Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

PDF

Bioresource and Agricultural Engineering

Institution
Keyword
Publication Year
Publication
Publication Type

Articles 211 - 240 of 3633

Full-Text Articles in Life Sciences

Impact Of 4r Management On Crop Production And Nitrate-Nitrogen Loss In Tile Drainage, Matthew Helmers, Carl Pederson, John Sawyer, Terry Tuttle Jan 2018

Impact Of 4r Management On Crop Production And Nitrate-Nitrogen Loss In Tile Drainage, Matthew Helmers, Carl Pederson, John Sawyer, Terry Tuttle

Farm Progress Reports

Corn belt corn and soybean producers increasingly are challenged to maximize crop production while addressing the contributions farm practices make to the Gulf of Mexico hypoxia. Based on the need for nitrate-N reductions to meet water quality goals, new management practices are needed to reduce nitrate-N losses at minimal cost and maximum economic benefits. This three-year field research and demonstration project evaluates various promising N management methods and technologies by documenting the nitrate-N export and crop yield.


Drainage Water Quality Impacts Of Agricultural Management Practices: Effect Of Manure Application Timing And Cover Crops, Brian Dougherty, Carl Pederson, Michelle Soupir, Dan Andersen Jan 2018

Drainage Water Quality Impacts Of Agricultural Management Practices: Effect Of Manure Application Timing And Cover Crops, Brian Dougherty, Carl Pederson, Michelle Soupir, Dan Andersen

Farm Progress Reports

The primary objective of this study is to evaluate the impact of various cropping and nutrient management systems on drainage water quality and crop yields. Treatment comparisons evaluate the impact of liquid swine manure application timing, nitrification inhibitor with late fall swine manure application, cereal rye cover crop, and gypsum application. These comparisons will be conducted for multiple years and used to develop appropriate manure and nutrient management practices in order to minimize water contamination potential and enhance the use of swine manure as a nutrient resource.


Evaluation Of Foliar Fungicides On Soybeans In Central Iowa, Daren Mueller, Yuba Kandel, Stith Wiggs Jan 2018

Evaluation Of Foliar Fungicides On Soybeans In Central Iowa, Daren Mueller, Yuba Kandel, Stith Wiggs

Farm Progress Reports

Foliar fungicides were assessed on soybeans for foliar disease management and yield response across seven Iowa State University research station locations including the Northwest Farm (Sutherland), Northern Farm (Kanawha), Northeast Farm (Nashua), Central Iowa Farms (Ames), Armstrong Farm (Lewis), McNay Farm (Chariton), and Southeast Farm (Crawfordsville).


Development Of The Enviratron Facility, Steven Whitham, Stephen Howell, Carolyn Lawrence-Dill, Thomas Lubberstedt, Lie Tang Jan 2018

Development Of The Enviratron Facility, Steven Whitham, Stephen Howell, Carolyn Lawrence-Dill, Thomas Lubberstedt, Lie Tang

Farm Progress Reports

A proposal to the National Science Foundation’s Major Research Instrumentation Program was funded in 2014 to develop a plant phenotyping facility called the “Enviratron.” The Enviratron, located at the Ag Engineering/Agronomy Research Farm, Boone, Iowa, is a unique concept in which plant performance would be monitored under different environmental conditions, rather than a single environmental condition as is characteristic of other plant phenotyping facilities


Automated Plant Phenotyping Using 3d Machine Vision And Robotics, Yin Bao Jan 2018

Automated Plant Phenotyping Using 3d Machine Vision And Robotics, Yin Bao

Graduate Theses and Dissertations

With the rapid advancements in genotyping technologies, plant phenotyping has become a bottleneck in exploiting the massive genomic data for crop improvement. The common practice of plant phenotyping relies on human efforts, which is labor-intensive, time-consuming, and prone to human errors. This dissertation documents our innovative research in automated plant phenotyping using 3D machine vision and robotics.

Sorghum and maize are important economic crops for food, feed, fuel, and fiber production. Manipulation of plant architecture plays a vital role in yield improvement via plant breeding. A high-throughput, field-based robotic phenotyping system was developed to characterize plant architecture for tall-growing sorghum ...


