Öztekin Urla - Academia.edu (original) (raw)

Papers by Öztekin Urla

Selcuk Journal of Agricultural and Food Sciences

Barley (Hordeum vulgare L.) is one of the most important cereal crops that their grains are used ... more Barley (Hordeum vulgare L.) is one of the most important cereal crops that their grains are used in the malt and forage industry. Yield and quality losses occur in barley due to abiotic and biotic stress factors. Barley leaf diseases caused by fungal pathogens are common diseases leading to significant yield losses. Within the framework of environmentally-friendly integrated crop management, disease-resistant varieties should be developed together with a breeding program for sustainable agriculture. In disease resistance studies, the first and the most important step is to monitor the situation of the disease agent(s) in a region or country. For this purpose; In 2019-2020, barley leaf diseases survey in 54 barley fields was done in 5 provinces of Central Anatolia (Ankara, Eskişehir, Kırıkkale, Kırşehir, Yozgat). As a result of the surveys, the most common disease was determined as barley stripe disease (Drechslera graminea). Barley net spot disease (D. teres f. maculata, D. teres f....

Artvin Çoruh Üniversitesi Orman Fakültesi dergisi, 2015

The aim of this study was to determine plant nutrients content and to in terms of soil variables ... more The aim of this study was to determine plant nutrients content and to in terms of soil variables their soil database and generate maps of their distribution on agricultural land in Central and Eastern Black Sea Region using geographical information system (GIS). In this research, total 3400 soil samples (0-20 cm depth) were taken at 2.5 x 2.5 km grid points representing agricultural soils. Total nitrogen, extractable calcium, magnesium, sodium, boron, iron, copper, zinc and manganese contents were analysed in collected soil samples. Analysis results of these samples were classified and evaluated for deficiency, sufficiency or excess with respect to plant nutrients. Afterwards, in terms of GIS, a soil database and maps for current status of the study area were created by using inverse distance weighted (IDW) interpolation method. According to this research results, it was determined sufficient plant nutrient elements in terms of total nitrogen, extractable iron, copper and manganese in arable soils of Central and Eastern Blacksea Region while, extractable calcium, magnesium, sodium were found good and moderate level in 66.88%, 81.44% and 64.56% of total soil samples, respectively. In addition, insufficient boron and zinc concentration were found in 34.35% and 51.36% of soil samples, respectively

International Journal of Agricultural and Natural Sciences, 2012

Meralarımızın alanı konusundaki rakamlar tahminlere dayanmakta ve değişik kaynaklara göre büyük f... more Meralarımızın alanı konusundaki rakamlar tahminlere dayanmakta ve değişik kaynaklara göre büyük farklılıklar göstermektedir. Bu çalışma ile meraların durumlarına (kalitatif ve kantitatif özellikleri) göre mera sınıflarının tespit edilmesi ve her mera sınıfı için uygun ıslah ve amenajman yöntemlerinin belirlenmesi mümkün olmuştur. Bu çalışma ile oluşturulan veri tabanı güncelleştirmeye açık olup meralarımızın süreklilik içinde izlenmesine fırsat tanıyacak, böylece vakit kaybedilmeden gerekli önlemler alınıp yeni düzenlemeler uygulamaya konulabilecektir. Bu projede, meralar Nispeten Homojen Ekolojik Alan esasına göre sınıflandırılmıştır. Coğrafi Bilgi Sistemleri yardımıyla iklim, toprak ve topoğrafik haritalar çakıştırılarak homojen ekolojik alanlar belirlenmiş ve bu alanlar üzerinde alansal ağırlığa bağlı olarak belirlenen 3444 noktada vejetasyon ölçümleri yapılarak her bir Homojen Alan için vejetasyon tipleri ve mera durum sınıfı tespit edilmiştir. Vejetasyon sörvey verileri ISPD (Integrated System of Plant Dynamics) ve REDIS yazılımları ile analiz edilerek mera durum sınıfları belirlenmiştir. Ayrıca her bir örnekleme noktasından toprak örnekleri alınmış ve fiziksel ve kimyasal toprak özellikleri belirlenmiştir. Uydu Görüntüleri yer verileriyle çakıştırılıp bölgeler bazında meraların durum sınıflandırması ve haritalanması tamamlanmıştır. Meraların sınıflandırılması ve haritalanması için iklim verisi, yükseklik, eğim bakı gibi diğer ekolojik ve topoğrafik parametreler GIS ortamında kullanılmıştır. Bu proje ile meraların yapısal tanımlanması yapılmış, üretim potansiyellerinin belirlenmiş, sınıflandırılarak her bir homojen alan için ıslah ve bakım önerisi yapılmıştır.

