The last 25 years has seen a paradigm shift in the understanding of the nature of knowledge and how it is
exchanged in the agricultural context. A changing backdrop, with the move towards multi-functional land
management, persistent environmental problems and the search for sustainable agricultural approaches, has
brought new challenges. At the same time the research agenda on knowledge has changed as an era of
positivism, during which science and scientific experts were given unrivalled authority, was challenged by
social studies of science that began to question the superiority of scientific knowledge, and value alternative
forms of knowledge such as those held by farmers. Theory and practice of knowledge exchange in agriculture
has evolved in line with this, shifting from a linear model of knowledge transfer to a perspective that
integrates knowledge from multiple actors through facilitation and participation and emphasises learning in a
social context