Particulate Matter Suppression And Heat Stress Relief In A Cage-Free Hen House, Lilong Chai, Hongwei Xin, Yu Wang, Jofran Oliveira, Kailao Wang, Yang Zhao Jan 2018

Particulate Matter Suppression And Heat Stress Relief In A Cage-Free Hen House, Lilong Chai, Hongwei Xin, Yu Wang, Jofran Oliveira, Kailao Wang, Yang Zhao

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Compared to conventional cage production system, cage-free (CF) hen housing offers hens more space and opportunities to exercise their natural behaviors (e.g., perching, dust bathing, and foraging). However, CF housing poses many inherent environmental challenges, among which are high levels of particulate matter (PM). Spraying liquid agent (e.g., 125 mL m-2 per cm litter depth) has been shown to effectively mitigate the generation of PM by 60%-70% from CF henhouse litter in our previous lab-scale tests. The objectives of this study were to verify the lab-study findings of PM reduction with liquid spray on a commercial CF ...


Application Of Ground-Penetrating Radar In Measuring Corn Seeds (Cs) Spacing And Planting Depth In Different Soils, Kenneth O. M. Mapoka, Stuart J. Birrell, David J. Eisenmann Jan 2018

Application Of Ground-Penetrating Radar In Measuring Corn Seeds (Cs) Spacing And Planting Depth In Different Soils, Kenneth O. M. Mapoka, Stuart J. Birrell, David J. Eisenmann

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The effects of seed spacing and depth at planting contribute greatly to corn production. Correct seed spacing, and planting depth may enable moisture absorption which facilitates seedling emergence with the establishment of healthy and robust root structure. Therefore, measuring seed spacing and planting depths in a closed furrow is necessary for precision seeding and corn production. In agricultural applications, Ground Penetrating Radar (GPR) is used for nondestructive evaluations as a potential sensor to maximize the qualitative and precision or repeatable assessments in long-term research. Yet GPR system has not been used to measure seed spacing and planting depths, but it ...


Control Algorithm Development And Simulation For Comparing Evaporative Pads And Sprinklers For Grow-Finish Pigs, Brett C. Ramirez, Steven J. Hoff, Jay D. Harmon Jan 2018

Control Algorithm Development And Simulation For Comparing Evaporative Pads And Sprinklers For Grow-Finish Pigs, Brett C. Ramirez, Steven J. Hoff, Jay D. Harmon

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Seasonal variability attributed to heat stress (HS) has a large economic impact on the US swine industry by reducing daily gain and finishing market weights. Strategies to mitigate HS lack evidence showing effectiveness in different climates and have not been adequately controlled to provide a thermally optimum environment for pigs. Hence, the goal of this study was to describe the initial experimental design and instrumentation as well as develop innovative control algorithms for operating evaporative pads (EPs) and sprinklers. Located in northeast Iowa, a four room (~1,875 head per room) grow-finish facility featured side-by-side rooms separated by a hallway ...


Computer Vision-Based Animal Preference Assessment – Do Laying Hen Chicks Prefer Light With Uva Radiation?, Kai Liu, Kailao Wang, Tao Fei, Lilong Chai, Hongwei Xin Jan 2018

Computer Vision-Based Animal Preference Assessment – Do Laying Hen Chicks Prefer Light With Uva Radiation?, Kai Liu, Kailao Wang, Tao Fei, Lilong Chai, Hongwei Xin

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Poultry have a fourth retinal cone that allows them to see in the ultraviolet A (UVA) wavelength (315-400 nm) and may use UVA perception to modify various behavioral functions such as feeding, peer recognition, mate selection, and social encounters. As UVA perception is an essential part of poultry vision, it may be of socio-economic significance to provide certain amount of UVA light in poultry production facilities, particularly in most of modern facilities where artificial lighting is the only light source for the birds. However, there is limited scientific information regarding how to provide the UVA supplementation to birds as well ...


