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In Turkey, which ranks the tenth country worldwide in the sunflower ( Helianthus annuus  L . ) production, 60% of the production is carried out in the Thrace region. Therefore agricultural enterprises in Thrace, situated in the European part of Turkey, have become masters in producing sunflower, and have become the centre of vegetable oil industry in the region owing to the produced raw material.

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EVALUATION OF THE CHANGES IN THE COST FACTORS OF SUNFLOWER PRODUCED IN THRACE ON THE BASIS OF THE PROVINCES IN THE RESEARCH FIELD AND OF THE SIZES OF ENTERPRISE