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Department

OSU Extension

EXPERTS

  • Sergio Abit
    • Professor
    • Plant & Soil Sciences
    • ProfessorPlant & Soil Sciences
    • Extension Specialist for Onsite Wastewater Management
    • OSU Extension
    • Extension Specialist for Onsite Wastewater ManagementOSU Extension
    Dr. Abit earned a B.S. degree in Agriculture from the Visayas State University (VSU). He joined the Department of Agronomy and Soil Science at VSU in 2001 as member of its teaching faculty. Sergio then studied Soil Science at the North Carolina State University earning an M.S. in 2005 and Ph.D. in 2009. Dr. Abit also worked as research soil scientist for the USDA-ARS in Bowling Green, KY before joining the faculty in the Department of Plant and Soil Sciences at the Oklahoma State University in 2012. Dr. Abit focuses primarily in Soil Science teaching and is the Undergraduate Student Coordinator of the department. He is a member of the Environmental Science Program Steering Committee. He also serves as the State Specialist for Onsite Wastewater Treatment Systems wherein he leads efforts to provide continuing education opportunities for septic system professionals in Oklahoma.

    Research Interests:

    1. Sub-surface fates of dissolved pollutants (excess nitrogen and phosphorus)
    2. Impacts of soil amendments and hydrologic conditions on subsurface fates of pathogenic bacteria.
    2. Environmental impacts of surface and sub-surface application of effluent from onsite wastewater treatment systems
    Dr. Abit earned a B.S. degree in Agriculture from the Visayas State University (VSU). He joined the Department of Agronomy and Soil Science at VSU in 2001 as member of its teaching faculty. Sergio then studied Soil Science at the North Carolina State University earning an M.S. in 2005 and Ph.D. in 2009. Dr. Abit also worked as research soil scientist for the USDA-ARS in Bowling Green, KY before joining the faculty in the Department of Plant and Soil Sciences at the Oklahoma State University in 2012. Dr. Abit focuses primarily in Soil Science teaching and is the Undergraduate Student Coordinator of the department. He is a member of the Environmental Science Program Steering Committee. He also serves as the State Specialist for Onsite Wastewater Treatment Systems wherein he leads efforts to provide continuing education opportunities for septic system professionals in Oklahoma.

    Research Interests:

    1. Sub-surface fates of dissolved pollutants (excess nitrogen and phosphorus)
    2. Impacts of soil amendments and hydrologic conditions on subsurface fates of pathogenic bacteria.
    2. Environmental impacts of surface and sub-surface application of effluent from onsite wastewater treatment systems
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Filipino; Pilipino
    • Plant & Soil Sciences
    • OSU Extension
    Fields of Research
    • Agricultural, veterinary and food sciences
    • Agricultural and veterinary sciences
    • Biological sciences
    • Environmental sciences
  • Cathy Allen
    • Senior Extension Specialist
    • Agricultural Education, Communication & Leadership
    • Senior Extension SpecialistAgricultural Education, Communication & Leadership
    • Senior Extension Specialist
    • OSU Extension
    • Senior Extension SpecialistOSU Extension
    While Cathy Allen spent her childhood in the corn and soybean-laden fields of central Illinois, Oklahoma has become her true home away from home. First introduced to the state through her husband Kevin, a fellow Illinoisan turned cowboy, she has become connected to Oklahoma State University after career stops at the University of Illinois and the University of Missouri.

    At the age of 8, Cathy said the 4-H pledge at her first Raymond Sparklers 4-H club meeting and has never stopped. Her favorite 4-H project was You Learn to Bake. She has since created a recipe of combining her love of 4-H and healthy living that has continued through her 32-year career working as a 4-H Youth Development Professional.
    While Cathy Allen spent her childhood in the corn and soybean-laden fields of central Illinois, Oklahoma has become her true home away from home. First introduced to the state through her husband Kevin, a fellow Illinoisan turned cowboy, she has become connected to Oklahoma State University after career stops at the University of Illinois and the University of Missouri.