Mitigating Particulate Matter Emissions Of A Commercial Cage-Free Aviary Hen House, Lilong Chai, Hongwei Xin, Yu Wang, Jofran Oliveira, Kailao Wang, Yang Zhao Jan 2018

Mitigating Particulate Matter Emissions Of A Commercial Cage-Free Aviary Hen House, Lilong Chai, Hongwei Xin, Yu Wang, Jofran Oliveira, Kailao Wang, Yang Zhao

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Concerns over animal welfare among general public and marketing decisions have led to pledges by a number of U.S. food retailers and restaurants to source only cage-free (CF) eggs in the foreseeable future, e.g., by 2025. Compared to conventional cage production system, CF hen housing offers hens more space and opportunities to exercise their natural behaviors (e.g., perching, dust bathing, and foraging). However, CF housing poses many inherent environmental challenges, among which are high levels of particulate matter (PM) and ammonia (NH3). Spraying liquid agent (e.g., 125 mL m-2 per cm litter depth) has been shown ...


Spatial And Diurnal Variations Of Particulate Matter Concentration Of A Pilot-Scale Aviary Layer House In Winter, Yu Wang, Dapeng Li, Suzanne Leonard, Zhengxiang Shi, Hongwei Xin, Lilong Chai, Baoming Li Jan 2018

Spatial And Diurnal Variations Of Particulate Matter Concentration Of A Pilot-Scale Aviary Layer House In Winter, Yu Wang, Dapeng Li, Suzanne Leonard, Zhengxiang Shi, Hongwei Xin, Lilong Chai, Baoming Li

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Laying hen production plays an important role in particulate matter (PM) emissions which potentially cause air pollution and adverse health effect on animals and workers. Aviary cage-free (CF) egg production systems have been attracting increasing attention due to concerns over animal welfare and increased market demand. While studies have been conducted to characterize PM concentrations and emissions of aviary CF houses with litter floor, few reports are available of this information for aviary CF layer houses equipped with slat floor. In this study, PM concentrations – both spatial and diurnal patters inside a pilot-scale aviary CF layer house (1,800 ...


An Image Acquisition System For Studying Behaviors Of Sows And Piglets In Farrowing Barns, Suzanne Leonard, Hongwei Xin, Tami Brown-Brandl, Brett C. Ramirez Jan 2018

An Image Acquisition System For Studying Behaviors Of Sows And Piglets In Farrowing Barns, Suzanne Leonard, Hongwei Xin, Tami Brown-Brandl, Brett C. Ramirez

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Behavior studies in commercial swine farrowing room environments often need to monitor each set of sow and piglets individually and simultaneously. Autonomous computer imaging systems can overcome this challenge. The system presented here utilizes a time of flight depth sensor and a digital camera to capture depth and digital images of each sow and litter, housed in individual farrowing stalls. Depth sensors were centered above the stalls on a triangular truss spanning the length of the farrowing room and mounted in waterproof boxes with attached lids, enabling them to easily be waterproofed when cleaning the farrowing room. Each depth sensor ...


A Sophomore Level Introduction To Engineering Design Course, Norman Muzzy, Michelle L. Soupir, Steven J. Hoff Jan 2018

A Sophomore Level Introduction To Engineering Design Course, Norman Muzzy, Michelle L. Soupir, Steven J. Hoff

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Iowa State University has a sophomore level course that is known as ABE 218. The objectives of this course include learning a structured approach to engineering design, preparing the students for internships, learning the basics of project management, and connecting the theoretical engineering paper designs to physical reality. This informal paper discusses how the course is structured, identifies the lab projects that are part of the course, and discusses some of the results and challenges associated with ABE 218.


Improving And Testing Methods Of Securing Row Cover For Organic Cucurbit Production, Jennifer M. Widmer, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater Jan 2018

Improving And Testing Methods Of Securing Row Cover For Organic Cucurbit Production, Jennifer M. Widmer, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Cucumber beetles feed on leaves of cucurbit crops (i.e. squash and cucumbers) and can transmit bacterial wilt disease, stunt plant growth, and reduce fruit marketability. Several pesticides are available to deter pests, but options are limited for organic growers. As an alternative, row covers can be used to physically block insects contact with the plants. Comparisons between different methods of utilizing row covers to test their effectiveness are limited. Experiments were designed to compare methods of perimeter sealing, material anchoring, and structural support. The success of perimeter sealing was judged by the number of insects found under row covers ...


