• Distinguished Professor of Environmental and Resource Economics and Public Policy;
  • Director, Program on Coupled Human and Earth Systems (PCHES);
  • President, Association of Environmental and Resource Economists (AERE)

Areas of Expertise

  • Economy-wide modeling
  • Climate change impacts and adaptation
  • Integrated assessment
  • Publius Vergilius Maro Professor of Entomology
  • Director, Center for Pollinator Research, Insect Biodiversity Center

Areas of Expertise

  • Bees
  • Genomics, Immunity, Behavior, Physiology, Ecology
  • Decision Support Tools
  • Technology for Identification and Monitoring of Insects
  • Associate Director of Partnerships & Engagement

Areas of Expertise

  • Environmental Law
  • Non-Point Source Pollution of Water (Agriculture and Urban Stormwater Runoff)
  • Stakeholder Engagement at Local, State, Regional, and Federal Levels
  • Department Head, Ag Economics, Sociology, and Education
  • Professor of Agricultural, Environmental and Regional Economics and Demography

Areas of Expertise

  • Economic and environmental sustainability of agriculture
  • Global food and agricultural markets
  • Natural resource economics
  • Climate change adaptation and mitigation
  • Professor of Entomology

Areas of Expertise

  • Soil Entomology and Ecology
  • Sustainable and Organic Agriculture
  • Insect Pathology
  • Women and Gender in Science
  • Women and Agriculture
  • Associate Research Professor
  • Extension Veterinarian

Areas of Expertise

  • Transition cow management
  • Dairy cattle reproduction
  • Farm personnel training and performance
  • Dairy production medicine
  • Cow comfort
  • Professor, Department of Ecosystem Science & Management
  • Co-hire, Institutes of Energy & the Environment
  • Professor of Rural Sociology

Areas of Expertise

  • Environmental Governance Systems
  • Energy and Society
  • Community Development and Stakeholder Engagement
  • Water Quality
  • Women in Agriculture
  • Associate Professor

Areas of Expertise

  • Environmental Economics
  • Water Resource Economics
  • Nonmarket Valuation
  • Behavioral Economics
  • Policy Analysis
  • Stormwater and Green Infrastructure
  • Transportation Economics
  • Professor of Wildlife Resources
  • Extension Wildlife Specialist

Areas of Expertise

  • Avian ecology
  • Effects of shale gas development on forests and birds
  • forest songbirds
  • Human impacts on bird population
  • Wildlife habitat management on private lands
  • Landscaping for birds and wildlife
  • Professor of Soil Microbiology and Biogeochemistry

Areas of Expertise

  • Soil microbiology
  • Nitrogen cycle
  • Soil quality
  • Ecological restoration
  • Biogeochemistry
  • Professor of Bacterial Systematics and Plant Pathology

Areas of Expertise

  • Phytobacteriology
  • Translational Taxonomy
  • Systematic Bacteriology
  • Biological Control
  • Sustainable and Organic Agriculture
  • Assistant Professor

Areas of Expertise

  • Evolutionary ecology of legumes and rhizobia
  • Plant-microbe-climate interactions
  • Mutualism evolution
  • Bio-inoculants and leguminous cover crops
  • Biological nitrogen Fixation
  • Genome-wide association studies (GWAS)
  • Evolve and resequence
  • Assistant Professor of Rural Sociology
  • Research Associate, Rock Ethics Institute

Areas of Expertise

  • Environmental sociology
  • Food and agricultural ethics
  • Science, knowledge, and technology
  • Culture and consumption
  • Social psychology
  • Animals and society
  • Qualitative research methods
  • Associate Research Professor
  • Director, Southeast Agricultural Research & Extension Center

Areas of Expertise

  • Corn Disease
  • Soybean Disease
  • Wheat Disease
  • Hemp Production
  • Field Crops Disease Management
  • Professor and Department Head of Plant Science

Areas of Expertise

  • Plant mineral nutrition
  • Micronutrient transport
  • Molecular mechanisms of iron transport
  • Assistant Professor of Soils and Environmental Microbiology
  • Assistant Professor of Soilborne Disease Dynamics and Management

Areas of Expertise

  • Fungal ecology and evolution
  • Soil & plant microbiome response to stress
  • Biological management of fungal & oomycete pathogens
  • Soil health and disease modeling
  • Associate Professor of Dairy Cattle Genetics
  • Undergraduate Adviser, Dairy, Genetics
  • Associate Professor of Vegetable Crop Science

Areas of Expertise

  • Sustainable vegetable production systems
  • Plant nutrition, soil fertility and irrigation management
  • Alternatives to chemical soil fumigation
  • Vegetable response to abiotic stress
  • Vegetable quality
  • Agrobiodiversity and novel vegetable products
  • Agronomic biofortification
  • Assistant Professor of Phytobiomes

Areas of Expertise

  • Microbial community ecology
  • Plant-microbe interaction
  • Environmental microbiology
  • Soil microbiology
  • Ecological resilience and resistance
  • Causes and consequences of biodiversity
  • Professor of Pedology & Graduate Program Chair