    At the age of 8, Cathy said the 4-H pledge at her first Raymond Sparklers 4-H club meeting and has never stopped. Her favorite 4-H project was You Learn to Bake. She has since created a recipe of combining her love of 4-H and healthy living that has continued through her 32-year career working as a 4-H Youth Development Professional.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Education, Communication & Leadership
    • OSU Extension
  • Lou Anella
    • Professor
    • Horticulture & Landscape Architecture
    • ProfessorHorticulture & Landscape Architecture
    • Director of the Botanic Garden
    • OSU Extension
    • Director of the Botanic GardenOSU Extension
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Horticulture & Landscape Architecture
    • OSU Extension
    Fields of Research
    • Horticultural production
  • Brian Arnall
    • Professor
    • Plant & Soil Sciences
    • ProfessorPlant & Soil Sciences
    • Extension Specialist for Precision Nutrient Management
    • OSU Extension
    • Extension Specialist for Precision Nutrient ManagementOSU Extension
    Dr. Brian Arnall is a precision nutrient management extension specialist for Oklahoma State University. Dr. Arnall's extension, teaching, and research efforts are focused on precision technologies and nutrient management in all of Oklahoma's cropping systems with an emphasis in site specific techniques. He works closely with extension educators and industry personnel to improve nutrient management practices that will lead to increased profitability of producers. Dr. Arnall has been involved in sensor based technologies, remote sensing and variable rate application for more than ten years. Brian has more than 50 refereed journal pubs, more than 50 successful grants with total funds exceeding $2.5 million for his project. He has given 600+ talks in 7 countries. His program has produced 35 apps across iOS and Andriod platforms. His work focuses on providing information and tools to producers that will lead to improved nutrient management practices and increased profitability of Oklahoma production agriculture. Dr. Arnall received his doctorate in soil science from Oklahoma State University in 2008. He has served as an extension specialist since the completion of his studies. He teaches courses on Soil Nutrient Management and Precision Ag at Oklahoma State.
    Dr. Brian Arnall is a precision nutrient management extension specialist for Oklahoma State University. Dr. Arnall's extension, teaching, and research efforts are focused on precision technologies and nutrient management in all of Oklahoma's cropping systems with an emphasis in site specific techniques. He works closely with extension educators and industry personnel to improve nutrient management practices that will lead to increased profitability of producers. Dr. Arnall has been involved in sensor based technologies, remote sensing and variable rate application for more than ten years. Brian has more than 50 refereed journal pubs, more than 50 successful grants with total funds exceeding $2.5 million for his project. He has given 600+ talks in 7 countries. His program has produced 35 apps across iOS and Andriod platforms. His work focuses on providing information and tools to producers that will lead to improved nutrient management practices and increased profitability of Oklahoma production agriculture. Dr. Arnall received his doctorate in soil science from Oklahoma State University in 2008. He has served as an extension specialist since the completion of his studies. He teaches courses on Soil Nutrient Management and Precision Ag at Oklahoma State.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Plant & Soil Sciences
    • OSU Extension
    Fields of Research
    • Soil sciences
    • Crop and pasture production
    • Crop and pasture nutrition
    • Photogrammetry and remote sensing
    • Fertility
    • Fertilisers
  • Suzette Barta
    Suzette Barta, Ph.D. is the Coordinator for Community Engagement and Extension in the College of Education and Human Sciences. She is part of the Extension, Engagement, and Continuing Education Unit.

    Research Interests:

    Community Engagement, Service Learning, Community Engaged Research, Volunteer Management, Volunteer Recruitment
    Suzette Barta, Ph.D. is the Coordinator for Community Engagement and Extension in the College of Education and Human Sciences. She is part of the Extension, Engagement, and Continuing Education Unit.

    Research Interests:

    Community Engagement, Service Learning, Community Engaged Research, Volunteer Management, Volunteer Recruitment
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Collaborative projects
    • Speaking engagements
    • Membership of an advisory committee
    • Technical support
    • Agricultural Economics
    • OSU Extension
  • Paul Beck
    • Professor
    • Animal & Food Sciences
    • ProfessorAnimal & Food Sciences
    • Extension Specialist for Beef Nutrition
    • OSU Extension
    • Extension Specialist for Beef NutritionOSU Extension
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Animal & Food Sciences
    • OSU Extension
    Fields of Research
    • Agricultural, veterinary and food sciences
    • Agricultural and veterinary sciences
    • Animal production
    • Biological sciences
    • Crop and pasture production
    • Environmental sciences
  • Steve Beck
    • Assistant Director of OSU Extension
    • OSU Extension
    • Assistant Director of OSU ExtensionOSU Extension
    • State Program Leader for 4-H
    • OSU Extension
    • State Program Leader for 4-HOSU Extension
    Steve Beck is State Program Leader for 4-H and Assistant Director of OSU Extension. Dr. Beck returned to OSU following nearly five years as the 4-H Youth Development department head at New Mexico State University. Before he went out of state, he spent 10 years as a County Educator in Harper and Kingfisher counties, and another seven years as a State Specialist in Oklahoma 4-H administration.
    Steve Beck is State Program Leader for 4-H and Assistant Director of OSU Extension. Dr. Beck returned to OSU following nearly five years as the 4-H Youth Development department head at New Mexico State University. Before he went out of state, he spent 10 years as a County Educator in Harper and Kingfisher counties, and another seven years as a State Specialist in Oklahoma 4-H administration.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Education, Communication & Leadership
    • OSU Extension
  • Rosslyn Biggs
    • Associate Professor
    • Veterinary Clinical Sciences
    • Associate ProfessorVeterinary Clinical Sciences
    • Beef Cattle Extension Specialist
    • OSU Extension
    • Beef Cattle Extension SpecialistOSU Extension
    • Director of Continuing Education
    • OSU Extension
    • Director of Continuing EducationOSU Extension
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Veterinary Clinical Sciences
    • OSU Extension
  • Courtney Bir
    • Associate Professor
    • Agricultural Economics
    • Associate ProfessorAgricultural Economics
    • Extension Specialist for Farm Management
    • OSU Extension
    • Extension Specialist for Farm ManagementOSU Extension