A Rfid-Based Monitoring System For Characterization Of Perching Behaviors Of Individual Poultry, Kailao Wang, Kai Liu, Hongwei Xin, Lilong Chai, Yu Wang, Tao Fei, Jofran Oliveira, Jinming Pan, Yibin Ying Jan 2018

A Rfid-Based Monitoring System For Characterization Of Perching Behaviors Of Individual Poultry, Kailao Wang, Kai Liu, Hongwei Xin, Lilong Chai, Yu Wang, Tao Fei, Jofran Oliveira, Jinming Pan, Yibin Ying

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Perching is a natural behavior of poultry. However, it is difficult to distinguish individual birds in a large group in order to relate perching behavior to health condition or productivity. To enable such research, this study developed and validated a radio frequency identification (RFID)-based automated perching monitoring system (APMS) for characterizing individual perching behaviors of group-housed poultry. The APMS consisted of a RFID module, a load cell module, and a round wooden perch. The RFID module was comprised of a high-frequency RFID reader, three customized rectangular antennas, and multiple RFID transponders. The load cell module was comprised of a ...


Responses Of Laying Hens To Full Vs. Partial Litter Access In Aviary Housing, Jofran Oliveira, Hongwei Xin Jan 2018

Responses Of Laying Hens To Full Vs. Partial Litter Access In Aviary Housing, Jofran Oliveira, Hongwei Xin

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Cage-free egg production has been a topic of increasing attention in the USA over the past two years. With different cage-free styles and management schemes, retailers have developed their own cage-free criteria. One highly debated aspect is if hens may be kept inside the system for part of the day, during the first few hours after lights-on. Research is lacking regarding the impact of such practice on hen well-being, production performance, and environmental conditions. The objective of this study was to evaluate the effects of providing full litter access (i.e. doors always open) vs. partial litter access (i.e ...


Behavioral And Production Responses Of W-36 Chicks To Supplementary Uva Light, Kai Liu, Kailao Wang, Tao Fei, Lilong Chai, Hongwei Xin Jan 2018

Behavioral And Production Responses Of W-36 Chicks To Supplementary Uva Light, Kai Liu, Kailao Wang, Tao Fei, Lilong Chai, Hongwei Xin

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

UVA (315-400 nm) light perception is an essential part of poultry vision, which may be used to modify behavioral traits of birds such as feeding, peer recognition, and social encounters. The objectives of this study were to assess behavioral and production responses of W-36 chicks reared under LED light with or without various levels of UVA supplementation (0%, 5%, 10%, and 15%), i.e., LED+UVA vs. LED. For behavioral response, a total of 108 chicks (day-old) in 18 groups were assessed for their lighting preference. Each group of chicks was involved an 8-d preference test, during which the birds ...


Prediction Of Extraction Forces For Entrapment Victim In Common Grain Storage Conditions, Charles V. Schwab, Pamela J. Schwab, Lauren E. Schwab Jan 2018

Prediction Of Extraction Forces For Entrapment Victim In Common Grain Storage Conditions, Charles V. Schwab, Pamela J. Schwab, Lauren E. Schwab

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

One contributor to agriculture’s high death rate is confined space fatalities caused by entrapment in granular materials. Over 1,000 grain-related fatalities have been documented by researchers in 43 states, and those states with the largest grain storage capacities have been shown to experience a proportionally large number of the suffocation fatalities. Several researchers have measured extraction forces in specific conditions, but a reference standard for estimating the extraction forces for a grain suffocation victim in common conditions is needed. A prediction model for estimating extraction forces was developed using the principle of boundary shear, an approximation of human ...


