• Ph.D. in Soil and Water Science (Soil Chemistry-Water Quality), University of Florida, Aug. 1997.
• M.S. in Horticultural Sciences (Vegetable Crops), University of Florida, December 1992.
• B.S. in Agronomy, Iowa State University, May 1986.
• Agronomo, Escuela Agricola Panamericana, "El Zamorano" Honduras, 1981.

Professional Experience

• University of Arkansas Cooperative Extension Service, Division of Agriculture.
  Associate Professor – Soil Scientist. July 2007  to present.
• University of Arkansas Cooperative Extension Service, Division of Agriculture.
  Assistant professor - Extension Agronomist - Soils. October 2001 to June 2007.
• Texas A&M University, Soil and Crop Sciences Department.
  Extension Specialist, August 1999 to October 2001.
• University of Florida, Soil and Water Science Department.
  Postdoctoral Research Associate, August 1997 to August 1999.
• University of Florida, Soil and Water Science Department.
  Graduate Research Assistant, August 1990 to July 1997.  
• Iowa State University, Agronomy Department.
  Support Personnel, August 1985 to May 1986.
• Escuela Agricola Panamericana, "El Zamorano," Honduras.
  Plant and Soil Testing Lab Manager, January 1983 to March 1984.
• Honduran Government.      
  Extension Agent, February 1982 to December 1982

Understanding the Numbers in Your Soil Test Report

http://www.uaex.edu/Other_Areas/publications/PDF/FSA-2118.pdf

The Use of Poultry Litter in Row Crops

http://www.uaex.edu/Other_Areas/publications/PDF/FSA-2147.pdf

L. Espinoza, L., M. Ismanov, P. Ballantyne, and J. Pantoja. 2007. Yield Response of Canola to Varying Nitrogen Rates. 2007. In: N. Slaton (ed.). Wayne E. Sabbe Arkansas Soil Fertility Studies 2007. University of Arkansas Agricultural Experiment Station Research Series 558:18-20

Espinoza, L., J. Kelley, and P. Ballantyne.2005. Yield Response of Grain Sorghum to Varying Nitrogen Rates Under Irrigated and Non-irrigated Conditions In: N. Slaton (ed.). Wayne E. Sabbe Arkansas Soil Fertility Studies 2005. University of Arkansas Agricultural Experiment Station Research Series 537:25-29.

L. Espinoza, C. Kennedy, and P.Ballantyne. 2005. Fertilizer Recommendations for Cotton in Arkansas Under Conventional and Reduced Tillage Systems. In: N. Slaton (ed.). Wayne E. Sabbe Arkansas Soil Fertility Studies 2005. University of Arkansas Agricultural Experiment Station Research Series 537:30-34.

Espinoza, L., M. Mozzaffari, N.A. Slaton, R. Wimberly, R. Thompson, and R. Klerk. 2003. Soybean Yield Response To Foliar And Soil-Applied Boron Rates. In: N. Slaton (ed.). Wayne E. Sabbe Arkansas Soil Fertility Studies 2005. University of Arkansas Agricultural Experiment Station Research Series 471:76-80.