This paper presents a methodological model for the establishment of Open Access to scientific information at Embrapa, as a strategy for scientific information and knowledge management. The model consists of elements that speed up scientific communication processes and allow for the research output management. The aim is to provide the necessary mechanisms to capture, store, organize, preserve and widely disseminate the scientific knowledge produced by Embrapa and by the scientific community involved in agricultural research, through the implementation of the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). It is our contention that effective information management improves institutional scientific communication, which contributes for the betterment of scientific research related processes.