1. Faculty of Agriculture, Ege Univ., 35100 Izmir, Turkey.
2. Associate Professor, Faculty of Agriculture, Ege Univ., 35100 Izmir, Turkey.
3. Research Assistant, Provincial Special Administration, Dept. of Agricultural Services, İzmir–Turkey, Turkey.
4. Professor, Faculty of Agriculture, Ege Univ., 35100 Izmir, Turkey.