Hakan YILDIZ

Hakan YILDIZ
Toprak Gübre ve Su Kaynakları Merkez Araştırma Enstitüsü · GIS&RS

PhD

About

59
Publications
26,358
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
390
Citations
Additional affiliations
January 2021 - present
Toprak Gübre ve Su Kaynakları Merkez Araştırma Enstitüsü
Position
  • Researcher
March 1998 - April 2016
Central Research Institute for Field Crops
Position
  • Head of Department

Publications

Publications (59)
Data
Current Bulletin-In Turkish (We have contributed). This bulletin is published open access by the related Institute (Ankara Soil Fertilizer and Water Resources Central Research Institute) for some months. (https://arastirma.tarimorman.gov.tr/toprakgubre/Belgeler/Tarımsal Ürün İzleme ve Verim Tahmin Bülteni/Nisan 2024 Tarımsal Ürün İzleme ve Verim T...
Article
Full-text available
In this study, yield prediction was made for Tosunbey and Bayraktar bread wheat varieties under rainfall conditions and 4 different fertilizer ratios with AquaCrop model, one of the plant growth models. In this experiment conducted at Haymana Ikizce Research Farm, actual field observations and model predicted grain yield, biomass, and green area co...
Article
Full-text available
Water efficiency models are playing an increasingly important role in helping agricultural activities adapt to climate change. AquaCrop is one of the models that can accurately correlate water-plant-climate parameters. In this study, the effects of irrigation strategies (I1; rainfed, I2; irrigation at Germination (G)+Tillering (T)+Heading (H) stage...
Article
Full-text available
Product simulation programs with DSSAT are based on the principle of predicting the potentials of yield and other phenological parameters of wheat varieties with different fertilizer application doses in different climatic and soil conditions. For this purpose, different wheat varieties (Bayraktar, Tosunbey) were used in order to test the use of th...
Article
Full-text available
Plant health and plant density can be monitored through indices values calculated from reflectance charateristics of plants. This study aims to investigate the effects of different rates of nitrogen fertilizer on spectral reflectance characteristics of dryland winter wheat and to determine and select the most reliable vegetation indices for Nitroge...
Article
Full-text available
Early crop yield estimates could provide up-to-date information on supply, demand, stocks, and export availability through which governing bodies can make better agricultural management plans. This study aims to develop a yield model estimating pre-harvest winter wheat yield at both tillering and flowering stages using a multiple linear regression...
Conference Paper
Full-text available
Leaf Area Index (LAI) is one of the most important parameters used in evaluating plant conditions and drought severity. Especially in arid regions, it is important to know the leaf area index in order to show the spatial variation in canopy and rainfall. In the study, spectral reflectance values were measured at different wave lengths by using hand...
Article
Full-text available
Bu çalışmada dallı darının ekolojik istekleri doğrultusunda belirlenen parametrelerin coğrafi katmanlarının oluşturulması, Analitik Hiyerarşi Süreci yöntemi ile bu parametrelerin önceliklerinin belirlenmesi ve Coğrafi Bilgi Sistemleri teknikleri ile işlenerek dallı darının potansiyel uygunluk haritasının elde edilmesi amaçlanmıştır. Girdi olarak Me...
Poster
Full-text available
NDVI Zaman serisiİ Görüntülerinde Değişkenliğin İzlenmesi
Article
Full-text available
Poor management, low vegetation cover, and severe erosion are undermining the stability and sustainability of lands. In this study, modified Mediterranean Desertification and Land Use (MEDALUS) method was used to identify environmentally sensitive areas (ESA) to desertification in Tigris Basin, Turkey. Soil samplings (0–20 cm) and field observation...
Article
Hyperspectral band, spectroradiometer, vegetation index, remote sensing, wheat, leaf area index (LAI), fertilization
Article
Full-text available
Economic life of the Tigris basin, part of the Mesopotamian depends heavily on agricultural production for thousands of years. Sustainability of agricultural production in this ancient region may only be possible by conserving and improving the ability of soils to function. Therefore, soil quality indexes were computed to evaluate and monitor funct...
Conference Paper
Full-text available
