Browsing by Author "Guzel, Deniz Ugur"

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Development of a Spatial Decision Support System (Sdss) for Grape Cultivation by Using a Geographical Information System (Gis): Çatak (Turkey) Example
(Springer, 2024) Guzel, Deniz Ugur; Dogan, Adnan; Uyak, Cuneyt
This study aims to develop a spatial decision support system (SDSS) by evaluating climate, soil, and topography factors together with the help of a Geographical Information System (GIS) and by using this modelled SDSS to determine the potentially suitable areas where grape varieties with different ripening levels within the study area (& Ccedil;atak, Turkey) can be grown. The study was carried out in the & Ccedil;atak district, located in the south of Lake Van, between 4080000 and 4240000 north latitudes and 300000 and 370000 east longitudes (UTM WGS84) in eastern Turkey in 2021-2022. In the study, some important individual factors for vine growing such as the effect of heat summation (EHS), number of frost-free days, minimum winter temperature, aspect, slope, soil depth, and land use capability were evaluated using the GIS and weighted notation ratio result method, and based on this, a suitability analysis was carried out. It was determined that the distributions of the study area for first, second, and third suitability levels, respectively, were 0.72-26.05-52.50% for the earliest variety, 4.58-33.84-48.28% for the early variety, 1.15-22.56-58.47% for the mid-early varieties, 3.95-20.52-49.07% for the mid-season varieties, and 1.18-13.20-44.61% for the late variety. It was seen that the variables and the modelling used were effective in determining suitable areas for grape cultivation.
Relationships Between Physical and Chemical Properties With Stoma Properties in Some Local Grape Varieties (Vitis Vinifera L.)
(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2022) Arslan, Tuncer; Dogan, Adnan; Uyak, Cuneyt; Guzel, Deniz Ugur
The aim of this study was to determine the stoma densities and sizes of 12 local grape varieties grown in Yuksekova (Hakkari) province, as well as to determine the relationships between stomatal properties with physical and chemical properties. In order to determine stoma properties, leaf samples were taken from 4-5 th nodes of the summer shoots of each variety and stoma densities and sizes were determined by nail polish method from different parts of the leaf surface (bottom, middle, tip). It was determined that stoma densities were between 166.13-247.12 pcs mm(2), stoma lengths were between 22.63-27.88 mu m, and stoma widths were between 14.59-19.00 mu m. A significant positive correlation was found between stoma density with leaf size and cluster weight, and a significant negative correlation was found between stoma density with soluble solids content in grapes.