Areas of Expertise

  • Soil Science
  • Watershed Management
  • Landscape Ecology
  • Natural Resource Management
  • Professor of Soil Management and Applied Soil Physics

Areas of Expertise

  • No-tillage
  • Cover crops
  • Soil compaction
  • Soil health
  • Soil erosion
  • Soil conservation
  • Nitrogen fixation
  • Associate Professor of Hydrology

Areas of Expertise

  • Ecohydrology
  • Hydrology
  • Biogeochemistry
  • Terrain Analysis
  • Water Quality
  • Watershed Management
  • Professor of Woody Plant Physiology

Areas of Expertise

  • Root biology and ecology
  • Mycorrhizal ecology
  • Plant Physiological Ecology
  • Plant Ecology
  • Global Change Biology
  • Belowground Ecology
  • Fruit tree physiology
  • Professor Emeritus

Areas of Expertise

  • Fate And Control Of Pollutants In Soils And Water
  • Land-based recycling of effluents and residuals
  • Professor of Epidemiology and Field Crop Pathology

Areas of Expertise

  • Integrated management of field crop diseases
  • Plant disease epidemiology
  • Statistical methods for the agricultural sciences
  • Professor Emeritus of Entomology

Areas of Expertise

  • Insect population dynamics
  • IPM
  • Professor of Rural Sociology and Science, Technology, and Society
  • Professor of Agricultural and Regional Economics
  • Director of The Northeast Regional Center for Rural Development

Areas of Expertise

  • Food Systems Economics
  • Economic Growth and Development
  • Regional Economics and Policy
  • Assistant Dean for Graduate Education
  • Associate Director of the Pennsylvania Agricultural State Experiment Station
  • Professor of Vegetable Pathology

Areas of Expertise

  • Integrated vegetable disease management
  • Plant pathogen diagnosis
  • Disease monitoring and forecasting
  • Sustainable crop production
  • J. Franklin Styer Professor of Horticultural Botany and Professor of Plant Molecular Biology

Areas of Expertise

  • Plant Genomics and Genetics
  • Plant Molecular Biology
  • Theobroma cacao (cocoa)
  • Professor of Nutritional Physiology

Areas of Expertise

  • Milk fat synthesis
  • Rumen fatty acid metabolism
  • Omega-3 fatty acids
  • Professor Emeritus of Dairy Science

Areas of Expertise

  • Heifer nutrition and management
  • Effective fiber for dairy cows
  • Professor Emerita of Rural Sociology

Areas of Expertise

  • food systems
  • sustainable agriculture
  • agrarian change
  • sustainability transitions
  • Interim Department Head, Animal Science
  • Associate Professor of Dairy Science
  • Extension Educator, Dairy Team

Areas of Expertise

  • Dairy Advisory Teams
  • Integrated Dairy Management
  • Clinical Professor & Extension Veterinarian
  • Resident Director, Animal Diagnostic Lab
  • Veterinary Extension Team Leader

Areas of Expertise

  • Epidemiology
  • Biosecurity and Infectious Disease Management
  • Bovine Hoof Health, Mastitis, Milk Quality & Milking Equipment
  • Johne's Disease
  • On-farm Food Safety
  • Distinguished Professor of Dairy Nutrition

Areas of Expertise

  • Dairy Nutrition
  • Protein Nutrition of Dairy Cows
  • Rumen Fermentation
  • Nitrogen Utilization
  • Methane Mitigation
  • Environment
  • Professor of Forest Resources

Areas of Expertise

  • Water Energy Food Nexus
  • Bioenergy
  • Agroforestry
  • Forest Economics and Finance
  • International Forestry
  • Forest Extension
  • Non Timber Forest Products
  • Associate Professor of Crop Production / Ecology

Areas of Expertise

  • Agroecology
  • Conservation & Dairy Cropping Systems
  • Soil & nutrient conservation, perennials, cover crops
  • Pasture ecology and grazing management
  • Distinguished Professor of Soil Biogeochemistry
  • Chair of Ecology Intercollege Graduate Degree Program

Areas of Expertise

  • Ecosystem ecology
  • Nitrogen cycle
  • Carbon cycle
  • Forest ecosystems
  • Sustainable agriculture
  • Interim Department Head and Professor of Forest Ecology

Areas of Expertise

  • Global change ecology
  • Forest ecology
  • Dendrochronology
  • Community ecology
  • Professor of Production Systems and Modeling

Areas of Expertise

  • Agroecosystems
  • Soil Carbon and Nitrogen Cycling
  • Hydrologic and Nutrient Cycling Modeling
  • Environmental Biophysics
  • Plant Ecophysiology
  • Associate Professor of Agricultural and Extension Education
  • Director of Graduate Studies for Education, Development, and Community Engagement (EDCE) Graduate Program

Areas of Expertise

  • Program Evaluation
  • Human Dimensions of Natural Resource Management
  • Behavior Change Theories and Frameworks
  • Social Network Analysis
  • Survey Methodology
  • Research Methods and Applied Data Analysis
  • Assistant Dean for Access and Equity
  • Research Professor of Quantitative Forest Ecology
  • University Distinguished Professor

