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United States Department of Agriculture

Agricultural Research Service

David D Tarkalson

Research Soil Scientist


  • Ph.D. 2001, North Carolina State University, Raleigh, NC. Soil Science. Minor: Water Resources.
  • M.S. 1998, Brigham Young University, Provo, UT. Agronomy.
  • B.S. 1996, Brigham Young University, Provo, UT. Agronomy, Emphasis: Environmental Science. Minor: Chemistry.
  • A.S. 1993, Ricks College, Rexburg, ID. Arts and Science.


  • 2001-2006: Assistant Professor, Soil Fertility and Nutrient Management, University of Nebraska-Lincoln West Central Research and Extension Center, North Platte, NE.
  • 2007-present: Soil Scientist/Systems Agronomist, USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, ID.

Professional Societies:

  • American Society Agronomy
  • Soil Science Society of America
  • Crop Science Society of America


Expertise and Scientific Interests:

  • Fertilizer use efficiency of crops.
  • Manure management for improved crop production and environmental protection.
  • Nutrient management and crop production under deficit and full irrigation management strategies.
  • Crop production under different tillage practices and planting configurations.
  • Fate of pharmaceuticals in soil and water.

Current Research:

  • Evaluation of potato planting configurations, plant populations, nitrogen fertilizer rates, and irrigation amounts on production and fate of nitrate-nitrogen in the soil profile.
  • Determining factors controlling phosphorus leaching in soils.
  • Evaluation of strip-tillage and fertilizer placement strategies in field corn and sugar beet production.

Updated June 2007

Last Modified: 8/12/2016
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