{"id":2903,"date":"2026-01-28T18:25:18","date_gmt":"2026-01-29T02:25:18","guid":{"rendered":"https:\/\/puyallup.wsu.edu\/soils\/?page_id=2903"},"modified":"2026-03-02T15:14:27","modified_gmt":"2026-03-02T23:14:27","slug":"lab-alumni","status":"publish","type":"page","link":"https:\/\/puyallup.wsu.edu\/soils\/theteam\/lab-alumni\/","title":{"rendered":"Program Alumni"},"content":{"rendered":"\n

Postdoctoral Researchers<\/h2>\n\n\n
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Dr. Nathan Stacey, 2018-2022, Postdoctoral Researcher
Projects: Biochar as a feedstock for compost, manure management, and soil amendment; Cover crops for large-scale organic onion production in Washington\u2019s Columbia Basin; Evaluating recycled water for vegetable production and contaminants of emerging concern.
Publications: Stacey, N., T. Tea, S. Seefeldt, A. Bary, and D.P. Collins. 2024. Biochar-poultry manure compost alters temperature and nitrogen dynamics during composting and improves potato growth following field application. Compost Science and Utilization<\/em>. DOI:10.1080\/1065657X.2024.2366795<\/a>
Currently: Small Farms Extension Specialist & Soil Scientist, Assistant Professor (Practice) at Oregon State University, Corvallis, OR
From: Saint Louis, MO
LinkedIn<\/a><\/p>\n\n<\/div>\r\n\n<\/div>\n\n\n

Graduate Students<\/h2>\n\n\n
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\"Former<\/a><\/figure>\n\n\n\n

Justin Maltry, MS in Soils, 2023
Thesis: Utilizing summer cover crops to reduce soil compaction.<\/em>
Publications: Maltry, J., G. LaHue, A. Jayakaran, D.P. Collins. Soil compaction in annual crop production: causes, impacts, and solutions<\/a>. 2025<\/em>. WSU Extension Publications<\/em>.
Currently: Agricultural Research Technologist, WSU-Puyallup
From: Cincinnati, OH
Fun fact: I contributed to the development of the curriculum and program for the vermiculture and composting program at the Washington State Department of Corrections and Sustainability in Prisons Project.<\/p>\n\n\n\n

Marc Ouye, M.S. Agriculture, 2022
Project Paper: Arsenic Soil Contamination: Farm Site Risk Assessment & Mitigation Strategies for Small Farmers Growing on Former Sugarcane & Pineapple Lands in Hawaii<\/em><\/p>\n\n\n\n

Ryan Tarbell, M.S. Agriculture, 2019
Thesis: The influence of tillage on vetch cover crop decomposition, N availability, and broccoli yield in organic reduced tillage agriculture.<\/em><\/p>\n\n<\/div>\r\n\n\n

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\"David<\/a><\/figure>\n\n\n\n

David Sullivan, 2017, MS in Soils
Thesis: Cover crop-based strip tillage for organic vegetable production in the Pacific Northwest<\/em>
Publications: Sullivan D. and <\/strong>D.P. Collins. <\/strong>2018. Reduced tillage in organic vegetable production<\/a>. WSU Extension Video<\/em>.  
Currently: Managing Scientist at Valley Irrigation (Spokane Washington)
From: Little Rock, AR
Fun fact: I use soil moisture sensors to schedule irrigation in my raised garden beds.
LinkedIn<\/a><\/p>\n\n\n\n

Bethany Wolters, M.S. Soils, 2015
Thesis: Greenhouse gas emissions in reduced tillage organic vegetables.<\/em><\/p>\n\n<\/div>\r\n\n<\/div>\n\n\n

