Bachelor of Science in Tropical Agriculture, State College Tropical Agriculture, Deventer, The Netherlands, 1960. Diplom-Ingenieur agriculture, Justus-Liebig University, Giessen, Germany, 1965. Master of Science, Kansas State University, 1966.
Doctor of Philosophy in Soil Microbiology, University Giessen, 1969.
Lecturer microbiology Technology University, Darmstadt, Germany, 1970-1974. Professor soil biochemistry University Hohenheim, Stuttgart-Hohenheim, Germany, 1974-1986, dean faculty agricultural science and ecology Germany, 1985-1986. Professor soil and aquatic microbiology University Giessen, 1986-2000.
Head Institute Applied Microbiology Justus-Liebig University, Giessen, 1986-2000, professor emeritus, since 2000. Visiting scientist International Rice Research Institute, The Philippines, 1980-1981.
Chairman-elect Lindach Kindergarten, Stuttgart-Stetten, 1976-1980. With Royal Dutch Army, 1955-1957. Member American Society Microbiology, International Society Soil Science (chairman commission soil biology, officer Executive Committee 1986-1990), German Society Soil Science (officer Executive Committee 1978-1986), Germany Society Ecology.
Married Helga Wohlgemuth, January 5, 1968. Children: Els Joke, Eric Aart.