Because of their being science-based and because they have sparked off an extended debate on how technologies are conceived and developed, biotechnologies represent a particularly useful point of departure for a more general discussion about the evolution of agricultural techniques, as regards the origin and the distinguishing characteristics of different forms of knowledge and know-how. This article seeks to discuss how “knowledge” from different sources (agricultural, industrial, and scientific) on the one hand, and how the abstract and concrete elements that enter into the knowledge acquisition process, on the other hand, come together and become linked as determinants of different technical paths of development. The growing recourse to biotechnologies tends progressively to modify the common knowledge base mobilized for agro-food production. Even though at present the development of biotechnologies seems to be set in a model of continuity in relation to the current techniques, their full potential could express itself in redefining the relations between Man and Nature, ultimately reconciling the production of agricultural consumer goods and the reproduction of the agro-ecosystems. Copyright Kluwer Academic Publishers 1993
