Crop & Soil Science Spring 2024 Seminar Series


Join us for the Spring 2024 Seminar Series at 4pm on Mondays. The seminar series schedule is posted below for upcoming seminars. Seminars will be held in ALS 4000 with a Zoom option, you will receive a Zoom link once you have registered to attend. Please register in advance to attend the seminar.


Recorded Seminar presentations will be posted on this page as they become available. Click on the pictures below to access the seminar recordings.


Registration Link Coming Soon


April 1, 2024

How international experiences contribute to a role in IPM Education - Thomas Jima, Integrated Pest Management (IPM) Educator at the Oregon IPM Center

Bio: In 2023, Thomas A. Jima joined Oregon State University – Oregon IPM Center as an Integrated Pest Management (IPM) Educator. Thomas holds an M.S. in Plant Biology specializing in Plant Pathology and M.S. in Entomology, with a B.S. in Plant Sciences. Thomas has over 10+ years of international experience as a specialist advisor focused on agricultural development, research, project management, capacity building, and clientele management with an emphasis on Plant Protection and IPM. Thomas enjoys learning new things, seeking new opportunities, and becoming proficient at his job. Thomas works independently but gets motivated by teamwork. In his free time, Thomas enjoys being outdoors with his kids hiking and playing sports.

April 8, 2024

High-throughput plant phenotyping technologies towards improving crop breeding efficiency - Dr. Jing Zhou, Assistant Professor of Precision Agriculture - OSU

Bio: Jing is an Assistant Professor in the Department of Crop and Soil Science at the Oregon State University. Jing earned his Ph.D. degree in Biological and Agricultural Engineering at the University of Missouri-Columbia. Jing worked as a postdoctoral research associate in the Digital Agriculture Lab at the University of Wisconsin-Madison. Jing’s research focuses on providing solutions for forming a sustainable food and agricultural system with emerging technological and computational resources.

April 15, 2024

Victor Ribeiro

EPSPS Copy Number Variation is Correlated with Glyphosate Resistance in an Italian Ryegrass Population - Victor Ribeiro, Crop Science PhD student - OSU

Bio: Victor's early passion for weed research led him to join Oregon State University for a Doctoral Degree in Weed Science. Currently, Victor is a Ph.D. candidate in the Crop Science graduate program under Drs. Carol Mallory-Smith and Judit Barroso, and his research is focused on herbicide resistance in downy brome (Bromus tectorum L.) in wheat production systems in Eastern Oregon. Victor's interests in Weed Science are very broad, ranging from applied weed research, where he is interested in understanding growers’ practices and factors affecting their decisions, to basic research including weed biology and ecology and, molecular mechanisms of herbicide resistance in weeds.

April 15, 2024

pete berry

Integrating unmanned aerial system (UAS) imagery with ground-based spot spray application technology - Dr. Pete Berry, Assistant Professor of Weed Science - OSU

Bio: Pete's journey has come full circle, starting with the completion of his PhD at Oregon State University under Dr. Carol Malloy-Smith. He then ventured to Central Illinois, where he worked for Syngenta as a field scientist. In the fall of 2022 Pete returned to OSU as an assistant professor in the Department of Crop and Soil Science. Pete's program focuses on integrating GIS technologies into weed science. His current projects span mapping resistant weed populations across the PNW, quantifying weed populations using drone imagery, employing image classification for weed recognition in Oregon cropping systems, investigating spectral variation among weeds and crops and utilizing spot spray technology.

April 22, 2024

Thomas Chastain

My journey as a seed scientist and other tales - Dr. Thomas Chastain, Department Head and Professor of Seed Crop Physiology and Ecology - OSU

Bio: Thomas Chastain is Department Head and Professor of Seed Crop Physiology and Ecology in the Department of Crop and Soil Science at Oregon State University.  He earned a B.A. in Biological Sciences from California State University, Chico, and M.S. and Ph.D. in Crop Science from OSU.  Dr. Chastain’s research and teaching efforts over the past 35 years at OSU have focused on the physiology, ecology, and management of seed crops. 

April 29, 2024

Investigations into the Influence of Essential Oils on the Inhibition of Seed Germination Rate, Seedling Height, and Radical Length in Barley and Wheat - Luluh Aljayan, Crop Science MS student - OSU

Bio: Luluh is a masters student in crop science with a background in public health. She is passionate about combining sustainable farming and health to find natural solutions for agricultural problems. She is especially interested in how plants and essential oils can help crops grow better and fight pests in a way that's good for the environment and our health.

