineering: Papers and Publications
Most modern off-road machinery use embedded electronic controllers connected to a controller area network (CAN) to broadcast machine information for on-board processes and diagnostics. Commercially available tools can record CAN data for a variety of research and commercial uses. For agricultural tractors, there is an opportunity to create advanced test procedures that are more representative of field operations and that could supplement existing machine performance tests, such as the OECD Code 2 Standard Code for the Official Testing of Agricultural and Forestry Tractor Performance. CAN parameters provide an efficient way to collect tractor performance data during field operations. However, the …
Near Infrared Fluorescent Single
Walled Carbon Nanotubes As Tissue
Localizable Biosensors,
2018
University of Nebraska-Lincoln
Near Infrared Fluorescent Single Walled Carbon Nanotubes As Tissue Localizable Biosensors, Nicole M. Iverson, Michael S. Strano, Nigel F. Strano, Thomas P. Mcnicholas
Biological Systems Engineering: Papers and Publications
A nanosensor for detecting an analyte can include a sub strate, a photoluminescent nanostructure, and a polymer interacting with the photoluminescent nanostructure. The nanosensor can be used in in vivo for biomedical applications.
Nitric Oxide Sensors For Biological Applications,
2018
University of Nebraska-Lincoln
Nitric Oxide Sensors For Biological Applications, Nicole M. Iverson, Eric M. Hofferber, Joseph A. Stapleton
Biological Systems Engineering: Papers and Publications
Nitric oxide (NO) is an essential signaling molecule within biological systems and is believed to be involved in numerous diseases. As a result of NO’s high reaction rate, the detection of the concentration of NO, let alone the presence or absence of the molecule, is extremely difficult. Researchers have developed multiple assays and probes in an attempt to quantify NO within biological solutions, each of which has advantages and disadvantages. This review highlights many of the current NO sensors, from those that are commercially available to the newest sensors being optimized in research labs, to assist in the understanding and …
Effects Of Subsurface Drainage Systems
On Water And Nitrogen Footprints
Simulated With Rzwqm2,
2018
Iowa State University
Effects Of Subsurface Drainage Systems On Water And Nitrogen Footprints Simulated With Rzwqm2, Kristina J. Craft, Matthew J. Helmers, Robert W. Malone, Carl H. Pederson, Linda R. Schott
Biological Systems Engineering: Papers and Publications
Developing drainage water management (DWM) systems in the Midwest to reduce nitrogen (N) transport to the northern Gulf of Mexico hypoxic zone requires understanding of the long-term performance of these systems. Few studies have evaluated long-term impacts of DWM, and the simulation of controlled drainage (CD) with the Root Zone Water Quality Model (RZWQM) is limited, while shallow drainage (SD) has not been examined. We tested RZWQM using nine years (2007-2015) of field data from southeast Iowa for CD, SD, conventional drainage (DD), and undrained (ND) systems and simulated the long-term (1971-2015) impacts. RZWQM accurately simulated N loss in subsurface …
A Multi-Criteria And Dynamic Sustainability Assessment Of Crop Rotation Alternatives,
2018
Old Dominion University
A Multi-Criteria And Dynamic Sustainability Assessment Of Crop Rotation Alternatives, Saturnina Fabian Nisperos
Computational Modeling & Simulation Engineering Theses & Dissertations
With the food security challenge faced by nations globally, agriculture sustainability has been a significant consideration for concerned agencies. Sustainability assessments are significant tools in providing support to stakeholders in their crop production planning. Agricultural sustainability assessment, however, is complex and it involves numerous criteria that can be conflicting. Limitations on crop rotation sustainability assessment methods include: non-dynamic assessment; lack of regard to cover crops and to the individual crop production preferences of farmers; and focused only on single-year and single-crop rotation. We sought to address these limitations by developing a multi-criteria and dynamic sustainability assessment model that considers the …
Detection Of Multi-Tomato Leaf Diseases (Late Blight, Target And Bacterial Spots) In Different Stages By Using A Spectral-Based Sensor,
2018
Xihua University
Detection Of Multi-Tomato Leaf Diseases (Late Blight, Target And Bacterial Spots) In Different Stages By Using A Spectral-Based Sensor, Jinzhu Lu, Reza Ehsani, Yeyin Shi, Ana Isabel De Castro, Shuang Wang
Biological Systems Engineering: Papers and Publications
Several diseases have threatened tomato production in Florida, resulting in large losses, especially in fresh markets. In this study, a high-resolution portable spectral sensor was used to investigate the feasibility of detecting multi-diseased tomato leaves in different stages, including early or asymptomatic stages. One healthy leaf and three diseased tomato leaves (late blight, target and bacterial spots) were defined into four stages (healthy, asymptomatic, early stage and late stage) and collected from a field. Fifty-seven spectral vegetation indices (SVIs) were calculated in accordance with methods published in previous studies and established in this study. Principal component analysis was …
Evaluation Of Variable Rate Irrigation Using A Remote-Sensing-Based Model,
2018
University of Nebraska-Lincoln
Evaluation Of Variable Rate Irrigation Using A Remote-Sensing-Based Model, John Burdette Barker, Derek M. Heeren, Christopher M.U. Neale, Daran Rudnick
Biological Systems Engineering: Papers and Publications