Evaluating Row Cover Establishment Systems For Cantaloupe And Summer Squash, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater Jan 2018

Evaluating Row Cover Establishment Systems For Cantaloupe And Summer Squash, H. Mark Hanna, Brian L. Steward, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Publications

Use of row covers offer an alternative to pesticide application for management of insect feeding and disease transmission and can be beneficial for extending the growing season. Unfortunately, labor required to establish cover is significant (particularly for single rows) and larger pieces of multi-row cover are subject to fatigue from wind and sun. Development of a mechanized single-row cover system or a durable multi-row cover system advances potential for use of covers. Field tests of a commercial semi-mechanized cover implement were conducted. Successful wire insertion ranged from 74 to 100% and depended on careful adjustment of the implement. Success was ...


Fan And Ventilation Rate Monitoring Of Cage-Free Layer Houses In California, Xingjun Lin, Ruihong Zhang, Shumei Jiang, Hamed M. El-Mashad, Hongwei Xin Jan 2018

Fan And Ventilation Rate Monitoring Of Cage-Free Layer Houses In California, Xingjun Lin, Ruihong Zhang, Shumei Jiang, Hamed M. El-Mashad, Hongwei Xin

Agricultural and Biosystems Engineering Publications

Ventilation rates were continuously monitored in two cage-free layer houses located in California from March 1, 2012 to May 13, 2013. The average number of brown Lohmann laying hens in each house was 33,300. Temperature, relative humidity, static pressure, and running status of 48 ventilation fans were continuously monitored and recorded every minute. Regression models were developed to relate house temperature and ventilation rate to inlet air temperature, and to relate airflow rate to building static pressure (R2 = 0.98). Results showed that the daily mean ventilation rate per hen ranged from 1.91 to 8.72 m3 h-1 ...


Let’S Stop Treating Our Youth Like Dummies, William E. Field, Yuan-Hsin Cheng, Roger Tormoehlen, Robert Aherin, Charles V. Schwab, Daniel Neenan, Matthew Roberts Jan 2018

Let’S Stop Treating Our Youth Like Dummies, William E. Field, Yuan-Hsin Cheng, Roger Tormoehlen, Robert Aherin, Charles V. Schwab, Daniel Neenan, Matthew Roberts

Agricultural and Biosystems Engineering Publications

At a recent training event to evaluate various types of rescue devices and strategies to extricate victims from partial entrapment in free-flowing grain, a group of volunteer high school students were invited to participate as test subjects. For each test, two youth were equipped with full-body harnesses and lifelines, asked to stand on the grain surface in a semi-trailer load of dry corn, and then allowed to be drawn into the grain as the bottom discharge gate under each youth was opened. Both “victims” were drawn into the grain at either end of the trailer at the same time, each ...


Canopy Chamber Measurements Of Carbon Dioxide Fluxes In Corn And Soybean Fields, Zhuangji Wang, Chenyi Luo, Thomas J. Sauer, Matthew J. Helmers, Liukang Xu, Robert Horton Jan 2018

Canopy Chamber Measurements Of Carbon Dioxide Fluxes In Corn And Soybean Fields, Zhuangji Wang, Chenyi Luo, Thomas J. Sauer, Matthew J. Helmers, Liukang Xu, Robert Horton

Agronomy Publications

Crop canopy CO2 exchange rate (CER) includes crop photosynthesis and soil/plant respiration. A portable canopy chamber is effective in determining crop CER values at a relatively small spatial (m2) scale. The objectives of this study were to use a canopy chamber to measure CO2 fluxes in corn (Zea mays L.) and soybean [Glycine max (L.) Merr.]. Chamber measurements were performed for 18 and 15 d in 2013 and 2014, respectively. The canopy chamber measures instantaneous CER fluxes, and daily and daytime cumulative CO2 values were calculated from the instantaneous CER. The chamber CER results were ...


