This paper describes the major international agricultural information services, sources, and systems; outlines the existing information situation in Tanzania as it relates to problems of agricultural development; and reviews the improvements in information provision resources required to support the process of agricultural development in Tanzania. The types of information systems and services discussed include the Food and Agricultural Organization's (FAO) AGRIS and CARIS databases, the Commonwealth Agricultural Bureaux (CAB), a number of smaller international organizations, the U.S. National Technical Information Service (NTIS), and the U.S. National Agricultural Library. Local sources of research information in Tanzania are outlined, the need for an East African input center for AGRIS and the role of libraries in agricultural research are reviewed, and the need for a strengthening of national and international research and information infrastructures is discussed in detail. A 27-item reference list, a list of journals available from CAB, and a checklist on information infrastructure are included. (JL)