J. Siepak1, B. Walna2, S. Drzymala3
1Adam Mickiewicz University, Water and Soil Analysis Department, Drzymaly 24, Poznan, Poland
2Adam Mickiewicz University, Jeziory Ecological Station , Mosina, p.box 40, Poland
3Agricultural University of Poznan, Soil Science Department, Mazowiecka 42, Poznan, Poland
Pol. J. Environ. Stud. 1999;8(1):55–58