Agriculture must evolve into a more environmentally-friendly approach while remaining economically workable and socialy interesting, which is necessary so that the process can be pursued on the long term, i.e that the process is sustainable (Brundland 1987). This type of agriculture is said to be sustainable. It has a systemic logic and therefore requires a strong knowledge base, and in this study we propose a knowledge management computing tool. In the first part of our article, we discuss the potential actors of the tool and their possible implications. The second part deals with its contents, selection and form.