1. Department of Horticulture, Faculty of Agriculture, Ondokuz Mayis University, Samsun, Turkey
2. Department of Horticulture, Faculty of Agriculture, Ordu University, Ordu, Turkey
3. Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Ondokuz Mayıs University, Samsun, Turkey
4. Akkus Vocational High School, Ordu University, Ordu, Turkey