Bu calismada, Nevsehir’de yapilan 31 adet mera vejetasyon etudune dayali olarak il meralarinin fl... more Bu calismada, Nevsehir’de yapilan 31 adet mera vejetasyon etudune dayali olarak il meralarinin floristik ozellikleri incelenmistir. Vejetasyon etudu tekerlek-nokta yontemiyle yapilmistir. Bu calisma sonuclarina gore 42 familya, 120 cins icinde 183 tur tespit edilmistir. Bitki turlerinin 25 tanesi endemik olarak bulunmustur. En yuksek ortus gosteren familyalar; Poaceae , Asteraceae , Lamiaceae ve Fabaceae familyalari olmustur. En yuksek ortus gosteren turler ise; Festuca valesiaca Schleicher Ex Gaudin, Poa bulbosa L., Bromus tomentellus Boiss. ve Thymus sipyleus Boiss. olmustur. F. valesiaca ve P. bulbosa turlerine 24 farkli durakta rastlanirken, Eryngium campestre L. ve T. sipyleus turlerine 23 farkli durakta rastlanmistir. Meralarda ortalama tur sayisi 27 olarak bulunmustur. Bitki turleri otlatmaya tepkisi bakimindan siniflandirilmis ve turlerin 8 tanesi azalici, 11 tanesi cogalici ve 164 tanesi istilaci olarak bulunmustur. Nevsehir ili mera alanlarinin floristik kompozisyon acisin...

Farming lands especially pistachio and olive growing areas in Gaziantep province were determined ... more Farming lands especially pistachio and olive growing areas in Gaziantep province were determined using geographic information systems and remote sensing techniques. With this aim satellite images of two different date covering Gaziantep province were analised with the help of ground truth information. Firstly three main class of agriculture, forest-rangeland and non agricultural lands were created. Then agricultural areas were further divided into cropland and horticultural lands. County based statistics were produced based on image classification.

Rangelands are basically one of the main feed resources for livestock. They are also important fo... more Rangelands are basically one of the main feed resources for livestock. They are also important for watershed functions, biodiversity, and recreation. It is necessary to be known rangelands current status for their improvement and management. For this reason vegetation survey was conducted on the rangelands of Kayseri Province in year 2009. A modified wheel point method with loop was used for vegetation survey in the 60 representative survey sites of rangelands in Kayseri province. The results of this survey indicated that vegetation cover was detected as 57.85 % . The cover rates of decreasers and increasers in botanical composition were 12.62 % and 19.98 %, respectively. The numbers of sites determined as good, fair, and poor conditions were 1, 29, and 30 , respectively. The 59 sites of total sites were identified as fair and poor in condition based on the rangeland condition classes. On the other hand, 26 sites were found as risky and 28 sites as unhealthy in health categories. Th...

Gulluk Korfezi, giderek artan kullanim baskilari altindadir. Korfezin mevcut durumu ve hangi kirl... more Gulluk Korfezi, giderek artan kullanim baskilari altindadir. Korfezin mevcut durumu ve hangi kirletici unsurlardan ne oranlarda etkiledigi tam olarak bilinmemektedir. 2000 yilinda yurutulen bu pilot calismada Mugla ili, Gulluk Korfezi`nde secilen ve koordinatlari kuresel konumlama sistemi (GPS) ile tespit edilmis 35 degisik noktadan toplanan deniz suyu orneklerinde bazi fiziksel ve kimyasal analizler yapilmis ve elde edilen sonuclar Cografi Bilgi Sistemleri (CBS) ve Uzaktan Algilama (UA) yontemleri kullanilarak yorumlanmistir.

Because of geographical conditions and suitable ecological conditions Turkey is one of the import... more Because of geographical conditions and suitable ecological conditions Turkey is one of the important cotton growers in the world. Determining the amount of cotton growing areas is important for economical planning and farm subsidies. With this project cotton growing areas of Şanliurfa, Gaziantep, Adiyaman, Kahramanmaras provincies were determined using remote sensing techniques in year 2000.

