Agri and Aquaculture

Agri and Aquaculture Experts

Jonathan Deenik

Associate Specialist
Department of Tropical Plant and Soil Sciences
University of Hawaii
United States Minor Outlying Islands


Associate Specialist, I teach TPSS 304 Fundamentals of Soil Science every Fall semester and mentor a number of students in my lab.

Research Interest

My program focuses on assisting farmers and land managers in Hawaii implement soil management practices that maintain good crop production, and more important enhance soil quality and protect the soil for future generations. Our work integrates research and extension activities with a strong commitment to farmers throughout Hawaii.


  • Butnan, S., J.L. Deenik, B. Toomsan, M.J. Antal Jr., and P. Vityakon. 2014. Biochar characteristics and application rates affecting corn growth and properties of soils contrasting in texture and Mineralogy. Geoderma (In Press)

  • Novotny R, Fialkowski MK, Li F, Paulino Y, Vargo D, Jim R, Coleman P, Bersamin A, Nigg CR, Leon Guerrero RT, Deenik JL, Kim JH, Wilkens LR. 2014. Prevalence of Young Child Overweight and Obesity in the United States Affiliated Pacific Region as Compared to the 48 Contiguous States: A Systematic Review and Meta-regression by the Children’s Healthy Living Program. Am J Public Health (In press).

  • Silva, J.H., J.L. Deenik, R.S. Yost, G.L. Bruland, and S.E. Crow. 2014. Improving clay content measurement in oxidic and volcanic ash soils of Hawai‘i by increasing dispersant concentration and ultrasonic energy levels. Geoderma (In Press)

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