The study makes an attempt to assess the impact of uncontrolled waste dumps on soil chemical and biochemical properties. Investigations were carried out on five waste disposal sites situated in the south-eastern outskirts or the city of Lublin. The samples of soils collected from the adjacent arabic land were used as reference material. In soils of four landfills, which were established relatively recently (lour to five years ago); several times higher activity of the examined enzymes (dehydrogcnascs, acid phosphatase, basic phosphatase, urcasc, protease) than in the soils from the adjacent cultivated land was determined. Opposite ti-ends were found in the case ofa waste dump established 20 years ago. The determined lack ofnegative influence or the examined waste dumps on the soil chemical and biochemical properties of the adjacent arabic land shows that the range or the contamination effect on the surrounding area was limited.

The paper presents characterisation of the eco-chemical condition and potential threats to soils of goose farms on the basis of recent monitoring of a 15-year measuring cycle. It was demonstrated that the observed soil enzymatic inactivation progressing with years of investigations on the examined farms was significantly associated with a very high content of mineral nitrogen and available forms of phosphorus. A distinct tendency towards increased content of heavy metals in soils derived from these farms as well as in their direct neighbourhood observed with the passage of time poses a serious hazard to the environment

Badano wpływ osadu ściekowego na aktywność enzymatyczną pokrywy glebowej na terenie po otworowej kopalni siarki w celu oceny możliwości jego wykorzystania w leśno-łąkowej rekultywacji terenów Kopalni Siarki "Jeziórko". Wyniki, uzyskane po sześciu latach od zastosowanych zabiegów rekultywacyjnych wskazują, że osad ściekowy, dodany w odpowiedniej dawce, wpływał na ogól korzystnie na właściwości biochemiczne i chemiczne gleby. Oznacza to, że zastosowany osad może być brany pod uwagę, jako jeden ze środków służących do rekultywacji gruntów toksycznych.