1. Dep. of Agronomy, Faculty of Agriculture; Ataturk Univ.; 25240 Erzurum Turkey
2. Kelkit Aydın Doğan Vocational Training School, Gümüşhane Univ.; 29600 Gümüşhane Turkey
3. Dep. of Agronomy, Faculty of Seyrani Agriculture; Erciyes Univ.; Develi Kayseri Turkey
4. Erzurum Regional Directorate of Turkey Agricultural Credit Cooperatives; Erzurum Turkey