Cultivating the future based on science : proceedings of the second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 - 20 June 2008 in Modena, Italy. 2. Livestock, socio-economy and cross disciplinary research in organic agriculture, Band 2