1 | Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, P.O. Box 201, 20-290 Lublin 27, Poland |
2 | Institute of Soil Science and Photosyntesis, Russian Academy of Sciences, 142-292, Pushchino, Russia |
3 | Technical University of Lublin, Department of Environment Protection and Engineering, Nabystrzycka 40, 20-618 Lublin, Poland |