Globalization have improved trade activities across the continents however, created several serious problems. Rapid spread and establishment of invasive alien species (IAS) through global trade are important issue being addressed globally. European Union, recently agreed to increase the number of IAS of concern. Turkey, on the other hand have made...
Conference Paper
Full-text available
Although farming techniques have developed in late years, climate will be unquestionably one of the main factors affecting agricultural production significantly. There have been excessive fluctuations in agricultural production due to temporal and spatial changes of meteorological factors. Normalized Difference Vegetation Index (NDVI) data obtained...
Conference Paper
Full-text available
Common ragweed (Ambrosia artemisiifolia L.) is noxious invader causing severe pollen allergies. Ragweed has extended its range over a considerable portion of the Turkey after its first record in 1998. Ragweed infestation in agricultural areas (particularly in sunflower fields) has recently been reported. The plant has become a detrimental threat to...
Conference Paper
Full-text available
The distribution range of invasive plants provide an overview of the invasion success at a given time and space. However, current distribution data are generally scarce at regional and landscape scales. Prediction of potential distribution ranges of invasive plants through niche-based models using available distribution data, climate requirements o...
Conference Paper
Full-text available
The increasing number of Invasive Alien Species (IAS) pose sever threats to natural ecosystems, agricultural lands, biodiversity and human health throughout the world. Early Detection, Monitoring and Information Systems (EDMIS) play a key role in reporting the new species at regional scales. This study deals with the development of monitoring and i...
Article
Full-text available
Improvement and management of rangelands are highly important to sustain and maintain for nowadays and next generations. The first step in vegetation studies is to determine its current vegetation status. For this reason vegetation surveys were performed on the rangelands of Kirikkale-Akcaagac village and Sivas-Celebiler village in 2008. A modified...
Article
Full-text available
The aim of this study was to determine basic soil fertility properties of the agricultural lands in Central 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 th...
Conference Paper
Full-text available
Climate is one of the most important factors affecting agricultural production which is under the influence of climatic factors such as rainfall, rainfall distribution and temperature during the year. Many methods have been developed for crop monitoring and yield forecast using climatic data for recent decades. Statistical approach, crop simulation...
Conference Paper
The study was carried out on natural rangeland areas of Central Anatolia Region of Turkey. The objective of this study is to monitor seasonal changes on rangeland vegetation by remote sensing data. Spectral reflectance of plants changes over time based on their phenological period. Differences in topography and climatical factors affect plant pheno...
Article
Full-text available
In this study, floristic features of Cankiri rangelands were observed on the basis of 41 vegetation surveys in the rangelands of Cankiri province. Vegetation surveys were performed with wheel-point method. As a result of this study, identification of the specimens revealed that the presence of 327 taxa belonging to 187 genera of 46 families. In cov...
Article
Full-text available
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 mism...
Article
Full-text available
Genis alanlari kapsayan meralarin daha etkin ve ekonomik yonetimi icin yeni yontemlerin gelistirilmesine gereksinim duyulmaktadir.Uydu verilerinden elde edilen normallestirilmis fark bitki indeksi (NDVI) verisi mera vejetasyonunun zamana bagli olarak izlenmesine olanak verir. Yukselti vejetasyon gelisimini etkileyen onemli faktorlerden birisi oldug...
Article
Full-text available
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 mism...
Article
Full-text available
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 modifi...
Conference Paper
Full-text available
Amaç: Bu çalışma ile İç Anadolu bölgesindeki dokuz ilde, mera olarak kullanılan bozkırlarda tür çeşitliliği ve en sık rastlanan türlerin durumu sayısal olarak tespit edilmiştir. Çalışmanın önemi, böyle detaylı sayısal verilerin ilk defa elde edilmiş olmasıdır. Gereç ve Yöntem: Bu çalışma Ankara, Çankırı, Çorum, Kayseri, Kırıkkale, Kırşehir, Nevşeh...