Areas of Expertise

  • crop ecophysiology
  • plant adaptation to abiotic stress
  • plant genetics
  • simulation modeling
  • Research Professor of Plant Biotechnology

Areas of Expertise

  • Plant Biotechnology
  • Plant Functional Genomics
  • Plant Tissue Culture
  • Plant Propagation
  • Plant Disease Resistance
  • Plant – Microbes Interactions
  • Assistant Professor of Civil and Environmental Engineering

Areas of Expertise

  • Water quality
  • Stormwater management
  • Green infrastructure
  • Urban ecohydrology
  • Biogeochemistry
  • Dean, College of Agricultural Sciences
  • C. Lee Rumberger and Family Chair in Agricultural Sciences

Areas of Expertise

  • Reproductive Biology
  • Assisted Reproductive Technologies
  • Animal Science
  • Dairy production
  • Agricultural Biotechnology
  • Agricultural Sustainability
  • Graduate Training
  • Undergraduate Instruction
  • Department Head
  • Professor of Immunology and Molecular Toxicology

Areas of Expertise

  • Redox biology with an emphasis on selenium and selenoproteins
  • Macrophage biology- emphasis on inflammation and resolution
  • Endogenous bioactive lipid mediators
  • Cancer (leukemia) and leukemia stem cells
  • Redox control of stress erythropoiesis during inflammation
  • Professor of Agricultural and Biological Engineering
  • Natural Resource Engineering
  • Director of the Institute for Sustainable Agricultural, Food, and Environmental Science

Areas of Expertise

  • Emerging Contaminants
  • Contaminant Fate and Transport
  • Environmental Hydrology
  • Associate Professor of Agricultural and Biological Engineering

Areas of Expertise

  • Storm water management
  • Watershed modeling
  • Application of optimization tools in watershed analysis
  • Ecohydrological impacts of climate and land use change
  • Professor Emeritus of Agricultural and Biological Engineering

Areas of Expertise

  • Lignocellulosic biomass conversion
  • Bioenergy
  • Manure conversion
  • Sustainable agriculture
  • Professor of Horticultural Systems Management

Areas of Expertise

  • Sustainable vegetable systems
  • Organic vegetable systems
  • Field vegetable production systems
  • High tunnel vegetable production systems
  • Hydroponic vegetable systems
  • Assistant Professor of Marketing and Local/Regional Food Systems

Areas of Expertise

  • Local Food Systems
  • Agritourism
  • Craft beverage industry
  • Value added agriculture
  • Farm management
  • Economics of Animal and Zoonotic Diseases
  • Professor of Molecular Virology
  • Director, Pathobiology Graduate Program

Areas of Expertise

  • Virology
  • Infectious Disease
  • Viral Budding
  • Cellular Trafficking
  • Virus-like Particles
  • Zoonoses
  • Associate Research Professor

Areas of Expertise

  • Land-Atmosphere Water and Carbon Dioxide Fluxes Modeling
  • Meteorology
  • Model-Data Assimilation
  • Distinguished Professor Emeritus of Agricultural and Environmental Economics
  • Extension Veterinarian
  • Professor of Veterinary Science

Areas of Expertise

  • Ruminant nutrition
  • Dairy herd health
  • Metabolic disease
  • Reproduction
  • Nutrition reproduction interactions
  • Small ruminants
  • Llamas and Alpacas
  • Assistant Professor of Agricultural and Biological Engineering

Areas of Expertise

  • Bioproducts Systems Analysis
  • Process Systems Engineering
  • Bioprocess Engineering
  • Biomass Valorization
  • Biosystems Techno-Economic Analysis and Life-Cycle Assessment
  • Associate Professor of Weed Science

Areas of Expertise

  • Weed ecology
  • Herbicide-based weed control
  • Organic weed management
  • Sustainable cropping systems
  • Professor Emeritus of Soil Science / Soil Physics / Biogeochemistry

Areas of Expertise

  • Emerging Contaminants
  • Contaminant Fate and Transport
  • Contaminant Transport Modeling
  • Soil and Water Quality
  • Associate Professor and Extension Specialist, Soil Fertility and Nutrient Management

Areas of Expertise

  • Soil Fertility
  • Nutrient Management
  • Cover Crops
  • Soil Carbon and Nitrogen Cycling
  • Cropping System Modeling
  • Assistant Professor, Youth and Adult Leadership, Penn State Extension

Areas of Expertise

  • Adult and Youth Leadership Development
  • Community Leadership Development
  • Volunteerism
  • Volunteer Leadership Development
  • Needs Assessment Research
  • Evaluation
  • Associate Professor of Environmental and Resource Economics

Areas of Expertise

  • Environmental Economics
  • Urban and Land Use Economics
  • Applied Econometrics
  • Nonmarket Valuation
  • Policy Analysis
  • Associate Professor of Environmental and Resource Economics

Areas of Expertise

  • Environmental and resource economics
  • Land economics
  • Spatial modeling
  • Non-market valuation