Ruth M. Dahlquist-Willard

Interim Director, UC SAREP
Sustainable Agriculture Research & Education Program (SAREP)
2801 Second Street
Davis, CA 95618-7779 Create VCard

Also in:
Small Farm Program
Fresno County


Ph. D. Entomology, University of Idaho. 2008
B.S. Biology, UCLA. 1998

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Thao, Touyee; Harrison, Brendan P.; Gao, Si; Ryals, Rebecca; Dahlquist-Willard, Ruth; Diaz, Gerardo C.; Ghezzehei, Teamrat A. (2023). The effects of different biochar-dairy manure co-composts on soil moisture and nutrients retention, greenhouse gas emissions, and tomato productivity: observations from a soil column experiment. Agrosystems, Geosciences & Environment. 6, e20408.
  • Fernandez-Bou, Angel Santiago; Ortiz-Partida, J. Pablo; Classen-Rodriguez, Leticia M.; Pells, Chantelise; Dobbin, Kristin B.; Espinoza, Vicky; Rodriguez-Flores, Jose Manuel; Thao, Chia; Hammond Wagner, Courtney R.; Fencl, Amanda; Flores-Landeros, Humberto; Maskey, Mahesh L.; Cole, Spencer A.; Azamian, Shayda; Gamiño, Eliseo; Guzman, Alexander; Alvarado, Ana Grace F.; Campos-Martinez, Miriam S.; Weintraub, Correen; Sandoval, Espi; Dahlquist-Willard, Ruth M.; Bernacchi, Leigh A.; Naughton, Colleen C.; DeLugan, Robin M.; Medellin-Azuara, Josue (2021). 3 challenges, 3 errors, and 3 solutions to integrate frontline communities in climate change policy and research: lessons from California. Frontiers in Climate. 06 September 2021.
  • Guzman, Aidee; Montes, Marisol; Hutchins, Leslie; De La Cerda, Gisel; Yang, Paula; Kakouridis, Anne; Dahlquist-Willard, Ruth M.; Firestone, Mary K.; Bowles, Timothy; Kremen, Claire (2021). Crop diversity enriches arbuscular mycorrhizal fungal communities in an intensive agricultural landscape. New Phytologist. 231:1, 447-459.
  • Huynh, Bao-Lam; Duong, Tra; Clark, Nicholas E.; Long, Rachael; Light, Sarah E.; Dahlquist-Willard, Ruth M.; Ehlers, Jeffrey D.; Close, Timothy J.; Roberts, Philip A. (2021). Registration of aphid-resistant ‘California Blackeye 77’ cowpea. Journal of Plant Registrations. 16:1, 13-20.
  • Dahlquist-Willard, Ruth; Ramos Espinoza, Maria L.; Yang, Michael; Engelskirchen, Gwenael; Feenstra, Gail (2020). Challenges and opportunities for small farms marketing dried moringa products in California’s San Joaquin Valley. Western Economics Forum. 18:2, 61-64.
  • Méndez-Barrientos, Linda Estelí; DeVincentis, Alyssa; Rudnick, Jessica; Dahlquist-Willard, Ruth; Lowry, Bridget; Gould, Kennedy (2020). Farmer participation and institutional capture in common-pool resource governance reforms. The case of groundwater management in California. Society and Natural Resources. 33:12, 1486-1507.
  • Mendoza, Carmen T.; Dahlquist-Willard, Ruth M. (2020). Initiating farm-to-school programs with small, socially disadvantaged farmers: a case study in Fresno. Western Economics Forum. 18:2, 81-85.
  • Achmon, Yigal; Claypool, Joshua T.; Fernández-Bayo, Jesús D.; Hernandez, Katie; McCurry, Dlinka G.; Harrold, Duff R.; Su, Joey; Simmons, Blake A.; Singer, Steven W.; Dahlquist-Willard, Ruth M.; Stapleton, James J.; VanderGheynst, Jean S.; Simmons, Christopher W. (2020). Structural changes in bacterial and fungal soil microbiome components during biosolarization as related to volatile fatty acid accumulation. Applied Soil Ecology. 153, 103602.
  • Fernández-Bayo, JD; Randall, TE; Harrold, DR; Y, Achmon; KV, Hestmark; J, Su; Dahlquist-Willard, RM; Gordon, TR; Stapleton, JJ; VanderGheynst, JS; Simmons, CW (2018). Effect of management of organic wastes on inactivation of Brassica nigra and Fusarium oxysporum f.sp. lactucae using soil biosolarization. Pest Management Science. 74:8, 1892-1902.
  • Oldfield, Thomas; Achmon, Yigal; Perano, Kristy; Dahlquist-Willard, Ruth; VanderGheynst, Jean; Stapleton, James; Simmons, Christopher; Holden, Nicholas (2017). "A life cycle assessment of biosolarization as a valorization pathway for tomato pomace utilization in California." Journal of Cleaner Production 141: 146-156.
  • Fernández-Bayo, Jesús; Achmon, Yigal; Harrold, Duff; McCurry, Dlinka; Hernandez, Katie; Dahlquist-Willard, Ruth; Stapleton, James; VanderGheynst, Jean; Simmons, Christopher (2017). Assessment of two solid anaerobic digestate soil amendments for effects on soil quality and biosolarization efficacy. Journal of Agricultural and Food Chemistry. 65:17, 3434–3442. April 14.
  • Fernández-Bayo, Jesús; Achmon, Yigal; Harrold, Duff; Claypool, Joshua; Simmons, Blake; Singer, Steven; Dahlquist-Willard, Ruth; Stapleton, James; VanderGheynst, Jean; Simmons, Christopher (2017). Comparison of soil biosolarization with mesophilic and thermophilic solid digestates on soil microbial quantity and diversity. Applied Soil Ecology. 119, 183-191. October.
  • Achmon, Yigal; Fernandez-Bayo, Jesús D.; Hernandez, Katie; McCurry, Dlinka G.; Harrold, Duff R.; Su, Joey; Dahlquist-Willard, Ruth M.; Stapleton, James J.; VanderGheynst, Jean S.; Simmons, Christopher W. (2017). "Weed seed inactivation in soil mesocosms via biosolarization with mature compost and tomato processing waste amendments." Pest Management Science 73(5): 862-873.
  • Dahlquist-Willard, Ruth; Marshall, Megan; Betts, Stacy; Tuell-Todd, Carrie; VanderGheynst, Jean; Stapleton, James (2016). "Development and validation of a Weibull-Arrhenius model to predict thermal inactivation of black mustard (Brassica nigra) seeds under fluctuating temperature regimens." Biosystems Engineering 151: 350-360.

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