Article
Full-text available
Erken ve aşırı otlatma gibi yanlış kullanım meralarımızın bozulmalarına sebep olmakta ve bu durumun tabii sonucu olarak hem kalite ve hem de verim değerleri düşmektedir. Mevcut durumun tespit edilmesi ve gerekli tedbirlerin alınması gereklidir. Bu nedenle Çankırı ili mera alanlarında 2008 yılında vejetasyon etüt çalışmaları yapılmıştır. Bu çalışmal...
Article
Full-text available
Normalized Difference Vegetation Index (NDVI) is calculated from satellite data and has been widely used for vegetation monitoring. The objective of this study was to investigate distribution of vegetation intensity and to determine temporal characteristics of this vegetation such as start growing day and maximum vegetation intensity time. Spot-Veg...
Article
Full-text available
zet 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...
Article
Abstract: In this study, the effect of emissions of Yatagan Coal Power plant on the heavy metal content of agricultural and forest soils surrounding of the central were investigated. For this purpose, 27 soil and 41 plant samples were collected, based on the dominant wind direction and the other directions, from the varying distances between 721 m...
Article
Full-text available
Özet: Bu aratõrmada Çayõrhan Termik Santralõ baca gazõ emisyonlarõnõn çevre topraklarõ üzerine yapmõ� oldu ğu etkiler aratõrõlmõ� tõr. Bu amaçla emisyonlarõn hakim rüzgar yönünde hareket edece ği göz önüne alõnarak güney do ğu yönünde bulunan tarõm alanlarõndan 20 adet, kuzey do ğu yönünden santral merkez kabul edilmek üzere Beypazarõ ilçesine do ğ...
Article
Full-text available
Bu arastirmada Cayirhan Termik Santrali baca gazi emisyonlarinin cevre topraklari uzerine yapmis oldugu etkilerarastirilmistir. Bu amacla emisyonlarin hakim ruzgar yonunde hareket edecegi goz onune alinarak guney dogu yonundebulunan tarim alanlarindan 20 adet, kuzey dogu yonunden santral merkez kabul edilmek uzere Beypazari ilcesine dogru 7adet ve...
Article
Full-text available
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 fr...
Article
Full-text available
Desertification has recognized as an environmental problem by many international organizations such as UN, NATO and FAO. Desertification in Turkey is generally caused by incorrect land use, excessive grazing, forest fires, urbanization, industry, genetic erosion, soil erosion, salinization, and uncontrolled wild type plants picking. Due to anthropo...
Article
Full-text available
Agricultural policy plays a major role in effective management of natural resources of a country. It is important that the acreage and condition of the various crop production sites, amounts and yields should be determined and forecast on time for a complete set up of agricultural planning. Otherwise, the development of agricultural policies in com...
Article
Full-text available
Gaziantep Tarım il Müdürlüğü ile işbirliği halinde yürütülen bu çalışmada CBS ve uzaktan algılama teknikleri kullanılarak Gaziantep ilindeki tarım alanlarının özellikle ilde ekonomik önemi fazla olan antepfıstığı ve zeytin alanlarının miktarı ve dağılımı belirlenmiştir. Bu amaçla Gaziantep ilini kaplayan farklı iki döneme ait uydu görüntüleri yer d...
Article
Full-text available
Güllük Körfezi, giderek artan kullanım baskıları altındadır. Körfezin mevcut durumu ve hangi kirletici unsurlardan ne oranlarda etkilediği tam olarak bilinmemektedir. 2000 yılında yürütülen bu pilot çalışmada Muğla ili, Güllük Körfezi`nde seçilen ve koordinatları küresel konumlama sistemi (GPS) ile tespit edilmiş 35 değişik noktadan toplanan deniz...
Article
Full-text available
Türkiye bulunduğu coğrafya ve sahip olduğu uygun ekolojik koşullar nedeniyle pamuk üreticisi ülkeler arasında önemli bir yere sahiptir. Pamuk ekim alanlarının miktarının belirlenmesi yapılacak ekonomik planlamalarda özellikle teşvik uygulamalarının değerlendirilmesi açısından önemlidir. Bu çalışma ile uzaktan algılama tekniklerinden faydalanılarak...
Article
Full-text available
Soils show variations as a result of natural soil forming processes and human activities reflected in different spatial and temporal scales. These variations were prepared soil maps having different scales. These soil maps were used by specialists in very different disciplines. Data extracted from soil map can be attached to attribute tables of soi...

Network

Cited By