April 29, 2024

Toxicity of essential oils to the pests Arion circumscriptus (Gastropoda) in laboratory and greenhouse trials - Fares Alzahrani, Crop Science PhD student - OSU

Bio: Fares Alzahrani is from Saudi Arabia, with an undergraduate degree in zoology and a Master’s in Crop Science with an entomology focus from Oregon State University, obtained in 2019. This spring, he is completing his Ph.D. in the same field, guided by Dr. Rory McDonnell. His research targets the control of slugs and moth pests with essential oils, aiming to offer sustainable pest management solutions.

May 6, 2024

The Impact of Pacific Northwest Soil Properties on N Mineralization of Dairy Manure - Ryan Auld, Soil Science MS student - OSU

Bio: Ryan is a graduate student working towards a master’s degree in Soil Science. After completing an undergraduate thesis focused on in-situ nitrate monitoring, Ryan knew he wanted to focus on nitrogen in his academic career. As a graduate student, Ryan has focused on extension research, including his thesis which investigates the relationship between soil properties and nitrogen mineralization of dairy manure in the Pacific Northwest. Outside of the nitrogen cycle, Ryan is also very passionate about laboratory analyses and loves learning new techniques he can apply to his research. After earning his master’s degree, Ryan hopes to continue onto a Ph.D. program in Soil Science with the eventual goal of becoming a professor.

May 6, 2024

Do soil properties control N-cycling in forest stands of the Pacific Northwest? - Dandan Zhang, Soil Science PhD student - OSU

Bio: Dandan’s interests in soil microbiology led her to join Oregon State University for a Doctoral Degree in Soil Science. Dandan used to be a Ph.D. candidate in the Soil Science graduate program under Dr. David Myrold and is currently under Dr. Markus Kleber.  Her research is focused on protease activity in soil under N-fixing tree species vs non-N-fixing tree species in forest ecosystems. She also is interested in metagenomic sequencing and data analysis.

May 13, 2024

Ammonia Volatilization Potential from Surface-applied Anaerobically Digested Dairy Manure - Corinne Butler, Soil Science MS student - OSU

Bio: Corinne’s love for soil was discovered during her undergraduate career at UC Davis. This led her to pursue her master’s degree at Oregon State University. Corinne is currently working with Dr. Amber Moore in the Soil Science graduate program. Her research is focused on ammonia volatilization from surface-applied anaerobically digested dairy manure in a lab setting. Corinne has many interests in Soil Science and Agronomy, including soil fertility, nutrient management, crop production, and applied agricultural research that will directly help growers in real-time.

May 13, 2024

Susceptibility of Endemic Snails Vespericola columbianus and Ancotrema sportella to Parasitic Nematode Phasmarhabditis californica - Indira Kulkarni, Crop Science MS student - OSU

Bio: Indira is a Crop Science Master’s student studying the non-target effects of novel biological control on endemic terrestrial gastropods in the Pacific Northwest with Prof. Rory McDonnell. She is originally from Wappingers Falls, NY and attended the University of Vermont for her undergraduate degree in Neuroscience. She became interested both in ecology and conservation when she moved out to Oregon and led a crew for the Northwest Youth Conservation Corps, working and living outside. She decided to return to graduate school to pursue her interests in gastropod and insect species preservation and has enjoyed learning about the many facets of this field since diving in.

Past Seminars

2023-2024 Seminars

November 6, 2023

Introgression and marker-assisted mapping for Columbia root-knot nematode (CRKN) resistance in potato - Shengwei Hu, Crop Science PhD Student 

November 13, 2023

Improving the toolbox for integrated management of field bindweed - Jessica Green, Crop Science PhD Student 

November 20, 2023

Runoff, rangelands, & ruminants: quantifiying the water quality impacts of agricultural manure application in Oregon - Pierce McClendon, Water Resources Master's student

November 27, 2023

Dr. Rob Wiedenmann

2022-2023 Seminars

April 24, 2023

Drought and Heat Pressures in Oregon Agriculture- A Statewide Needs Assessment - Berit Dinsdale, Postdoctoral Scholar, OSU

May 8, 2023

Areej Abdullah Alzarqaa - Crop Science PhD Student

May 15, 2023

What I did on my summer vacations – for 40 years - Dr. Bob Zemetra, Professor Wheat Breeding and Genetics OSU

