{Facility} DOK: DOK-Langzeit-Versuch. [DOK long term experiment.] Facility Leader(s): Mäder, Paul, Forschungsinstitut für biologischen Landbau (FiBL), CH-5070 Frick. More information online at <http://www.fibl.org/forschung/anbautechnik-einjaehrig/dok/index.php>.