    At OSU since 2020 with a focus on farm management and agricultural finance.

    Research Interests:

    Bir's research focuses on farmer and rancher decision making related to production possibilities and finances. By eliciting consumer preferences for agricultural products, and analyzing the potential for farmers to incorporate these preferences profitably, Bir is working to bridge the gap between consumer preferences and farmer possibilities. Additionally, she is working towards increasing producer use and awareness of farm financial planning in the state of Oklahoma.

    At OSU since 2020 with a focus on farm management and agricultural finance.

    Research Interests:

    Bir's research focuses on farmer and rancher decision making related to production possibilities and finances. By eliciting consumer preferences for agricultural products, and analyzing the potential for farmers to incorporate these preferences profitably, Bir is working to bridge the gap between consumer preferences and farmer possibilities. Additionally, she is working towards increasing producer use and awareness of farm financial planning in the state of Oklahoma.

    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Collaborative projects
    • Industry projects
    • Media inquiries
    • Masters or PhD research supervision
    • Speaking engagements
    • Undergraduate research supervision
    • Agricultural Economics
    • OSU Extension
    Fields of Research
    • Agricultural economics
    • Farm management, rural management and agribusiness
    • Zoology
    • Environmental sciences
    • Animal production
    • Environmental science and management
    • Food sciences
    • Veterinary sciences
  • Edmond Bonjour
    • Senior Extension Specialist
    • OSU Extension
    • Senior Extension SpecialistOSU Extension
    • Extension Specialist for Stored Grain Entomology
    • Entomology & Plant Pathology
    • Extension Specialist for Stored Grain EntomologyEntomology & Plant Pathology
    • Director, Oklahoma Agricultural Leadership Program
    • OSU Extension
    • Director, Oklahoma Agricultural Leadership ProgramOSU Extension

    I am the Director of the Oklahoma Agricultural Leadership Program for the Oklahoma Cooperative Extension Service and a Senior Extension Specialist for Stored Products in the Department of Entomology and Plant Pathology at Oklahoma State University.

    I am the Director of the Oklahoma Agricultural Leadership Program for the Oklahoma Cooperative Extension Service and a Senior Extension Specialist for Stored Products in the Department of Entomology and Plant Pathology at Oklahoma State University.

    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Entomology & Plant Pathology
    • OSU Extension
    Fields of Research
    • Zoology
    • Crop and pasture production
    • Ecological applications
  • Jonathan A Cammack
    • Assistant Professor
    • Entomology & Plant Pathology
    • Assistant ProfessorEntomology & Plant Pathology
    • Extension Specialist for Livestock Entomology and Parasitology
    • OSU Extension
    • Extension Specialist for Livestock Entomology and ParasitologyOSU Extension

    Dr. Jonathan A. Cammack is an Assistant Professor in the Department of Entomology and Plant Pathology, and the State Extension Specialist for Livestock Entomology and Parasitology with the Oklahoma Cooperative Extension Service. He teaches undergraduate courses in livestock entomology and forensic entomology.


    Research Interests:

    • Management of Livestock Pests
    • Sustainable Agriculture
    • Waste Management
    • Decomposition Ecology
    • Forensic Entomology
    • Insects as Alternative Protein Sources for Livestock Feed

    Dr. Jonathan A. Cammack is an Assistant Professor in the Department of Entomology and Plant Pathology, and the State Extension Specialist for Livestock Entomology and Parasitology with the Oklahoma Cooperative Extension Service. He teaches undergraduate courses in livestock entomology and forensic entomology.


