Staff Directory /

Dr. Robert Mikkelsen

Curriculum Vitae: download
Color Photo: download
Black & White Photo: download

4125 Sattui Court
Merced, CA 95348
Dr. Mikkelsen became the Director of Western North America programs for the Potash & Phosphate Institute in 2002, which became the International Plant Nutrition Institute in 2007. Since 2014, he is serving as the Vice President of Communications for IPNI.

He was previously Professor of Soil Science at North Carolina State University (NCSU) in Raleigh and Soil Chemist at the National Fertilizer Development Center at Muscle Shoals, Alabama.

Widely known for his research and expertise in nutrient management, Dr. Mikkelsen has authored or co-authored numerous research publications and book chapters. In addition to basic agronomic and fertilizer technology, his research has included nutrient interactions with the environment, animal waste management, and nutrient budgets.

A native of California, Dr. Mikkelsen earned his B.S. degree in Agronomy/Soils at Brigham Young University in 1981, then received his Ph.D. in Soil Science at University of California, Riverside, in 1985.

Dr. Mikkelsen is involved in many professional societies, including the American Society of Agronomy, the Soil Science Society of America, and the American Society of Horticultural Science. He is a Fellow of the American Society of Agronomy and a Fellow in the Soil Science Society of America, a recognition given to 0.3% of the society’s members. He is a Certified Crop Advisor and a Certified Professional Horticulturist.


B.S. Brigham Young University (Agronomy)
Ph.D. University of California, Riverside (Soil Science)

Awards & Recognition

Soil Science Industry and Professional Leadership Award. Soil Science Society of America. 2014
Fluid Fellow. Fluid Fertilizer Foundation. 2013
Agronomic Industry Award, American Society of Agronomy, 2009
Fellow - Soil Science Society of America, 2007
Fellow - Agronomy Society of America, 2005
Editorial Boards:

  • Soil Science Society of America Journal
  • Agronomy Journal
  • Journal of Environmental Quality
  • Fertilizer Research
  • Nutrient Cycling in Agroecosystems
  • NCSU College of Agriculture & Life Science: Outstanding Graduate Instructor of the Year. 2000
  • University of California, Riverside: Gamma Sigma Delta Outstanding Alumnus Award, 1995

  • Professional Service

    Selected examples:

  • American Society for Horticultural Science; Vice President
  • Soil Science Society of America Board of Directors
  • Certified Crop Advisor (California) Chairman of the Board
  • ASA/CSSA/SSSA Science Policy Advisory Committee
  • Soil Science Society of America Division S-4 Chairman (Soil Fertility and Plant Nutrition)
  • Soil Science Society of America Book Series Committee
  • Chairman: WERA-103: Nutrient Management and Water Quality
  • Chairman: SERA-IEG 24 Committee Composting and Compost Utilization
  • Fertilizer Research and Education Program (California) Advisory Board
  • American Society of Agronomy (California Chapter) Board of Directors
  • Western Fertilizer Handbook editor (3rd Hort. ed.)
  • Fluid Fertilizer Foundation Research & Education Committee