The aim of the present study was to investigate the impacts of different tillage intensity
on the quantity of soil organic matter in topsoils of seven long-term trials. Tillage
intensity was found to affect both bulk density and Ct-contents, whereas total C
quantity did not differ significantly between tillage treatments in all trials even though a
high C accumulation in the reduced tillage system was visible in one trial. As for
humus balancing, a consideration of tillage intensity is not supported by these results