[1] Federal Agricultural Research Center,
[2] Institute for Soil Biology,undefined
[3] Bundesallee 50,undefined
[4] D-38116 Braunschweig,undefined
[5] Germany Tel.: +49 (0) 531 596 342 Fax: +49 (0) 531 595 375 e-mail: rosenbrock@bb.fal.de,undefined
[6] GSF-National Research Center for Environment and Health,undefined
[7] Institute for Soil Ecology,undefined
[8] Ingolstädter Landstrasse 1,undefined
[9] D-85764 Neuherberg near Munich,undefined
[10] Germany,undefined