Undergraduate Researchers with Independent Projects<\/h2>\n\n\n
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Thida Tea, Research and Extension Experience for Undergraduates Fellow, 2019
WSU Summer Undergraduate Research Symposium<\/em>, Pullman, WA 2019: Biochar influences compost temperature and available nitrogen.
Publications: Stacey, N., T. Tea, S. Seefeldt, A. Bary, and D.P. Collins. 2024. Biochar-poultry manure compost alters temperature and nitrogen dynamics during composting and improves potato growth following field application. Compost Science and Utilization<\/em>. DOI:10.1080\/1065657X.2024.2366795<\/a>
Currently: Pretreatment Technician at Pierce County
From: Puyallup, WA<\/p>\n\n\n\n

Naomi DuBois, 2018
WSU Showcase for Undergraduate Research and Creative Activities<\/em> Poster, Pullman, WA 2019: Increasing corn yield through tillage and cover crop management.<\/p>\n\n\n\n

Taylor Enns, 2018
WSU Summer Undergraduate Research Symposium<\/em>, Pullman, WA 2018: Soil quality improvements with biochar and compost<\/p>\n\n\n\n

Tuong Vu, 2017
WSU Showcase for Undergraduate Research and Creative Activities <\/em>Poster, Pullman, WA 2017: Soil nitrate quick test to optimize nitrogen management on organic farms.<\/p>\n\n<\/div>\r\n\n\n

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\"a<\/a><\/figure>\n\n\n\n

Toby Una, 2017
Western Washington University, Huxley College of the Environment, Internship<\/em>, 2017: Tillage effects on soil mesofauna.
Currently: Vice President, Enumclaw Plateau Community Association (EPCA) and Strategic Team Member, Defend Cumberland, a committee of EPCA.
From: Enumclaw, WA
Fun fact: I love making quilts from secondhand textiles<\/p>\n\n\n\n

\"Holly<\/a><\/figure>\n\n\n\n

Holly Lane, 2015
WSU Showcase for Undergraduate Research and Creative Activities<\/em> Poster, Pullman, WA 2016: The effect of reduced tillage on soil moisture, temperature, and light intensity in organic vegetable systems.
From: Auburn, WA
Fun fact: I’ve been to Spain four times and it’s my dream to one day be fluent in Spanish.
Instagram: @hollyylane www.hollylane.realtor<\/a><\/p>\n\n\n\n

Katrina McCann, Soil Science Society of America Golden Opportunities Scholar Undergraduate Program, 2011
Soil Science Society of America<\/em>, San Antonio TX, 2011: Estimating long-term compost application effects on active soil carbon with 24-hour basal respiration.
Soil Ecology Society Bi-Annual Meeting<\/em>, Kelowna, British Columbia, 2011: Variation in soil collembolan populations and microbial biomass on western Washington organic farms.<\/p>\n\n<\/div>\r\n\n<\/div>\n\n\n

Lab and Field Technicians<\/h2>\n\n\n
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\"a<\/a><\/figure>\n\n\n\n

Fiona Ashton-Knochel, 2024-2025
Currently: Managing chemical hazardous waste, Port of Tacoma.
From: Utah
Fun fact: I enjoy chemistry because I am constantly surprised and always learning.<\/p>\n\n\n\n

Amy Wagner, 2024-2025<\/p>\n\n\n\n

\"Portrait<\/a><\/figure>\n\n\n\n

Aidan Touriel, 2025
Currently: Full-time student at WSU
Fun fact: I have 10 pets! 6 chickens, 3 cats, and 1 dog!<\/p>\n\n\n\n

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Katrina Lester, 2025<\/p>\n\n\n\n

Daviti Vardishvili, 2023<\/p>\n\n\n\n

Jayden Kang, 2023<\/p>\n\n\n\n

\"a<\/a><\/figure>\n\n\n\n

Rebekah Lee, 2022
Currently: BEACON Fellow, WA
From: Tacoma, WA
Fun fact: I love linguistics and attempt to speak 4 languages!
LinkedIn<\/a><\/p>\n\n\n\n

Julianne Kellogg, 2017<\/p>\n\n\n\n

Kyle Brown, 2016<\/p>\n\n\n\n

Emma Davis, 2016<\/p>\n\n<\/div>\r\n\n<\/div>\n\n\n

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