van Ouwerkerk, E.N.J. van, R.P Anex, and T.L. Richard, 2007. Web based and Database Driven Biomass Planning Tool. On: Farming Systems Design 2007, Int. Symposium on Methodologies on Integrated Analysis on Farm Production Systems, M. Donatelli, J. Hatfield, A. Rizzoli Eds., Catania (Italy), 10-12 September 2007, book 2 - Field-farm scale design and improvement, pag. 53-54. paper

van Ouwerkerk, E.N.J. van, T.L. Richard and R.P Anex, 2007. Web based and Database Driven Support Tool for Integrated Farming. On: Farming Systems Design 2007, Int. Symposium on Methodologies on Integrated Analysis on Farm Production Systems, M. Donatelli, J. Hatfield, A. Rizzoli Eds., Catania (Italy), 10-12 September 2007, book 1 - Farm-regional scale design and improvement, pag. 171-172. paper

van Ouwerkerk, E.N.J. van, 2007. Breeze demonstration and presentation on biomass harvest features in I-FARM for FSA/NRCS and Extension in Northern Iowa (Palo Alto County). January 4.

van Ouwerkerk, E.N.J., T.L. Richard, and R.P. Anex, 2006. I-FARM: A Web-based Model for Quantifying Farm and Regional Scale Impacts of Bio-refinery Feedstock Supply. Soil Water Conservation Society Workshop "Managing Agricultural Landscapes", Kansas City, October 13. ppt

Burkart, M., D. James, M. Liebman and E. van Ouwerkerk, 2006. Integrating principles of nitrogen dynamics in a method to estimate leachable nitrogen under agricultural systems. Water Science & Technology. Vol 53 No 2, pp 289-301. IWA Publishing. paper

Baali, E.H. and E. van Ouwerkerk, 2005. Energy balance of wheat production in Morocco. Tropentag 2005, Stuttgart-Hohenheim, Germany, October 11-13. abstract paper

van Ouwerkerk, E., T. Richard, and R. Anex, 2005. I-FARM web based integrated farming and biomass planning and decision support tool. ASAE Annual International Meeting 2005, session 301 on Modeling of Farm Systems, Tampa, Flo., July 17-20. abstract presentation

van Ouwerkerk, E., T. Richard, R. Anex & A. Kang, 2005. I-FARM database driven web application. ASAE Annual International Meeting 2005, session 310 on Software Design for Agricultural and Biological Systems,  Tampa, Flo., July 17-20. abstract presentation

van Ouwerkerk, E., R. Anex, T. Richard, K. Shinners, and S. Birrell, 2005. I-FARM web based biomass planning and decision support tool for farmers and decision-makers. Special Technical Session on ‘Modeling tools for Biomass Supply Analysis and Optimization’, Agricultural Equipment Technology Conference (AETC), American Society of Agricultural Engineers (ASAE), Louisville, KY, February 13-15. abstract

van Ouwerkerk, E.N.J., M.Z. Liebman, T.L. Richard, G. May, I. Gutierrez-Montes, and D.E. James, 2004. Farm and county scale scenarios for sustainable agriculture in Western Iowa. Paper Number 043041, American Society of Agricultural Engineers, ASAE/CSAE Annual International Meeting, Ottawa, Canada, 12 pp. paper presentation

van Ouwerkerk, E.N.J., 2004. I-FARM web-based application on integration of crop and livestock production. Soil and Water Conservation Society, 2004 Annual Conference, St. Paul, MN. presentation

van Ouwerkerk, E.N.J., D.E. James, T.L. Richard, M.Z. Liebman, 2003. A multi-model approach for sustainable agriculture in the US corn belt. Paper Number 033009. American Society of Agricultural Engineers. ASAE Annual International Meeting, Las Vegas, 13 pp.  paper