In the first year of research the degree of oil contamination
of soil was crucial for yields achieved and all other
investigated parameters. The largest number of plants
was recorded with the check treatment; a signifi cantly
smaller number of plants was recorded with treatments
4; 6; 7 and 8. This only confirms the presumption that the
effect of increased soil contaminant is the most adverse in
the emerging stage, which is when crops are established.
The plants which emerged with delay will go through all
stages of growth, but due to poorer establishment, yield
shall be lower. During the second and the third year of
research when winter barley and winter wheat respectively
were sown in the pots no such signifi cant diff erences
in crop establishment and yield achieved were recorded.
Expectedly, the best results were recorded with the check
soil treatment; crop establishment and yield achieved with
others, oil contaminated treatments were barely statistically
When soybean (cultivar: Sabina) was planted, the best
results were with check soil treatment, while crop establishment
and yield achieved with other treatments were
statistically lower than with the check treatment. The next
year (cultivar Dora) crop establishment with all treatments
was uniform and did not diff er statistically. Th ese investigations
have been planned as a five-year research and its
continuation shall help to clarify certain doubts.
It is not our intention to name any institution in particular;
however, we think that all those that wish and those
that should have as a goal to protect natural resources of
Croatia could consider joining this research to help preserve
our environment for generations to come.