Improvements in soil water balance modeling can be beneficial for optimizing irrigation management to account for spatial variability in soil properties and evapotranspiration (ET). A remote-sensing-based ET and water balance model was tested for irrigation management in an experiment at two University of Nebraska-Lincoln research sites located near Mead and Brule, Nebraska. Both fields included a center pivot equipped with variable rate irrigation (VRI). The study included maize in 2015 and 2016 and soybean in 2016 at Mead, and maize in 2016 at Brule, for a total of 210 plot-years. Four irrigation treatments were applied at Mead, including: VRI based …
The Open Source Gaitor Suite For
Rodent Gait Analysis,
2018
University of Florida
The Open Source Gaitor Suite For Rodent Gait Analysis, Brittany Y. Jacobs, Emily H. Lakes, Alex J. Reiter, Spencer P. Lake, Trevor R. Ham, Nic D. Leipzig, Stacy L. Porvasnik, Christine E. Schmidt, Rebecca A. Wachs, Kyle D. Allen
Biological Systems Engineering: Papers and Publications
Locomotive changes are often associated with disease or injury, and these changes can be quantified through gait analysis. Gait analysis has been applied to preclinical studies, providing quantitative behavioural assessment with a reasonable clinical analogue. However, available gait analysis technology for small animals is somewhat limited. Furthermore, technological and analytical challenges can limit the effectiveness of preclinical gait analysis. The Gait Analysis Instrumentation and Technology Optimized for Rodents (GAITOR) Suite is designed to increase the accessibility of preclinical gait analysis to researchers, facilitating hardware and software customization for broad applications. Here, the GAITOR Suite’s utility is demonstrated in 4 models: …
Greenhouse Gas Emissions From Beef Feedlot Surface Materials As Affected By Diet, Moisture, Temperature, And Time,
2018
USDA-ARS
Greenhouse Gas Emissions From Beef Feedlot Surface Materials As Affected By Diet, Moisture, Temperature, And Time, Bryan L. Woodbury, John E. Gilley, David B. Parker, Bobbi S. Stomer
Biological Systems Engineering: Papers and Publications
A laboratory study was conducted to measure the effects of diet, moisture, temperature, and time on greenhouse gas (GHG) emissions from feedlot surface materials (FSM). The FSM were collected from open-lot pens where beef cattle were fed either a dry-rolled corn (DRC) diet containing no wet distillers grains with solubles (WDGS) or a DRC diet containing 35% WDGS. The FSM were collected, air-dried or mixed with 3.0 L of water to represent dry or wet conditions, and then incubated at temperatures of 5°C, 15°C, 25°C, or 35°C. Static flux chambers were used to quantify GHG emissions over a 14-day period. …
Impacts Of Cover Crops On Soil Physical Properties: Field Capacity, Permanent Wilting Point, Soil-Water Holding Capacity, Bulk Density, Hydraulic Conductivity, And Infiltration,
2018
The Pennsylvania State University
Impacts Of Cover Crops On Soil Physical Properties: Field Capacity, Permanent Wilting Point, Soil-Water Holding Capacity, Bulk Density, Hydraulic Conductivity, And Infiltration, Suat Irmak, Vivek Sharma, Ali T. Mohammed, Koffi Djaman
Biological Systems Engineering: Papers and Publications
Field experiments were carried out to quantify the effects of cover cropping on soil physical properties. Field capacity (FC), permanent wilting point (PWP), soil-water holding capacity (SWHC), bulk density ( b), saturated and unsaturated hydraulic conductivity (Ks and Kus, respectively), and infiltration rates were measured and compared for four land cover treatments [cover crop without seed maize (CC), seed maize followed by cover crop (SCCC), bare soil, and seed maize without cover crop (SC)] in three large-scale production fields (~64 ha each) with silt loam soil in the 2012-2013, 2013-2014, 2014-2015, and 2015-2016 cover crop growing seasons. All production …
Prediction Of Agricultural Implement Hydraulic Power Requirements Using Controller Area Network Bus Data,
2018
University of Nebraska - Lincoln
Prediction Of Agricultural Implement Hydraulic Power Requirements Using Controller Area Network Bus Data, Gabriel P. Stoll, Rodney A. Rohrer, Santosh K. Pitla, Joe D. Luck
Biological Systems Engineering: Papers and Publications
One of the important challenges in agricultural machinery research is the ability to effectively determine power requirements of a given field operation. The Controller Area Network (CAN) Bus, also known as ISOBUS, has proven to be an effective digital tool for tractor and implement data collection. This study attempted to determine implement hydraulic power requirements using a combination of existing public tractor CAN messages and minimal added sensors. The sensor signals were published on the CAN bus for ease of simultaneous sensor signal and CAN message data collection. Based upon the available CAN messages, this study attempted to measure hydraulic …
Effects Of Alternate Wetting And Drying Irrigation
Regime And Nitrogen Fertilizer On Yield And Nitrogen
Use Efficiency Of Irrigated Rice In The Sahel,
2018
New Mexico State University
Effects Of Alternate Wetting And Drying Irrigation Regime And Nitrogen Fertilizer On Yield And Nitrogen Use Efficiency Of Irrigated Rice In The Sahel, Koffi Djaman, Valere C. Mel, Lamine Diop, Abdoulaye Sow, Raafat El-Namaky, Baboucarr Manneh, Kazuki Saito, Koichi Futakuchi, Suat Irmak
Biological Systems Engineering: Papers and Publications
The objectives of this study were to investigate water saving strategies in the paddy field and to evaluate the performance of some of the newly released rice varieties. Field experiments were conducted at Fanaye in the Senegal River Valley during two rice growing seasons in 2015. Three irrigation regimes ((i) continuous flooding, (ii) trigging irrigation at soil matric potential (SMP) of 30 kPa, (iii) trigging irrigation at SMP of 60 kPa) were tested in an irrigated lowland rice field. Irrigation regimes (ii) and (iii) are alternate wetting and drying (AWD) cycles. Four inbred rice varieties (NERICA S-21, NERICA S-44, Sahel …
