Haiying Tao

Haiying Tao.

Assistant Professor/Nutrient Management Specialist

Department of Crop & Soil Sciences
161 Johnson Hall
PO Box 646420
Pullman, WA 99164-6420 USA
Phone: 509-335-4389

Farmer’s Network site

Soil Fertility Lab site

Curriculum Vitae (pdf)


Ph.D., Plant/Soil Science, University of Connecticut, 2007
M.S., Agronomy, China Agricultural University, 2002
B.S., Agronomy, China Agricultural University, 1998

Job Opportunities

We are seeking the following talents to join us as graduate students, research associate/technician, or visiting scholar:

  • Precision agriculture
  • Geostatistics
  • Remote sensing
  • Big data statistics/modeling

Current Research Interests

I lead Soil Fertility Laboratory. Our goal is to advance soil health management for WA agricultural systems through research and extension programs. The current research programs:

  • Soil health assessment for Inland Pacific Northwest agricultural production systems
  • Advancing wheat nutrient recommendations using big data collected using precision agricultural technology
  • Studying strategies to address soil acidification issues in Inland Pacific Northwest cropping systems
  • Sustainable residue management for soil conservation, energy production, feedstock for mushroom and pulp industries.
  • Sustainable land application of dairy manure for crop production, environmental conservation, and food safety
  • Best fertility management strategies for wheat and canola


Washington State Farmers Network


The mission of the Washington State Farmers Network is to advance soil and nutrient management, productivity and sustainability, and profit through participatory research and learning.


The Washington State Farmers Network provides farmers and researchers a platform to share information through structured research and education. By conducting large-scale on-farm research trials, researcher can collect large amount of data across different management practices, soils, and climate conditions for developing more robust models. Through many years of on-farm research, the models will be continuous improved, therefore, the uncertainties in our current nutrient management recommendation systems will be continuously reduced. As a result, farmers will receive systematic and continuously improved nutrient management recommendations.


Tao, H., G. Yorgey, D. Huggins, and D. Wysocki. 2017. Crop residue management, Advances in Sustainable Dryland Farming in the Inland Pacific Northwest. WSU Extension.

Borrelli, K., W.L., Pan, H. Tao, C. Paul, and T. Maaz. 2017. Soil Fertility Management, Advances in Sustainable Dryland Farming in the Inland Pacific Northwest. WSU Extension.

Tao, H., T.F. Morris, B. Bravo-Ureta, and R. Meinert. 2016. Analyzing the implementation of nutrient management plans by farmers: implications for extension education. Journal of Extension. 54(6).

Tao, H., T.F. Morris, B. Bravo-Ureta, and R. Meinert. 2014. Factors affecting manure applications as directed by nutrient management plans at four Connecticut dairy farms. Agron. J. 106: 1-7.

Tao, H., T.F. Morris, B. Bravo-Ureta, R. Meinert, and J. Neafsey. 2012. Nutrient applications reported by farmers compared with performance-based nutrient management plans for cornfields: A Connecticut case study. Agron. J. 104:437-447.

Tao, H., T.F. Morris, B. Brovo-Ureta, R. Meinert, K. Zanger, and J. Neafsey. 2010. A partial budget analysis for phosphorus-based nutrient management plans for Connecticut dairy farms. Agron. J. 102:231-240.

Kyveryga, P., H. Tao, T.F. Morris, and T.M. Blackmer. 2010. Identification of nitrogen management categories by corn stalk nitrate sampling guided by aerial imagery. Agron. J. 102:858-867.


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