H. Borkowska1, R. Molas2, A. Kupczyk3
1Department of Crop Cultivation, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland
2Roman Molas, Jana Matejki 31, 20-430 Lublin, Poland
3Department of Production Engineering, Warsaw Agricultural University,
Nowoursynowska 159, 02-776 Warszawa, Poland
Pol. J. Environ. Stud. 2009;18(4):563–568