Over the two-year study (2008–2009) we monitored the influence of integrated and conventional

production systems on microbiological activity in soil and strawberry yield. The experiment also involved

fertilizers applied in three variants of treatment. The studied parameters were monitored over 2008 and 2009 by

determining the total number of soil microorganisms, the number of ammonifying bacteria and the strawberry

yield. The results of the study suggest the pronounced inhibitory effect of insecticides on number of studied

microorganism groups in all three conventionally treated variants, over the both years of study, which further

infers negligible stimulative influence of strawberry plants on yield.