    Research Interests:

    • Management of Livestock Pests
    • Sustainable Agriculture
    • Waste Management
    • Decomposition Ecology
    • Forensic Entomology
    • Insects as Alternative Protein Sources for Livestock Feed
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Entomology & Plant Pathology
    • OSU Extension
  • Justin Crosswhite
    • Teaching Instructor
    • Animal & Food Sciences
    • Teaching InstructorAnimal & Food Sciences
    Justin Crosswhite is the Youth Livestock Extension Specialist for the State of Oklahoma. Justin is an assistant extension specialist within the Department of Animal and Food Sciences at Oklahoma State University. Justin earned a bachelor's degree and Master of Science degree from Oklahoma State University and the University of Florida, respectively.

    Justin's extension program focuses on training educators, volunteers, and youth on production livestock practices, livestock judging, and being advocates for the meat animal industries. Justin also interacts with multiple undergraduate students as an academic advisor and advisor of the Oklahoma State University Block and Bridle club.

    Justin and his wife Dr. Mellissa Crosswhite live in the greater Stillwater area.
    Justin Crosswhite is the Youth Livestock Extension Specialist for the State of Oklahoma. Justin is an assistant extension specialist within the Department of Animal and Food Sciences at Oklahoma State University. Justin earned a bachelor's degree and Master of Science degree from Oklahoma State University and the University of Florida, respectively.

    Justin's extension program focuses on training educators, volunteers, and youth on production livestock practices, livestock judging, and being advocates for the meat animal industries. Justin also interacts with multiple undergraduate students as an academic advisor and advisor of the Oklahoma State University Block and Bridle club.

    Justin and his wife Dr. Mellissa Crosswhite live in the greater Stillwater area.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Animal & Food Sciences
    • OSU Extension
  • Amanda De Oliveira Silva
    • Associate Professor
    • Plant & Soil Sciences
    • Associate ProfessorPlant & Soil Sciences
    • Extension Specialist for Small Grains
    • OSU Extension
    • Extension Specialist for Small GrainsOSU Extension
    I have served as an Assistant Professor and Small Grains Extension Specialist at Oklahoma State University since August 2019. I believe that close interaction with producers is vital to understand their production strategies and to establish realistic research goals. My program focuses on developing science-based information to improve the agronomic and economic viability of small grains production in Oklahoma and in the Southern Great Plains.

    I coordinate the Small Grains Variety Performance trials in Oklahoma. I also conduct an applied Research and Extension program, which uses information on crop physiology and plant nutrient requirements during the growing season to improve wheat variety characterization and crop management strategies, maximizing yield and while maintaining environmental stewardship.

    Research Interests:

    Crop Physiology, Plant Nutrition, Wheat Management, Impact of Genotype x Environment x Management interaction on wheat yield, end-use quality and nitrogen use efficiency.
    I have served as an Assistant Professor and Small Grains Extension Specialist at Oklahoma State University since August 2019. I believe that close interaction with producers is vital to understand their production strategies and to establish realistic research goals. My program focuses on developing science-based information to improve the agronomic and economic viability of small grains production in Oklahoma and in the Southern Great Plains.

    I coordinate the Small Grains Variety Performance trials in Oklahoma. I also conduct an applied Research and Extension program, which uses information on crop physiology and plant nutrient requirements during the growing season to improve wheat variety characterization and crop management strategies, maximizing yield and while maintaining environmental stewardship.

    Research Interests:

    Crop Physiology, Plant Nutrition, Wheat Management, Impact of Genotype x Environment x Management interaction on wheat yield, end-use quality and nitrogen use efficiency.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Collaborative projects
    • Masters or PhD research supervision
    • Mentoring (short-term)
    • Career advice
    • Mentoring (long-term)
    • Speaking engagements
    • Membership of an advisory committee
    • Portuguese
    • Spanish - Latin American
    • Plant & Soil Sciences
    • OSU Extension
    Fields of Research
    • Agronomy
    • Agricultural management of nutrients
    • Crop and pasture production
  • Courtney Dekalb-Myers
    • Assistant Extension Specialist
    • Horticulture & Landscape Architecture
    • Assistant Extension SpecialistHorticulture & Landscape Architecture
    • Extension Specialist for Consumer Horticulture
    • OSU Extension
    • Extension Specialist for Consumer HorticultureOSU Extension

    100% Extension appointment in consumer horticulture. Courtney's focus is in home horticulture, including landscape ornamentals and vegetable gardens. She leads the effort for developing a statewide resource center for Oklahoma gardeners. Through her position, she also supports county educators with their horticulture programming.