Measuring The Influence Of Bedding On Soil Nitrogen Losses And Corn Crop Nitrogen Characteristics For Fall Applied Solid Beef Cattle Manure In Eastern South Dakota, Mukesh Mehata Jan 2018

Measuring The Influence Of Bedding On Soil Nitrogen Losses And Corn Crop Nitrogen Characteristics For Fall Applied Solid Beef Cattle Manure In Eastern South Dakota, Mukesh Mehata

Electronic Theses and Dissertations

Nitrogen (N) is a major component of chlorophyll which plays a key role in the photosynthesis process in crops. The N is one of the highest demanded nutrients by all plants for their growth and reproduction. Manure or inorganic fertilizer is often applied to fulfill the crops’ N demand. However, the applied N sources have the potential of N losses in different forms from the soil volume in many ways such as ammonia (NH3) volatilization, aerial nitrous oxide (N2O) loss, nitrate (NO3 --N) leaching, and runoff and/or erosion. Soil fertility, crop yield, water quality, and ...


Physio-Chemical And Functional Properties Of Nine Proso Millet Cultivars, Manjot Singh, Akinbode A. Adedeji, Dipak Santra Jan 2018

Physio-Chemical And Functional Properties Of Nine Proso Millet Cultivars, Manjot Singh, Akinbode A. Adedeji, Dipak Santra

Biosystems and Agricultural Engineering Faculty Publications

Evaluation of the postharvest properties of nine proso millet cultivars was carried out to determine their physical and engineering properties, which are very useful for designing appropriate systems for process operations such as sorting, drying, heating, cooling, and milling. Nine cultivars of proso millet comprising waxy and non-waxy types, namely Cope, Earlybird, Huntsman, Minco, Plateau, Sunrise, Rise, Dawn, and Panhandle, were obtained from the Panhandle Research and Extension Center, University of Nebraska, Scottsbluff. Results showed significant (p < 0.05) differences in their physical properties, such as sphericity, volume, bulk density, porosity, and angle of repose, which ranged from 0.86 to 0.91, from 3.94 to 5.14 mm3, from 765.49 to 809.67 kg m-3, from 42.49% to 44.20%, and from 22.98° to 25.74 ...


Stored Grain Pack Factor Measurements For Soybeans, Grain Sorghum, Oats, Barley, And Wheat, Rumela Bhadra, Mark E. Casada, Aaron P. Turner, Michael D. Montross, Sidney A. Thompson, Samuel G. Mcneill, Ronaldo G. Maghirang, Josephine M. Boac Jan 2018

Stored Grain Pack Factor Measurements For Soybeans, Grain Sorghum, Oats, Barley, And Wheat, Rumela Bhadra, Mark E. Casada, Aaron P. Turner, Michael D. Montross, Sidney A. Thompson, Samuel G. Mcneill, Ronaldo G. Maghirang, Josephine M. Boac

Biosystems and Agricultural Engineering Faculty Publications

Grain and oilseed crops stored in bins undergo compaction due to overbearing pressure of the grain inside the structure. Thus, volume measurements of grain in bins need to be combined with the amount of packing (usually called pack factor) in addition to the initial density so that the mass in the structure can be calculated. Multiple pack factor prediction methods are in use in the grain industry, but they have only been validated in the literature and compared with field data for corn and hard red winter wheat. Predictions from WPACKING, the program in ASABE Standard EP413.2, and two ...


Assessing Intra-Event Phosphorus Dynamics In Drainage Water Using Phosphate Stable Oxygen Isotopes, William Ford Iii, Mark R. Williams, Megan B. Young, Kevin W. King, Eric Fischer Jan 2018

Assessing Intra-Event Phosphorus Dynamics In Drainage Water Using Phosphate Stable Oxygen Isotopes, William Ford Iii, Mark R. Williams, Megan B. Young, Kevin W. King, Eric Fischer

Biosystems and Agricultural Engineering Faculty Publications

Quantifying fluxes and pathways of dissolved reactive phosphorus (DRP) in tile-drained landscapes has been hampered by a lack of measurements that are sensitive to P fate and transport processes. One potential tool to help understand these dynamics is the oxygen isotope signature of phosphate (δ18OPO4); however, its potential benefits and limitations are not well understood for intra-event dynamics at the field scale. The objectives of this study were to quantify intra-event variability of δ18OPO4 signatures in tile drainage water and assess the efficacy of δ18OPO4 to elucidate mechanisms and flow pathways ...


Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh Jan 2018

Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh

Electronic Theses and Dissertations

The Precision Agriculture plays a crucial part in the agricultural industry about improving the decision-making process. It aims to optimally allocate the resources to maintain the sustainable productivity of farmland and reduce the use of chemical compounds. [17] However, the on-site inspection of vegetations often falls to researchers’ trained eye and experience, when it deals with the identification of the non-crop vegetations. Deep Convolution Neural Network (CNN) can be deployed to mitigate the cost of manual classification. Although CNN outperforms the other traditional classifiers, such as Support Vector Machine, it is still in question whether CNN can be deployable in ...


A Quantitative Environmental Assessment Of Incorporating Torrefaction Into Farming Enterprises In Eastern South Dakota, Dinesh Fuyal Jan 2018

A Quantitative Environmental Assessment Of Incorporating Torrefaction Into Farming Enterprises In Eastern South Dakota, Dinesh Fuyal

Electronic Theses and Dissertations

The use of renewable energy sources has been increasing in the recent years due to population growth and environmental concerns. Biomass is a promising energy source that can be used to produce biofuels or torrefied pellets. Torrefied biomass may be used in power plants, industrial and residential heating, feedstocks for gasification, air and water filtrating, and soil amendment. The interest of torrefied pellets as energy sources for various applications has been increased in the recent years due to the concerns about energy security and environmental issues. This study focuses on the economic and environmental assessment of agricultural feedstocks like corn ...


Biomass Production And Composition Of Temperate And Tropical Maize In Central Iowa, Pedro Alexander Infante, Ken Moore, Charlie Hurburgh, Paul Scott, Sotirios Archontoulis, Andrew Lenssen, Shuizhang Fei Jan 2018

Biomass Production And Composition Of Temperate And Tropical Maize In Central Iowa, Pedro Alexander Infante, Ken Moore, Charlie Hurburgh, Paul Scott, Sotirios Archontoulis, Andrew Lenssen, Shuizhang Fei

Agronomy Publications

Bioethanol production in the midwestern U.S. has largely focused on maize (Zea mays L.) grain for starch-based ethanol production. There has been growing interest in lignocellulosic biomass as a feedstock for biofuels. Because maize adapted to the tropics does not initiate senescence as early as temperate-adapted maize, using a tropical germplasm could improve biomass yield. This study compares the suitability of temperate and tropical maize with differing relative maturities as feedstocks for bioethanol production. Field trials were established in central Iowa during the 2014 and 2015 growing seasons. Six hybrids of different relative maturities were grown at two levels ...


Maize And Soybean Root Front Velocity And Maximum Depth In Iowa, Usa, Raziel A. Ordonez, Michael J. Castellano, Jerry L. Hatfield, Matthew J. Helmers, Mark A. Licht, Matthew Liebman, Ranae Dietzel, Rafael Martinez-Feria, Javed Iqbal, Laila A. Puntel, S. Carolina Cordova, Kaitlin Togliatti, Emily E. Wright, Sotirios V. Archontoulis Jan 2018

Maize And Soybean Root Front Velocity And Maximum Depth In Iowa, Usa, Raziel A. Ordonez, Michael J. Castellano, Jerry L. Hatfield, Matthew J. Helmers, Mark A. Licht, Matthew Liebman, Ranae Dietzel, Rafael Martinez-Feria, Javed Iqbal, Laila A. Puntel, S. Carolina Cordova, Kaitlin Togliatti, Emily E. Wright, Sotirios V. Archontoulis

Agronomy Publications

Quantitative measurements of root traits can improve our understanding of how crops respond to soil and weather conditions, but such data are rare. Our objective was to quantify maximum root depth and root front velocity (RFV) for maize (Zea mays) and soybean (Glycine max) crops across a range of growing conditions in the Midwest USA. Two sets of root measurements were taken every 10–15 days: in the crop row (in-row) and between two crop rows (center-row) across six Iowa sites having different management practices such as planting dates and drainage systems, totaling 20 replicated experimental treatments. Temporal root data ...