Dorivar Ruiz Diaz, PhD

Assistant Professor


Soil Fertility and Nutrient Management



2711 Throckmorton Hall
Kansas State University
Manhattan KS, 66506





Ph.D. (Soil Fertility), 2007, Iowa State University

M.S. (Soil Science), 2004, University of Illinois, Urbana-Champaign

B.S. (Agronomy), 2000, Zamorano University, Honduras


Research Interests


Soil fertility and nutrient management.  Efficient use of fertilizer, land application of waste material (biosolids and manure) with emphasis on crop–available nitrogen.  Assessment of environmental risk associated with nutrient management and tillage. Biometry, the design and analysis of experiments, the use of mixed model techniques and generalized mixed models.


Professional Association:

Soil Science Society of America

American Society of Agronomy

International Biometric Society




Outstanding Graduate Student, 2005. North Central Region Extension-

Industry and Soil Fertility. 

Grad. Student Poster Award, 2006. American Society of Agronomy

Gamma Sigma Delta. Honor Society of Agriculture.



“We know more about the movement of celestial bodies than about the soil underfoot”Leonardo Da Vinci, circa 1500’s