    100% Extension appointment in consumer horticulture. Courtney's focus is in home horticulture, including landscape ornamentals and vegetable gardens. She leads the effort for developing a statewide resource center for Oklahoma gardeners. Through her position, she also supports county educators with their horticulture programming.

    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Horticulture & Landscape Architecture
    • OSU Extension
  • Cheryl DeVuyst
    • Professor
    • Agricultural Economics
    • ProfessorAgricultural Economics
    • Extension Specialist for Agriculture Marketing
    • OSU Extension
    • Extension Specialist for Agriculture MarketingOSU Extension
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Economics
    • OSU Extension
    Fields of Research
    • Agricultural economics
    • Applied economics
  • Eric DeVuyst
    • Professor
    • Agricultural Economics
    • ProfessorAgricultural Economics
    • Extension Specialist for Farm and Ranch Management
    • OSU Extension
    • Extension Specialist for Farm and Ranch ManagementOSU Extension
    BS Food Systems Management and Economics, Michigan State University
    MS Agricultural Economics, Michigan State University
    PhD Agricultural Economics, Purdue University
    MA Theological Studies, Liberty University

    Research Interests:

    Beef cattle production economics
    Crop economics
    Mathematical programming
    Risk modeling
    BS Food Systems Management and Economics, Michigan State University
    MS Agricultural Economics, Michigan State University
    PhD Agricultural Economics, Purdue University
    MA Theological Studies, Liberty University

    Research Interests:

    Beef cattle production economics
    Crop economics
    Mathematical programming
    Risk modeling
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Economics
    • OSU Extension
    Fields of Research
    • Agriculture, land and farm management
    • Agricultural production systems simulation
    • Farm management, rural management and agribusiness
  • Head
    Damona Doye
    • Associate Vice President, Oklahoma Cooperative Extension Service
    • OSU Extension
    • Associate Vice President, Oklahoma Cooperative Extension ServiceOSU Extension
    • Regents Professor
    • Agricultural Economics
    • Regents ProfessorAgricultural Economics
    An Oklahoma State University faculty member since June 1986, Lawton native Damona Doye was named associate vice president of OSU Extension in January 2018. OSU Extension is a state agency, with educators and staff in all 77 counties as well as state, district and area specialists who help Oklahomans solve local and regional issues and concerns. Prior to being named associate vice president, Doye served as OSU Extension farm management specialist for 32 years and held the Rainbolt Chair of Agricultural Finance in the Department of Agricultural Economics. She is a Fellow of the Agricultural and Applied Economics Association, the highest honor given by the organization in recognition of lifetime achievement.

    Research Interests:

    Production economics, farm management, farm information systems, land values, rental and custom rates, technology adoption
    An Oklahoma State University faculty member since June 1986, Lawton native Damona Doye was named associate vice president of OSU Extension in January 2018. OSU Extension is a state agency, with educators and staff in all 77 counties as well as state, district and area specialists who help Oklahomans solve local and regional issues and concerns. Prior to being named associate vice president, Doye served as OSU Extension farm management specialist for 32 years and held the Rainbolt Chair of Agricultural Finance in the Department of Agricultural Economics. She is a Fellow of the Agricultural and Applied Economics Association, the highest honor given by the organization in recognition of lifetime achievement.

    Research Interests:

    Production economics, farm management, farm information systems, land values, rental and custom rates, technology adoption
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Economics
    • OSU Extension
    Fields of Research
    • Agricultural economics
    • Agriculture, land and farm management
    • Farm management, rural management and agribusiness
  • Nurhan Dunford
    • Professor
    • Robert M. Kerr Food & Agricultural Products Center
    • ProfessorRobert M. Kerr Food & Agricultural Products Center
    • Extension Specialist for Oilseed Chemistry
    • OSU Extension
    • Extension Specialist for Oilseed ChemistryOSU Extension
    My research program focuses on value-added processing of underutilized plant materials, sustainable process development and optimization, waste minimization, biological wastewater treatment, vegetable oil quality, oil and oilseed processing, functional foods, nutraceuticals and conversion of biomass to renewable products and biofuels.
    My research program focuses on value-added processing of underutilized plant materials, sustainable process development and optimization, waste minimization, biological wastewater treatment, vegetable oil quality, oil and oilseed processing, functional foods, nutraceuticals and conversion of biomass to renewable products and biofuels.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Turkish
    • English
    • German
    • Biosystems & Agricultural Engineering
    • Robert M. Kerr Food & Agricultural Products Center
    • Biobased Products & Energy Center
    • OSU Extension
    • Food Science
    Fields of Research
    • Engineering
    • Agricultural, veterinary and food sciences
    • Agricultural and veterinary sciences
    • Chemical engineering
    • Food sciences
    • Nutrition and dietetics
  • Aaron Essary
    • Extension Specialist for Viticulture & Enology
    • OSU Extension
    • Extension Specialist for Viticulture & EnologyOSU Extension
    Assistant Extension Specialist for Viticulture & Enology at Oklahoma State University, Ferguson College of Agriculture, Department of Horticulture & Landscape Architecture. My work focuses on helping the Oklahoma Wine Industry.
    Assistant Extension Specialist for Viticulture & Enology at Oklahoma State University, Ferguson College of Agriculture, Department of Horticulture & Landscape Architecture. My work focuses on helping the Oklahoma Wine Industry.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Horticulture & Landscape Architecture
    • OSU Extension
  • Christi Evans
    • Assistant Extension Specialist
    • Nutritional Sciences
    • Assistant Extension SpecialistNutritional Sciences

    Christi Evans is an Assistant State Extension Specialist for Food Safety at Oklahoma State University. She is a registered dietitian and is passionate about food safety, reducing food waste, and home food preservation. Evans also hosts cooking segments for Oklahoma Gardening, sharing practical tips and health-focused recipes.

    Christi Evans is an Assistant State Extension Specialist for Food Safety at Oklahoma State University. She is a registered dietitian and is passionate about food safety, reducing food waste, and home food preservation. Evans also hosts cooking segments for Oklahoma Gardening, sharing practical tips and health-focused recipes.

    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • OSU Extension
    • Nutritional Sciences
    Fields of Research
    • Nutritional science
  • Scott Frazier
    • Associate Professor
    • Biosystems & Agricultural Engineering
    • Associate ProfessorBiosystems & Agricultural Engineering
    • Extension Specialist for Energy Management
    • OSU Extension
    • Extension Specialist for Energy ManagementOSU Extension

    Dr. Frazier joined the department in June 2008 and currently has a teaching and extension appointment. He comes from the OSU Industrial Engineering Department where he was a visiting assistant professor teaching both upper division and graduate-level IEM courses. He was also the Assistant Director of the OSU Industrial Assessment Center. His Extension, Teaching and Applied Research focus on energy and resource management in the agricultural and commercial/industrial sector. He is involved in extension activities that educate stakeholders in residential and commercial energy usage, biofuel technologies and sustainability. A major focus since 2015 has been the energy and water delivery efficiency of irrigation systems in Oklahoma. In conjunction with resource management he conducts Life Cycle Assessment studies to determine the sustainability of various ag-processes and products. He also teaches university classes on engineering fundamentals and energy systems.

    Research Interests:

    Energy Management
    Renewable Energy Systems
    Life Cycle Assessment
    Irrigation Efficiency
    Decision Science

    Dr. Frazier joined the department in June 2008 and currently has a teaching and extension appointment. He comes from the OSU Industrial Engineering Department where he was a visiting assistant professor teaching both upper division and graduate-level IEM courses. He was also the Assistant Director of the OSU Industrial Assessment Center. His Extension, Teaching and Applied Research focus on energy and resource management in the agricultural and commercial/industrial sector. He is involved in extension activities that educate stakeholders in residential and commercial energy usage, biofuel technologies and sustainability. A major focus since 2015 has been the energy and water delivery efficiency of irrigation systems in Oklahoma. In conjunction with resource management he conducts Life Cycle Assessment studies to determine the sustainability of various ag-processes and products. He also teaches university classes on engineering fundamentals and energy systems.

