Professor, horticulture; associated faculty, Nelson Institute and Center for Integrated Agricultural Systems
Propagation, breeding, growth and production of woody perennial horticultural crops including fruits and ornamentals (shrubs and trees)
Professor emeritus, plant pathology; director, Wisconsin Fast Plants Program and Rapid Cycling Brassica Collection
Use of special plants as teaching vehicles in school and college, and in plants for research.
Distinguished faculty associate, botany
Expert on greenhouse, botanical garden and selected plants for teaching