May 22, 2023

Potato dihaploids: pre-breeding for diploid hybrid - Hemant Kardile, Crop Science PhD Student 

June 5, 2023

Sahalie Ellickson

Calcium source and placement strategies for addressing soil acidity in no-till wheat - Sahalie Ellickson, Soil Science MS Student

Bio: Sahalie Ellickson is a current masters student in soil science with advisor Dr. Amber Moore and this is her third term in the program. She is a native Oregonian and completed her B.S. here at Oregon State in Environmental Sciences in 2021 with a focus on agriculture. In her undergrad she worked with the wheat research and breeding program also here at OSU which has helped support and direct her towards the field topics of soil fertility and agronomy.

June 5, 2023

casey messman

Alfalfa Fertility Survey of the Pacific Northwest - Casey Messman, Soil Science MS Student

Bio: Casey was born and raised in Eugene Oregon. He earned his bachelor’s degree in Agriculture Science at Oregon State University. He has 5 years’ worth of agricultural experience working with a wide variety of crops such as hops, caneberries, organic vegetables, wheat, and alfalfa. For his master’s in soil science, he is conducting an alfalfa fertility survey for the Pacific Northwest. 

October 3, 2022

pete berry

Utilizing GIS Technologies in Weed Science - Dr. Pete Berry, Assistant Professor Weed Science OSU

October 10, 2022

alexander butcher

Evaluating Chemical Elicitors of Plant Defense Responses Against Insect Pests of Potato - Alexander Butcher, Crop Science Masters Student

October 10, 2022

jack pieper

Evaluation of Potassium Fertilization on the Yield and Quality of Different Potato Varieties - Jack Pieper, Crop Science MS Student

October 17, 2022

Markus Kleber

Assessing Soil Quality - Dr. Markus Kleber, Professor Soil Science OSU

October 24, 2022

soil 512 summer 2022 class

Field and Lab Analysis in Four Oregon Agricultural Soils: A Summary of Findings from SOIL 512 and 514 - Summer SOIL 512/514 Class Presentation: Heidi Noordijk, Jack Pieper, Casey Messman, Jen Valentine, Amanda Cox and Robert Laurie

October 31, 2022

Parallel Lives: 1) Aphid Taxonomist/Natual Historian and 2) Research Coordinator/Science Advisor to the Northwest Potato Industry - Dr. Andy Jensen, Manager, NW Potato Research Consortium

November 7, 2022

Dr. Eyel Fridman in greenhouse and Plant Physiology book

Recombining Genomics and Alleles of Adaptive Traits in Barley - Dr. Eyal Friedman, Plant Sciences Institute Volcani Agricultural Research Organization (ARO), Isreal

November 14, 2022

brigid meints in field

Engaging and Educating Policy-makers: What I Learned as a SEED Ambassador - Dr. Brigid Meints, Assistant Professor OSU

November 14, 2022

Jelena Viskovic

Multiple Utilization of Hemp - Jelena Viskovic, Crop Science PhD Student

November 21, 2022

grace tiwari

Improving Management of Clover Seed Weevil in White Clover Seed Production System in Oregon - Grace Tiwari, Crop Science MS Student

November 21, 2022

samikshya budhthoki

Evaluating Cover Crop Options in Columbia Basin of Oregon - Samikshya Budhathoki, Soil Science MS Student

November 28, 2022

Essential oils for inhabiting sprouts in stored potatoes - Hanin Almutairi, Crop Science PhD Student

November 28, 2022

Essential oils as inhibitors of potato tuber sprouting in storage - Areej Abdullah Alzarqaa, Crop Science PhD Student

December 5, 2022

nima samadirad

How Wild Potato Species Can Change the Strategies in Managing Colorado Potato Beetle - Nima Samadirad, Crop Science PhD Student

December 5, 2022

cesar zamora working with equipment in field

Soil Disturbance and Microbial Community Shifts in Soils of the Willamette Valley - Cesar Zamora, Soil Science MS Student

2021-2022 Seminars

September 27, 2021

Understanding the Soil Hydrophysical behavior for Sustainable Expansion of Reuse Water Irrigation in Umatilla Basin - Dr. Amin Nouri, Oregon State University. 

