1. Faculty of Agriculture, University of Life Sciences “King Mihai I” from Timisoara, 300645 Timisoara, Romania
2. Department of Agronomy, Faculty of Agriculture and Biotechnology, Bydgoszcz University of Science and Technology, Al. Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
3. Faculty of Management and Rural Tourism, University of Life Sciences “King Mihai I” from Timisoara, 300645 Timisoara, Romania