The aim of this study was to determine basic soil fertility properties of the agricultural lands ... more The aim of this study was to determine basic soil fertility properties of the agricultural lands inCentral and Eastern Black Sea Region and generate soil distribution maps using the Geographical Information System (GIS). In this research, a total of 3400 soil samples were taken at depths of 0-20 cm on a grid spacing of 2.5 x 2.5 km representing the agricultural soils of the region. Soiltexture, pH, electrical conductivity, lime content, organic matter content, available phosphorus andextractable potassium contents were analyzed in the collected soil samples. Analysis results of thesesamples were classified into certain criteria, and they were evaluated for deficiency, sufficiency or excess with respect to plant nutrients. Afterwards, soil fertility maps and a database for currentstatus of the study area were created using GIS techniques. According to the results of the study, thevast majority (75.30%) of agricultural soils in the Central and Eastern Black Sea Region containedloamy (medium textured) soils by general groupings, and their pH values were found to be highlyvariable (between <4.5-8.5). The vast majority of soils were identified as having the levels ofmedium-good-high in terms of organic matter and no salinity problem, and 61.15% of the soils hadlow lime content. Of the soils of the territory, 58.83% had phosphorus deficiency while 42.68% hadextractable potassium in sufficient levels

G aziantep Tarim il Mudurlugu ile isbirligi halinde yurutulen bu calismada CBS ve uzaktan algila... more G aziantep Tarim il Mudurlugu ile isbirligi halinde yurutulen bu calismada CBS ve uzaktan algilama teknikleri kullanilarak Gaziantep ilindeki tarim alanlarinin ozellikle ilde ekonomik onemi fazla olan antepfistigi ve zeytin alanlarinin miktari ve dagilimi belirlenmistir. Bu amacla Gaziantep ilini kaplayan farkli iki doneme ait uydu goruntuleri yer dogrulama verileri ile birlikte degerlendirilerek oncelikle ildeki tarim alani, orman-mera, ve tarim disi alan olmak uzere uc ana grupta toplanmistir. Daha sonra tarim alanlari icerisinde yogunlasilarak bu alandaki iki alt sinif tarla alanlari ve meyvelikler olarak tespit edilmistir. Goruntu siniflama sonucu elde edilen istatistikler il ve ilce bazinda verilmistir.

Areas that have similar elevation and climatic characters called as ecologically homogenous areas... more Areas that have similar elevation and climatic characters called as ecologically homogenous areas. It is assumed that differences in vegetation and crop productivity in these homogenous areas are due to changes in soil types and different management applications. Total evapotranspiration was calculated for 265 meteorological stations over Turkey from meteorological parameters such as temperature, relative h umidity, sunshine duration and wind speed using Penman-Monteith method. Point values of total evapotranspiration and total precipitation were interpolated using ANUSPLINE method. Drought index was calculated from these two parameters and classified into six classes. Elevation data was produced using SRTM digital elevation model and classified into seven classes. A total of 37 Homogenous area were obtained in Turkey by combining drought index layer with elevation layer.

Gulluk Bay have been under pressure by several kinds of land use. The current situation of the ba... more Gulluk Bay have been under pressure by several kinds of land use. The current situation of the bay and the impact of pollutants have not been known exactly. Consequently, the measurement and monitoring of pollutants have become a necessity. In this study, some physical and chemical analyses were conducted by using the water samples that were collected from 35 coordinated (fixed) points in Gulluk Bay. Coordinates were determined by Global Positioning System (GPS). The results were evaluated by Geographical Information Systems (GIS) and Remote Sensing (RS) methods .

Türk Tarım ve Doğa Bilimleri Dergisi, 2019

Rangeland improvement and management have recently become more important that many new projects h... more Rangeland improvement and management have recently become more important that many new projects have been also initiated and conducted throughout Turkey. There is a great responsible for the provinces in the Central Anatolia Region on those implementation projects. In this framework, this study was designed that could contain vegetation surveys in representative sites for rangelands of Kırşehir province in 2008 year, at the same time their assessment, and conclusion were also performed too. The 36 rangeland sites were surveyed with the modified-loop method. The results of vegetation surveys were analyzed and determined rangeland condition and health classes for each sites. The vegetation cover was measured as 65.35%. The rates of decreasers and increasers cover were 11.54% and 35.26%, respectively. The studied sites numbers were one, 30 and 5 for good, fair, and poor conditions, respectively. The 35 sites of total sites were identified as fair and poor in condition based on the rang...

