David D Tarkalson

Research Soil Scientist

Education:

• 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.

Experience:

• 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

Research

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