    Research Interests:

    Energy Management
    Renewable Energy Systems
    Life Cycle Assessment
    Irrigation Efficiency
    Decision Science

    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Spanish - Latin American
    • Biosystems & Agricultural Engineering
    • Biobased Products & Energy Center
    • OSU Extension
    Fields of Research
    • Engineering
    • Mechanical engineering
  • Laura Goodman
    • Associate Professor
    • Natural Resource Ecology & Management
    • Associate ProfessorNatural Resource Ecology & Management
    • Extension Specialist for Rangeland Ecology
    • OSU Extension
    • Extension Specialist for Rangeland EcologyOSU Extension
    My research interests include identifying mechanisms that determine where and what domesticated ungulates graze. I am specifically interested in individual behavioral differences that are consistent in multiple contexts and limit an animals' ability to adapt in varying environments. The effects of differences in personality on grazing distribution, dam reproductive efficiency, and offspring performance are also areas where I focus because of their ecological and economic importance. I also research methods to manipulating which plant species are grazed (targeted grazing) through specific supplements, grazing systems, species selection (cattle, goat, sheep), and management techniques. My goal is to help livestock producers select animals whose behaviors fit best with management objectives.
    My research interests include identifying mechanisms that determine where and what domesticated ungulates graze. I am specifically interested in individual behavioral differences that are consistent in multiple contexts and limit an animals' ability to adapt in varying environments. The effects of differences in personality on grazing distribution, dam reproductive efficiency, and offspring performance are also areas where I focus because of their ecological and economic importance. I also research methods to manipulating which plant species are grazed (targeted grazing) through specific supplements, grazing systems, species selection (cattle, goat, sheep), and management techniques. My goal is to help livestock producers select animals whose behaviors fit best with management objectives.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Natural Resource Ecology & Management
    • OSU Extension
    Fields of Research
    • Biological sciences
  • Amy Hagerman
    • Associate Professor
    • Agricultural Economics
    • Associate ProfessorAgricultural Economics
    • Extension Specialist for Agriculture and Food Policy
    • OSU Extension
    • Extension Specialist for Agriculture and Food PolicyOSU Extension
    Dr. Hagerman is a native of Oklahoma and an OSU alumni. She earned graduate degrees in Agricultural Economics from Texas A&M University. Prior to returning to OSU in 2018, she worked for 7 years with the United States Department of Agriculture. Currently, she is an Associate Professor and a State Extension Specialist in Agricultural and Food Policy. Dr. Hagerman's Extension program focuses on improving the public's understanding of federal and state policies, and assisting in farm and ranch risk management and resilience to adverse events. Her research activities include policy analysis; extreme event consequence assessments; regional and national market dynamics; and health economics.

    Research Interests:

    Animal Health
    Disaster Preparedness and Response
    Farm Policy
    Risk Management
    Dr. Hagerman is a native of Oklahoma and an OSU alumni. She earned graduate degrees in Agricultural Economics from Texas A&M University. Prior to returning to OSU in 2018, she worked for 7 years with the United States Department of Agriculture. Currently, she is an Associate Professor and a State Extension Specialist in Agricultural and Food Policy. Dr. Hagerman's Extension program focuses on improving the public's understanding of federal and state policies, and assisting in farm and ranch risk management and resilience to adverse events. Her research activities include policy analysis; extreme event consequence assessments; regional and national market dynamics; and health economics.

    Research Interests:

    Animal Health
    Disaster Preparedness and Response
    Farm Policy
    Risk Management
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Agricultural Economics
    • OSU Extension
    Fields of Research
    • Animal production not elsewhere classified
    • Agricultural economics
    • Health economics
    • Policy and administration
  • Beatrix Haggard
    • Professor
    • Plant & Soil Sciences
    • ProfessorPlant & Soil Sciences
    • Extension Specialist for Plant and Soil Sciences Educator Training
    • OSU Extension
    • Extension Specialist for Plant and Soil Sciences Educator TrainingOSU Extension
    Dr. Haggard earned her B.S. degree in Agronomy and Range Management from Tarleton State University in 2008. She then moved to Louisiana State University where she earned her Ph.D. in Agronomy in 2012. Dr. Haggard worked for LSU AgCenter from 2012-2015 as the Upland Row Crop Soil Fertility Specialist, before accepting a faculty position in the Department of Plant and Soil Sciences at Oklahoma State University. Dr. Haggard focuses on Plant Science teaching and Undergraduate Coordinating. She also has 4-H and FFA Youth Development extension responsibilities.
    Dr. Haggard earned her B.S. degree in Agronomy and Range Management from Tarleton State University in 2008. She then moved to Louisiana State University where she earned her Ph.D. in Agronomy in 2012. Dr. Haggard worked for LSU AgCenter from 2012-2015 as the Upland Row Crop Soil Fertility Specialist, before accepting a faculty position in the Department of Plant and Soil Sciences at Oklahoma State University. Dr. Haggard focuses on Plant Science teaching and Undergraduate Coordinating. She also has 4-H and FFA Youth Development extension responsibilities.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Plant & Soil Sciences
    • OSU Extension
    Fields of Research
    • Agricultural, veterinary and food sciences
    • Agricultural and veterinary sciences
    • Biological sciences
    • Crop and pasture production
    • Environmental sciences
  • Douglas Hamilton
    • Associate Professor
    • Biosystems & Agricultural Engineering
    • Associate ProfessorBiosystems & Agricultural Engineering
    • Extension Specialist for Waste Management
    • OSU Extension
    • Extension Specialist for Waste ManagementOSU Extension
    I am an Associate Professor of Biosystems Engineering and Extension Waste Management Specialist.