October 11, 2021

Policy and Programs to Advance Climate Resilience on Oregon’s Agricultural Lands - Oregon Agriculture & Climate Network


October 18, 2021

A Career in Ag Exports - the view from the PNW - Don Schilling and Jordan Miller, Wesco International

October 25, 2021

Modeling pest distributions, phenology, and population dynamics to safeguard US agricultural lands - Dr. Brittany Barker Presentation Slides

November 8, 2021

Romp of Otters - Potential for "Updated" Heirloom Barley Varieties and Impact on Base Malt and Beer Flavor - Campbell Morrissy, Crop Science PhD Student

November 15, 2021

Slashin' and Thrashin' - Characterizing Breeding Traits for Organic Naked Barley - Cristiana Vallejos, Crop Science MS Student

November 15, 2021

The Foliar Application of Microcutrients for Disease Control of Zymoseptoria Tritici Blotch in Wheat - Jackson Smith, Crop Science MS Student

November 22, 2021

Characterization of changes in soil micro-structure: Agricultural and Environmental Implications - Dr. Maoz Dor, Postdoctoral Fellow Oregon State University

Maoz Dor is a postdoctoral fellow in Dorthe Wildenchild's group at Oregon State University's School of Chemical, Biological, and Environmental Engineering. He received His MSc and PhD in Soil Science from the Hebrew University of Jerusalem, Israel. The focus of Maoz's research is the complex interaction of chemical, physical, and biological mechanisms affecting soil structure formation and deterioration.

November 29, 2021

Estimating Carbon Stocks in Tall Fescue Grass Seed Fields - Dr. Martina Gonzalez Mateu

Seasonal Application Timing Effects on the Plant Availability of Elemental Sulfur-based Fertilizers - Amanda Cox, Crop and Soil Science MS Student

December 6, 2022

Hemp Micropropagation Using Alternate Growing Medium Componets and Comparison of Plant Vigor Outcomes by Genotype in Tissue Culture and in the Greenhouse - Margaret Halstead, Crop Science MS Student

January 24, 2022

The Draft Psuedo-Chromosomal Scale Hop Genome and Applications in Plant Breeding - John Henning, USDA-ARS 


January 31, 2022

The Horticulturalist who killed her plants: Meet the New Head Advisor in Horticulture - Anne Gearhart, Department of Horticulture Head Adviser


February 7, 2022

nima samadirad

Investigating plant-pest interactions between potato and Colorado potato beetle in the western United States - Nima Samadirad, Crop Science PhD Student

February 7, 2022

Interavtive effects of fumigation and cover crops on potato production in the Columbia basin - Esther Kim, Soil Science Masters Student

February 14, 2022

Combining Forward and Reverse Genetics Tools for Developing Sustainable Next-Generation Wheat Cultivars - Dr. Vijay Tiwari, University of Maryland Assistant Professor


Seminar recording available to OSU faculty, staff and students only

February 21, 2022`

Determining direct and indirect influences of component variables on crimson clover to breed for higher seed yield - Kimber Hale, Crop Science Masters Student


March 7, 2022

Dr. Tim Warren

Long-distance Dispersal in Drosophila - Dr. Tim Warren, Department of Botany and Plant Pathology Assistant Professor

About Me

April 4, 2022

Goals, strategy, initiatives and educational resources to make progress on diversity, equity and inclusion at OSU - Jeff Kenney, Director, Institutional Education for Diversity, Equity and Inclusion at OSU

April 11, 2022

Climate change and Oregon agriculture: the Oregon Climate Action Plan, the Legislature, and OSU Extension

Megan Kemple and Ashley Rood - Oregon Climate & Agriculture Network

Lauren Gwin - Associate Director, Center for Small Farms & Community Food Systems at OSU

Gordon Jones - Assistant Professor (Practice), Southern Oregon Research and Extension Center

April 18, 2022

Potato Powdery Scab: Expanding Genomic Resources for the Pathogen and the Host - Abigail Moore, Crop Science Masters Student

May 2, 2022

Storage and deterioration of hemp seed (Cannabis sativa I.) - Grace Fuchs, Crop Science Masters Student

May 2, 2022

Essential Oils for Sprout Suppression in Stored Potato - Jena Thoma, Crop Science Masters Student

May 9, 2022

hemant kardile

Genome Instability of Potato Dihaploids - Hemant Kardile, Crop Science PhD Student

May 9, 2022

Victor Ribeiro

Herbicide resistance in downy brome (Bromus tectorum I.) in eastern Oregon - Victor Ribeiro, Crop Science PhD Student

