Optimising organic farming systems: nitrogen dynamics and long-term soil fertility in arable and vegetable production systems in the Netherlands

Chris J. Koopmans, Jan G. Bokhorst. 2000. Optimising organic farming systems: nitrogen dynamics and long-term soil fertility in arable and vegetable production systems in the Netherlands. 13th IFOAM Scientific Conference. IFOAM, Basel, Switserland. 13