Tarla Bitkileri Merkez Araştırma Enstitüsü Dergisi, 2017

Toprak Su Dergisi, 2017

Bu çalışmada Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK) tarafından desteklenen "Ul... more Bu çalışmada Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK) tarafından desteklenen "Ulusal Mera Kullanım ve Yönetim Projesi" kapsamında ülkemiz genelinde 48 ilde yürütülen çalışmanın Eskişehir ili meralarında 142 alandan 0-25 cm derinlikten alınan toprak örneklerinin fiziksel ve kimyasal analizleri sonucunda meraların azot(N) ve fosfor (P 2 O 5 ) gübre gereksinimleri tespit edilmiştir.

Tarla Bitkileri Merkez Araştırma Enstitüsü Dergisi, 2014

Rangelands are actually known as feed resources for animals. At the same time they have potential... more Rangelands are actually known as feed resources for animals. At the same time they have potential resources for multiple-uses such as water source, rich of flora and fauna, and recreation areas. They should be carefully used and conserved for their optimum benefits of long term. Deterioration and degradation process have still continued due to mismanagement of rangelands. Present range status should be reversed with good management practices. For this reason, field works were conducted on the rangelands of Sivas Province in years of 2008, 2009 and 2010. A modified wheel point method with loop was used for vegetation survey in the 103 representative study sites of rangelands in Sivas province. The results of this study indicated that vegetation cover was quantified as 60.68%. The cover rates of decreasers and increasers were 15.53% and 22.23%, respectively. The studied sites numbers were 6, 62, and 35 for good, fair, and poor conditions, respectively. The 97 sites of total sites were identified as fair and poor in condition based on the rangeland condition classes. On the other hand, 26 sites were found at healthy, 35 sites at risky and 42 sites at unhealthy in rangeland health categories. Total site number of the last two classes was 77. Study results indicate that rangelands are also in slow degradation trend and high potential for having been successively reversed to the climax situation with proper restoration and management practices for rangelands.

Tarla Bitkileri Merkez Araştırma Enstitüsü Dergisi, 2015

Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi, 2016

Bu araştırma, Orta ve Doğu Karadeniz Bölgesi tarım topraklarının bazı bitki besin maddesi kapsaml... more Bu araştırma, Orta ve Doğu Karadeniz Bölgesi tarım topraklarının bazı bitki besin maddesi kapsamlarını belirlemek, coğrafi bilgi sistemleri (CBS) kullanılarak ele alınan toprak değişkenleri yönünden veri tabanı ve dağılım haritalarını oluşturmak amacıyla yürütülmüştür. Araştırma kapsamında, tarım alanlarını temsil edecek şekilde 2.5 x 2.5 km grid aralıklarla 0-20 cm toprak derinliğinden toplam 3400 adet toprak örneği alınmıştır. Alınan toprak örneklerinde; toplam azot (N), ekstrakte edilebilir kalsiyum (Ca), magnezyum (Mg), sodyum (Na), bor (B), demir (Fe), bakır (Cu), çinko (Zn) ve mangan (Mn) analizleri yapılmıştır. Toprak analiz sonuçları, belli kriterlere göre sınıflandırılarak, besin maddelerinin eksiklik, yeterlilik veya fazlalık seviyeleri belirlenmiştir. Toprak parametrelerinin sınıflandırılmasından sonra CBS kapsamında veri tabanı oluşturulmuş ve ters mesafe ağırlık yöntemi (IDW, Inverse Distance Weighted) kullanılarak toprak dağılım haritaları üretilmiştir. Araştırma sonucuna göre, Orta ve Doğu Karadeniz Bölgesi tarım topraklarının büyük çoğunluğunun toplam N, ekstrakte edilebilir Fe, Cu ve Mn yönünden yeterli durumda olduğu; analiz edilen toprak örneklerinin % 66.88'inde ekstrakte edilebilir Ca ve % 81.44'ünde ekstrakte edilebilir Mg'un iyi, % 64.56'sında ekstrakte edilebilir Na'un ise orta seviyede olduğu belirlenmiştir. Bölge topraklarının % 34.35'inde B ve % 51.36'sında Zn noksanlığı görülmektedir. Anahtar kelimeler: Makro element, mikro element, toprak veri tabanı, CBS