May 16, 2022

The Oregon Seed Certification Service - Andrew Altishin, Seed Certification Manager


May 23, 2022

Sabry Elias

How can OSU Seed Lab help researchers and the seed industry - Dr. Sabry Elias, Crop and Soil Science Department Professor, OSU

June 6, 2022

A Re-evaluation of Risk Factors for Overwintering of Powdery Mildew Flag Shoots in Hop - Robert Laurie, Crop Science Masters Student

2020-2021 Seminars

September 28, 2020

Daniela Carrijo

Towards the Sustainable Intensification of Agronomic Crops - Daniela Carrijo, Assistant Professor OSU

October 12, 2020

Constraining the Mechanisms that Influence the Retention and Persistence of Fluorinated Organic Chemicals in Soil - Thomas Wanzek, Soil Science PhD Student

October 19, 2020

Lithologic Controls on Soil Carbon Partitioning in the Alaskan Coastal Temperate Rainforest - Julia Fleiner, Soil Science Masters Student

October 26, 2020

Soil and Landscape Evolution in Ilha Comprida (Southeastern Brazil) - Pedro Martinez, Soil Science PhD Student

November 2, 2020

brigid meints in field

Organic Multi-Use Naked Barley: Breeding for the Future - Brigid Meints, Assistant Professor OSU

November 9, 2020

Leveraging Metagenomics to Understand the Microbial World Underfoot - Xinda Lu

November 16, 2020

Challenges and Opportunities for Pest Management in Organic Vs. Conventional Agriculture: A Thrips Perspective - Anitha Chitturi

November 23, 2020

Govinda Strestha

Developing an Integrated Pest Management Program to Control Lygus bugs in the Lower Columbia Basin - Govinda Shrestha

November 30, 2020

Tessa Barker

Olive Production in Oregon: Grower Experiences and Evaluation of On-Farm Propagation and Orchard Establishment Practices - Tessa Barker, Crop Science Masters Student

2017-2018 Seminars

February 28, 2018

Glyphosate and Soil Microbial Communities: Fake News vs. Facts - Dr. Timothy Paulitz, USDA-ARS Wheat Health, Genetics and Quality Research Unit Pullman, WA

Glyphosate (Roundup) is the most widely used herbicide in the world, and is a key component of no-till systems throughout the world, especially in the Pacific Northwest. It is relatively safe, tightly bound to soil particles, is broken down by microbes, and does not have a long residual in the soil. However, there is concern about non-target effects, especially on beneficial bacteria and fungi in the soil.

With a next-generation sequencing approach, Paulitz and colleagues addressed the question: how does glyphosate affect soil microbes in the Pacific Northwest? Bacterial and fungal communities were found to be strongly affected by field location and cropping system, but glyphosate application had only a very minor role in shaping microbial community composition. More bacterial and fungal taxa were stimulated by glyphosate use than were reduced, a response attributed to the presence of dying roots, providing a greenbridge effect.

Dr. Paulitz is a plant pathologist who has spent his career on biological control and and cultural management of soilborne diseases, especially diseases of wheat.

February 23, 2018

The Rodale Center and its Influence on Organic Farming Research - Jeff Moyer, Executive Director of the Rodale Institute

Jeff Moyer is a world renowned authority on organic agriculture. His expertise includes organic crop production systems with a focus on weed management, cover crops, crop rotations, equipment modification and use, and facilities design. Jeff is perhaps most well known for conceptualizing and popularizing the No Till Roller Crimper for use in organic agriculture. In 2011, he wrote Organic No-Till Farming, a publication that has become a resource for farmers throughout the world.

Jeff brings a farmer’s perspective and approach to issues in organic agriculture. He is a past chair of the National Organic Standards Board, a founding board member of Pennsylvania Certified Organic, the Chairman of the Board of Director of The Seed Farm, part of the Green America Non-GMO Working Group, a Project Member of The Noble Foundation’s Soil Renaissance project, and a Board Member of PA Farm Link.

In September 2015, Jeff was appointed as Executive Director of Rodale Institute after spending the last four decades at the Institute, helping countless farmers make the transition from conventional, chemical-based farming to organic methods.

Rodale Institute was founded in 1947 by organic pioneer J.I. Rodale to study the link between healthy soil, healthy food and healthy people. It is committed to groundbreaking research in organic agriculture, advocating for policies that support farmers, and educating people about organic food and farming.