A1 - Śmietanka, Maria PB - Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute L1 - http://journals.pan.pl/Content/90114/mainfile.pdf L2 - http://journals.pan.pl/Content/90114 PY - 2014 IS - No 21 T1 - The Influence of Permanent Grasslands on Nitrate Nitrogen Loads in Modelling Approach UR - http://journals.pan.pl/dlibra/publication/edition/90114 T2 - Journal of Water and Land Development