FARMING AND RURAL SYSTEMS RESAERCH AND EXTENSION European Farming and Society in Search of a New Social Contract – Learning to Manage Change (Pre)Proceedings of the 6 th European IFSA Symposium Coordinated by Artur Cristóvão With the collaboration of Bernard Hubert David Gibbon Donato Romano Geir Lieblein Herman van Keulen Jacques Baudry Jacques Brossier Luigi Omodei Zorini Peter Zander Tommy Dalgaard Abril, 2004