Scholars have recognized the importance of local and indigenousknowledge in less industrialized countries. Few studies havebeen done on the diversity of knowledge communities in moreindustrialized countries, however, because of researcherassumptions about the spatial and temporal dimensions of localand scientific knowledge. A distinguishing feature of knowledgecommunities is the way that time and space are perceived. Thesedifferences are reflected in farmers' decision-making.Depending on farmers' knowledge orientations, they may utilizequite different criteria to determine the reliability andapplicability of new information. Advocates of sustainableagriculture, and (...) proponents of on-farm research will benefit byrecognizing the diverse ways that farmers know and understandtheir farming systems in both less and more industrializedcountries. (shrink)