Bachelor of Science, University Nebraska, 1953; Master of Sciences, University Nebraska, 1957; Doctor of Philosophy, University Hawaii, 1961.
Graduate assistant, U. Hawaii, Honolulu, 1958-1960; instructor, U. Hawaii, Honolulu, 1960-1961; assistant professor, U. Hawaii, Honolulu, 1961-1965; associate professor, U. Hawaii, Honolulu, 1965-1970; professor, U. Hawaii, Honolulu, 1970-1980; Ford Foundation senior agricultural consultant, Egypt-Aswan Agricultural Development, 1965; chief soil and water management division Office Agriculture, Agency for International Development, 1973-1976; deputy executive director, Board International Food and Agricultural Development, Washington, 1978-1979; chief agricultural and rural development division Asia bureau, Agency for International Development, 1979-1980; science advisor consultative group on international agricultural research World Bank, Agency for International Development, since 1980. Consultant in field.
Served to First lieutenant United States Army, 1953-1955. Fellow American Association for the Advancement of Science, American Society Agronomy, Soil Science Society American, Crop Science Society American. Member International Society Tropical Root Crops (honorary life, president 1976-1979,79-83), Asian Pacific Weed Science Society (secretary 1969-1970), 73-81), Indian Society Root Crops, Society for Economics Botany, Hawaiian Academy Science.
Married Ida Sue Richards, May 14, 1955. Children— Karen, Roy, Duane.