    The mission of extension is to bring the land grant university to the people. True, the extension service delivers unbiased, scientifically-sound research information outside of the university classroom, but extension also serves as a conduit bringing real-life, researchable questions back to the laboratory. As an engineer, my role is to seek out problems at the intersection of agricultural production and environmental preservation and solve them through educational programs and applied research.

    I have worked for Oklahoma State University and the Oklahoma Cooperative Extension Service since 1995. I mostly work in manure handling and treatment, but deal with all types of organic materials. My three program areas are material properties and handling, systems management (including safety and regulation), and treatment.

    Before coming to Oklahoma, I was the Soil and Water Extension Specialist for the Tennessee Agricultural Extension Service. Many years ago, I also worked as an engineer at the pollution control agency for the State of Arkansas. I earned all my degrees in Agricultural Engineering from the University of Arkansas, Iowa State University, and Penn State University. I also graduated from the world's most famous high school – Little Rock Central.

    Research Interests:

    I conduct applied research in organic waste treatment and nutrient recycling.

    For nearly four decades I have worked on anaerobic digestion of liquids and slurries. The focus on my most recent efforts has been development of the Anaerobic Sequencing Batch Reactor (ASBR) for treatment of low-solids liquids. An ASBR digester is able to treat organic liquids with a very small hydraulic detention time, which greatly reduces reactor size. I also contributed to the understanding and standardization of facultative lagoons for agricultural waste treatment.

    I also work with composting and vermicomposting to treat solid waste materials. I have developed process parameters to treat food wastes, poultry litter, and poultry mortality compost using earth worms. Early in my career at Oklahoma State I developed an easy to operate composting system for horse owners.
    I am an Associate Professor of Biosystems Engineering and Extension Waste Management Specialist.

    The mission of extension is to bring the land grant university to the people. True, the extension service delivers unbiased, scientifically-sound research information outside of the university classroom, but extension also serves as a conduit bringing real-life, researchable questions back to the laboratory. As an engineer, my role is to seek out problems at the intersection of agricultural production and environmental preservation and solve them through educational programs and applied research.

    I have worked for Oklahoma State University and the Oklahoma Cooperative Extension Service since 1995. I mostly work in manure handling and treatment, but deal with all types of organic materials. My three program areas are material properties and handling, systems management (including safety and regulation), and treatment.

    Before coming to Oklahoma, I was the Soil and Water Extension Specialist for the Tennessee Agricultural Extension Service. Many years ago, I also worked as an engineer at the pollution control agency for the State of Arkansas. I earned all my degrees in Agricultural Engineering from the University of Arkansas, Iowa State University, and Penn State University. I also graduated from the world's most famous high school – Little Rock Central.

    Research Interests:

    I conduct applied research in organic waste treatment and nutrient recycling.

    For nearly four decades I have worked on anaerobic digestion of liquids and slurries. The focus on my most recent efforts has been development of the Anaerobic Sequencing Batch Reactor (ASBR) for treatment of low-solids liquids. An ASBR digester is able to treat organic liquids with a very small hydraulic detention time, which greatly reduces reactor size. I also contributed to the understanding and standardization of facultative lagoons for agricultural waste treatment.

    I also work with composting and vermicomposting to treat solid waste materials. I have developed process parameters to treat food wastes, poultry litter, and poultry mortality compost using earth worms. Early in my career at Oklahoma State I developed an easy to operate composting system for horse owners.
    • Faculty/Staff
    • Oklahoma State University - Stillwater
    • Collaborative projects
    • Industry projects
    • Speaking engagements
    • Masters or PhD research supervision
    • Media inquiries
    • English
    • Spanish; Castilian
    • Biosystems & Agricultural Engineering
    • OSU Extension
    Fields of Research
    • Environmental engineering
    • Waste management, reduction, reuse and recycling
    • Wastewater treatment processes
    • Agricultural engineering

Department contact

  • 405-744-5398
  • 202 Agricultural Hall, Stillwater, Oklahoma, 74078, United States

External links

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