Effects of cold stratification pretreatment and pH level on germination of Centaurea tchihatcheffii Fisch. et Mey. seeds
YeÅŸim Okay1*, Asli Günöz2 and Khalid Mahmood Khawar3
1Department of Horticulture, Faculty of Agriculture, University of Ankara, 06110 DiÅŸkapi, Ankara, Turkey.
2Projects and Statistics Section, Ankara Provincial Directorate of Agriculture, Turkish Republic Ministry of Agriculture and Rural Affairs, 06500 Yenimahalle, Ankara, Turkey.
3Agricultural Biotechnology Section, Department of Field Crops, Faculty of Agriculture, University of Ankara, 06110 DiÅŸkapi, Ankara, Turkey.
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