Olsen et al., 2000. Anim. Sci., 70: 451-456 Document reference Olsen, A. W. ; Vestergaard, E. M. ; Dybkjaer, L., 2000. Roughage as additional rooting substrates for pigs. Anim. Sci., 70: 451-456Web http://www.cabdirect.org/abstracts/20002216336.htmlCitation key Olsen et al., 2000Datasheets Common vetch (Vicia sativa)White lupin (Lupinus albus) seedsOat forage