Effekte unterschiedlicher Systeme der Grundbodenbearbeitung auf Erträge und Beikraut im Dauerfeldversuch Gladbacherhof

Summary

An organic long-term-field experiment with two factors has been carried out since
1998 at the experimental station Gladbacherhof, University of Giessen. Effects of
different crop rotations combined with tillage treatments (mouldboard plough, twolayer-
plough and tillage without plough) on plants, soil and weeds have been
investigated. This article presents results on cash crop yields and weeds according to
soil tillage. It can be concluded that, as for the yields, reduced tillage systems could
cope with the regularly ploughed reference system if at least a shallow soil inversion
was carried out. Concerning the lower yields in the soil tillage system without
ploughing the impact of nutrient availability seems to be more important than the
competition by weeds.