1979-1980 | Dr. Takashi Ibusuki

  • National Research Institute for Pollution, Japan

l989-l990 | Dr. Chandana Senaratne

  • North Carolina State University, USA

1995-1996 | Dr. Deug-Soo Kim

  • Kunsan National University, Republic of Korea

Fall 1997 | Dr. Ilie Fishtik

  • The Academy of Sciences of Moldova, Moldova

February 1999-July 1999 | Dr. Mahmoud El-Sharkaway

  • Fulbright Senior Scholar, Egypt

2002-2004 | Dr. Deug-Soo Kim

  • Kunsan National University, Republic of Korea

2006-2008 | Dr. Jessica Blunden

  • North Carolina State University, USA

Mr. Guillaume Grandjean

  • National Institute of Agronomic Sciences, Grignon, France