{Project} Optimierung des biologischen Gemüsebaus durch Gründüngung und Fruchtfolge. [Optimization of organic vegetable production by use of greenmanure and crop rotation.] Runs 2003 - 2005. Project Leader(s): Koller, Martin and Mäder, Paul, Research Institute of Organic Agriculture (FiBL), CH-5070 Frick. More information online at >.