Yazar "Unakitan, G." seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe A Partial Equilibrium Analysis of Sunflower Market in Turkey(Univ Namik Kemal, 2006) Unakitan, G.; Miran, B.Sunflower oil is the most preferred vegetable oil in Turkey. 35% of total consumption of vegetable oil is sunflower oil. Sunflower seed import is approximately 500-650 thousand tons while sunflower seed production is 800-850 thousand tons in the last years. The main objective of this study is to determine the reasons of deficiency of vegetable oil in Turkey and to suggest some solutions. For this objective, the prospective situation and the market structure of sunflower seed in Turkey has estimated. One product partial equilibrium analysis has been used to estimate the future market structure of sunflower seed. A simulation model from 2003 to 2015 has been created with partial equilibrium analysis. Turkey is a net importer of vegetable oils. Sunflower seed import is approximately 300 thousand tons while crude oil import is approximately 180 thousand tons in 2002. According to the results of simulation model, Turkey will continue to be a net importer for sunflower and other oil seeds. It has been estimated that the sunflower seed import will be approximately 1 million tons and crude oil import will be approximately 400 thousand tons at end of the simulation period (2003-2015).Öğe The Structure and Fundamental Problems of Vegetable Oil Industry in Turkey(Univ Namik Kemal, 2006) Inan, I. H.; Kubas, A.; Gaytancioglu, O.; Azabagaoglu, M. O.; Unakitan, G.There are 167 oil factories in Turkey, with a capacity not only to meet Turkey's domestic demand but also for export purpose. Of these, 8 are concerned with the production and the marketing of margarine, while the others process unrefined and refined oil. In Turkey, the vegetable oil industry has a capacity about 6 million tons of seed grounding and 3 million tons of unrefined oil capacity. In addition, there is also a 950 thousand tons capacity for margarine production. However, the insufficiency of unrefined material has resulted low level capacity usage. For example, the capacity usage was realized as 50% for seed grounding, 47% for unrefined oil production and 40% for margarine production. In this research, the various problems such as quality of unrefined material, finance, storage, etc faced by the vegetable oil industry, from the supliance of unrefined material to domestic and international marketing have been investigated. This study was carried out thoroughly in Turkey for aiming to identify measurements in order to vegetable oil industry could operate near to full capacity.Öğe Technical Efficiency of Sunflower Production in Trakya Region by DEA(Univ Namik Kemal, 2006) Gunden, C.; Miran, B.; Unakitan, G.The objective of this paper is to determine how efficiently the resources are used in sunflower production in Turkey. The data used in efficiency measurements covers the provinces Tekirdag, Kirklareli and Edirne in Trakya region which is the most important area of sunflower seed production. The production area of sunflower is about 307 thousand hectares, 57% of total sunflower sown area in Turkey and the amount of production is 498 thousand metric tons, 62% of the total sunflower production. 197 farmers were interviewed face to face to obtain the data. Efficiency measurements are made by means of the Data Envelopment Analysis (DEA) with respect to constant return to scale for each province. The Efficiency scores is decomposed into pure technical efficiency and scale efficiency for getting more information from the measurements. Total sunflower production (kg) is used as the output and land (decar); labour (hour), tractor use (hour), nitrogen fertilizer use (kg), seed use (kg) and pesticide (kg) are considered as the main inputs. Average technical efficiency score covering all the provinces is estimated as 0.672. Although none of the provinces produces sunflower efficiently, Tekirdag province is relatively more successful in input use. Tekirdag province has the highest pure technical efficiency and scale efficiency score. Considering all the regions, the reason for inefficiency is not optimal production but not producing a certain output with minimum input. Yield is a factor that increases efficiency.Öğe Tractor demand projection in Turkey(Academic Press Inc Elsevier Science, 2007) Unakitan, G.; Akdemir, B.An autoregressive integrated moving average (ARIMA) univariate model was used to predict the previous tractor demand in Turkey. The data used in the model were obtained for the period 1961-2003 from FAO statistics. The ARIMA model was determined as (2, 2, 2) in order to predict tractor demand by using logarithmic transformation. The trend of the tractor stock was calculated by using coefficients of the model for 2004-2015. According to the model result, the demand may vary between 13,000 and 15,000 tractors per year, with an accumulated stock of 1.183 million by 2015. (C) 2007 IAgrE. All rights reserved. Published by Elsevier Ltd
