Deirdre Griffin LaHue

Deirdre Griffin

Assistant Professor 

Soil health, sustainable soil management, microbial ecology

Northwestern Washington Research & Extension Center
16650 State Route 536
Mount Vernon, WA


Phone: (360) 848-6127

Twitter: @deirdregriff

Curriculum Vita (pdf)


  • Ph.D., Soils and Biogeochemistry, University of California, Davis, 2018
  • M.S., Soils and Biogeochemistry, University of California, Davis, 2015
  • B.S., Environmental Science and Policy, University of Maryland, College Park, 2012

Research Interests

My research focuses on the impacts of agricultural practices (e.g. cover cropping, tillage, amendments, rotations) on soil health and the soil organisms that facilitate many of the functions we look for in a healthy soil, including strong aggregate structure, efficient cycling of nutrients and carbon, and disease suppression. I take a systems approach to understand processes occurring at the micro-scale, such as microbial community shifts, nutrient dynamics, or changes in carbon pools, and to link them to outcomes at the field-scale to develop soil management strategies that will improve the productivity, profitability, and long-term resilience of our cropping systems. I am also working to identify regionally-relevant benchmark values of soil health indicators to track progress towards improved soil sustainability.

Recent Publications

Margenot, A.J., D.E. Griffin, B.S.Q. Alves, D.A. Rippner, C. Li, and S.J. Parikh. 2018. Substitution of peat moss with softwood biochar for soil-free marigold growth. Industrial Crops and Products. 112: 160-169.

Griffin, D.E., D. Wang, S.J. Parikh, and K.M. Scow. 2017. Short-lived effects of walnut shell biochar on soils and crop yields in a long-term field experiment. Agriculture, Ecosystems, and Environment. 236: 21-29.

Wang, D., D.E. Griffin, S.J. Parikh, and K.M. Scow. 2016. Impact of biochar amendment on soil water soluble carbon in the context of extreme hydrological events. Chemosphere. 160: 287-292.

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