Use of catch crops as green manures significantly increased soil
enzyme activities during the growing period of following main crops.
Such biologicalimpactsof FP andORappearedto besimilar andtherefore
they both were suitable for increasing the biological activity of soil as
evaluated by enzymatic activities. As different tendencies were shown
for the soil studied chemical properties as influenced by the catch crop
treatments, it is not possible to make any conclusive statements on
their status within the three experimental years