Home Publications & Data Journal Article Foliar nutrient testing with the diagnosis and recommendation integrated system (DRIS) for beans author(s) Wortmann, Charles S. published in1993 regions Uganda Tanzania Rwanda original file download full citation Wortmann, Charles S. 1993. Foliar nutrient testing with the diagnosis and recommendation integrated system (DRIS) for beans. Bean Improvement Cooperative. Annual Report (USA). 36:91-92.