@ARTICLE{Terelak_Henryk_Trace_2001,
 author={Terelak, Henryk and Tujaka, Arkadiusz and Motowicka-Terelak, Teresa},
 volume={vol. 27},
 number={No 4},
 pages={159-174},
 journal={Archives of Environmental Protection},
 howpublished={online},
 year={2001},
 publisher={Polish Academy of Sciences},
 abstract={The research system of soils for evaluation of the ecological state of farm-land soils in Poland is presented in this paper. Granulometrie composition, pH, organic matter content and the content of heavy metals (Cd, Cu, Ni, Pb, Zn) in soils were determined. On the basis of existing criteria (tab. 1) the state of soil pollution with heavy metals for separate provinces and whole country was estimated. The average heavy metal contents (mg/kg) in surface layer of soils in Poland are as follows: Cd-0.21, Cu-6.5, Ni-6.2, Pb-13.6, and Zn-32.4. The farm-land soils of Poland generally contain natural and slightly elevated level of the investigated heavy metals. This allows to produce high quality of agricultural materials appropriate for consumption and feeding of animals.},
 type={Article},
 title={Trace Element Content (Cd, Cu, Ni, Pb, Zn) in Farm-Land Soils in Poland},
 URL={http://www.czasopisma.pan.pl/Content/124047/PDF/12_AE_VOL_27_4_2001_Terelak_Trace.pdf},
 keywords={soils, heavy metals, soil pollution},
}